BMW Vehicle Models Z4 2009-2016 Torque Specifications
BMW Vehicle Models Z4 2009-2016

BMW Vehicle Models Z4 2009-2016 Torque Specifications

Complete BMW Vehicle Models Z4 2009-2016 torque specifications guide. Includes factory-specified torque values, torque sequences, and technical specifications for all components including body, brakes, drivetrain, electrical, emissions sensors, fuel, exhaust, HVAC, and suspension. Essential information for proper assembly and maintenance.

Updated

Important Information

Safety guidelines and reference information for proper torque application

Quick Reference Guide
ft-lbs → Nm
× 1.356
ft-lbs → kg-m
× 0.138
Nm → ft-lbs
× 0.738
in-lbs → ft-lbs
× 0.083

Common Torque Patterns

Star Pattern

Used for wheels and other circular bolt patterns

Star Pattern torque pattern diagram showing proper bolt tightening sequence
Cross Pattern

Used for gaskets and cover plates

Cross Pattern torque pattern diagram showing proper bolt tightening sequence
Sequential Pattern

Used for head bolts and other critical components

Sequential Pattern torque pattern diagram showing proper bolt tightening sequence

Common Mistakes to Avoid

Over-tightening

Exceeding the specified torque value can stretch or break fasteners, damage threads, or crack components.

Prevention:

Always use a calibrated torque wrench and follow specifications exactly.

Incorrect Torque Sequence

Tightening bolts in the wrong order can cause uneven pressure distribution and potential leaks or damage.

Prevention:

Follow the manufacturer's specified torque sequence pattern.

Dirty Threads

Dirt, rust, or old thread locker can affect torque readings and proper fastener tension.

Prevention:

Clean and inspect all threads before assembly. Use new thread locker if specified.

Reusing TTY Bolts

Torque-to-yield bolts are designed to stretch and must not be reused.

Prevention:

Always replace TTY bolts with new ones. They are single-use only.

Dry vs. Lubricated

Not accounting for whether torque specs are for dry or lubricated fasteners can lead to incorrect tension.

Prevention:

Check if specs are for dry or lubricated threads. Use specified lubricant when required.

Recommended Tools

Torque Wrench (1/4" Drive)

Range: 2-25 ft-lbs
Small fasteners, delicate components

Torque Wrench (3/8" Drive)

Range: 10-100 ft-lbs
Most common automotive fasteners

Torque Wrench (1/2" Drive)

Range: 30-250 ft-lbs
Large fasteners, wheels

Angle Gauge

Torque-to-yield (TTY) bolts

Torque Wrench Care

  • Calibrate annually or after 5,000 clicks
  • Store at lowest setting
  • Keep clean and lubricated

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Search by component name, bolt size, or description

Torque Calculator

Convert between different torque units

2.0l Engine

Torque specifications for 2.0L Engine

Cylinder Head and Valvetrain

1

Cylinder Head Bolts

M12 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
2

Valve Cover Bolts

M8 x 1.25
Torque Specification
8 ft-lbs (11 N·m)
3

Rocker Arms/Shafts Bolts

M10 x 1.5
Torque Specification
15 ft-lbs (20 N·m)

Engine Block and Crankshaft

1

Main Bearing Bolts

M14 x 2.0
Torque Specification
60 ft-lbs (80 N·m)
2

Connecting Rod Nuts

M12 x 1.75
Torque Specification
30 ft-lbs (40 N·m)
3

Crankshaft Pulley/Harmonic Balancer Bolt

M16 x 2.0
Torque Specification
81 ft-lbs (110 N·m)

Timing and Accessory Components

1

Timing Belt/Chain Tensioner Bolt

M10 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
2

Camshaft Sprocket Bolt

M12 x 1.75
Torque Specification
55 ft-lbs (75 N·m)
3

Water Pump Bolts

M8 x 1.25
Torque Specification
8 ft-lbs (11 N·m)

Engine Mounting and Transmission

1

Engine Mounting Bolts

M14 x 2.0
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Estimated value based on general industry standards.
2

Engine Block to Transmission Bellhousing Bolts

M12 x 1.75
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Estimated value based on general industry standards.

Intake and Exhaust System

1

Intake Manifold Bolts

M10 x 1.5
Torque Specification
15 ft-lbs (20 N·m)
2

Exhaust Manifold/Header Bolts

M12 x 1.75
Torque Specification
18 ft-lbs (25 N·m)
3

Throttle Body Bolts

M8 x 1.25
Torque Specification
8 ft-lbs (11 N·m)

Electrical and Ignition System

1

Spark Plug Bolts

M14 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
2

Ignition Coil Bolt

M8 x 1.25
Torque Specification
8 ft-lbs (11 N·m)
3

Starter Motor Mounting Bolts

M12 x 1.75
Torque Specification
27 ft-lbs (37 N·m)

3.0l Engine

Torque specifications for 3.0L Engine

Cylinder Head

1

Cylinder Head Bolts

M10 x 1.5
Torque Specification
1. 18 ft-lbs (25 N·m)
Important Notes
Torque bolts in a sequence as specified in the repair manual. Multiple passes may be required.

Crankshaft And Bearings

1

Main Bearing Bolts

M12 x 1.5
Torque Specification
60 ft-lbs (80 N·m)
Important Notes
Ensure proper bearing cap orientation. Torque in stages, starting from the center of the engine block and working outwards.
2

Connecting Rod Nuts

M10 x 1.25
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Ensure the connecting rod bearing inserts are properly aligned. Torque in multiple steps.
3

Flywheel Bolts

M10 x 1.5
Torque Specification
55 ft-lbs (75 N·m)
Important Notes
Apply thread locker. Torque in star pattern.
4

Crankshaft Pulley/Harmonic Balancer Bolt

M14 x 1.5
Torque Specification
81 ft-lbs (110 N·m)
Important Notes
Use a crank holding tool to prevent rotation while tightening

Oil System

1

Oil Pan Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Tighten bolts in a criss-cross pattern. Do not over tighten.
2

Oil Filter Housing Cap

N/A
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Tighten by hand until snug, then use a filter cap wrench to tighten until you feel a firm seating and correct torque is achieved.
3

Oil Drain Plug Bolt

M12 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Always use a new crush washer when installing the drain plug. Do not over tighten.

Valve Train

1

Camshaft Bearing Cap Bolts

M6 x 1.0
Torque Specification
1. 4 ft-lbs (5 N·m) 2. 8 ft-lbs (11 N·m)
Important Notes
Torque bolts in sequence and in stages to ensure even pressure on the camshaft.
2

Camshaft Sprocket Bolt

M10 x 1.25
Torque Specification
55 ft-lbs (75 N·m)
Important Notes
Ensure that the camshaft is locked before attempting to tighten the sprocket bolt.
3

Rocker Arms/Shafts Bolts

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Torque evenly to avoid damage to valve train components. Follow the correct torque sequence.
4

Timing Belt/Chain Tensioner Bolt

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure timing chain is correctly aligned before tightening tensioner.
5

Variable Valve Timing (VANOS) Solenoid Mounting Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Do not overtighten bolts.
6

Variable Valve Timing (VANOS) Unit Mounting Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure the VANOS unit is correctly positioned when installed.

Induction And Exhaust

1

Intake Manifold Bolts

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Tighten bolts in a criss-cross pattern to ensure even sealing. Start from the center bolts and work your way out.
2

Throttle Body Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Do not over tighten to avoid damage.
3

Exhaust Manifold/Headers to Cylinder Head Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Torque bolts in a sequence starting from the center.

Cooling System

1

Water Pump Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Tighten evenly to prevent leaks.
2

Water Pump Pulley Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Tighten bolts evenly.
3

Thermostat Housing Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Do not over tighten the bolts.
4

Coolant Temperature Sensor

M10 x 1.0
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure the sensor is installed with a new gasket or sealant to prevent leaks

Fuel System

1

Fuel Injector Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Do not overtighten to avoid fuel leaks.
2

Fuel Injector Rail Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Do not over tighten as this may damage the fuel rail

Ignition System

1

Ignition Coil Bolt

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Do not over tighten as this could affect coil performance.
2

Spark Plugs

M14 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Always ensure correct spark plug torque.

Sensors

1

Knock Sensor Bolt

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure the knock sensor is correctly oriented.
2

Crankshaft Position Sensor Bolt

M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Ensure sensor is fully seated and do not overtighten.

Engine Mounting

1

Engine Mount Bolts

M12 x 1.75
Torque Specification
1. 37 ft-lbs (50 N·m) 2. 90°
Important Notes
Tighten to the specified torque, then perform the additional angle turn. These specs are estimated as information was incomplete. Please consult your service manual to confirm the procedure and torque values for your application.

8hp Transmission

Torque specifications for 8hp Transmission

External Mounting

1

Transmission Mounting Bolts (to engine)

M12 x 1.75
Torque Specification
55 ft-lbs (75 N·m)
Important Notes
Ensure proper alignment before tightening. Use new bolts if specified by the manufacturer.
2

Transmission Mounting Bolts (to chassis)

M12 x 1.75
Torque Specification
55 ft-lbs (75 N·m)
Important Notes
Ensure proper alignment before tightening. Use new bolts if specified by the manufacturer. Estimated value; refer to the vehicle specific manual for more accurate data.
3

Transmission Case Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Tighten in a cross pattern and gradual stages, ensuring even clamping force. Estimated value; refer to the vehicle specific manual for more accurate data.
4

Transmission Oil Pan Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Tighten bolts in a cross pattern to prevent leaks. Do not overtighten. Be careful to not strip the bolt threads, the transmission case is aluminum.
5

Transmission Cooler Line Fittings

M18 x 1.5
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Use new sealing washers. Be cautious not to overtighten, damage to the threads on the transmission housing can easily occur. Estimated value; refer to the vehicle specific manual for more accurate data.
6

Transmission Fluid Drain/Fill Plug

M24 x 1.5
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Use a new sealing washer. Do not overtighten as this can damage the threads in the aluminum transmission case. Estimated value; refer to the vehicle specific manual for more accurate data.

Internal Components

1

Transmission Mechatronic Unit Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Tighten bolts in a cross pattern to ensure even pressure on the sealing surfaces. Verify proper o-ring alignment. These bolts torque very low, use an in-lb torque wrench. Be cautious to not strip the bolt threads. Estimated value; refer to the vehicle specific manual for more accurate data.
2

Transmission Valve Body Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Tighten bolts in a cross pattern to ensure proper sealing. Use an in-lb torque wrench. These bolts torque very low, be cautious to not strip the threads. Estimated value; refer to the vehicle specific manual for more accurate data.

Output Shaft

1

Transmission Output Shaft Flange Bolts

M10 x 1.5
Torque Specification
44 ft-lbs (60 N·m)
Important Notes
Ensure proper alignment of the output flange before tightening. Verify bolts are properly seated. Use a threadlocker if specified by the manufacturer. Estimated value; refer to the vehicle specific manual for more accurate data.

Body

Torque specifications for Body

Fuel System

1

Fuel Tank Strap Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure proper alignment of the straps before tightening. Use new bolts if available.
2

Fuel Filler Neck Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Do not over-tighten. Check for proper sealing after installation.

Exterior Panels

1

Hood Hinge Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Apply a small amount of anti-seize to the threads to prevent galling. Torque should be within 15-20 ft-lbs range, this is the estimated mid-point.
2

Fender Mounting Bolts

M6 x 1.0
Torque Specification
12 ft-lbs (16 N·m)
Important Notes
Torque should be within 10-15 ft-lbs range. This value is an estimate based on common sizes.
3

Bumper Mounting Bolts/Nuts

M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Torque should be within 15-22 ft-lbs range, this is the estimated mid-point. Tighten bolts in a cross-pattern to ensure even pressure.
4

Headlight Assembly Mounting Bolts/Nuts

M6 x 1.0
Torque Specification
9 ft-lbs (12 N·m)
Important Notes
Do not over-tighten these bolts to avoid cracking the headlight housing. Torque within 8-10 ft-lbs is normal for this application.
5

Tail Light Assembly Mounting Bolts/Nuts

M5 x 0.8
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Be careful not to over-torque these small bolts. Torque should be within the 5-8 ft-lbs range.

Door Components

1

Door Hinge Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Torque should be within 18-25 ft-lbs range, this is the estimated mid-point.
2

Door Latch/Striker Bolts

M6 x 1.0
Torque Specification
12 ft-lbs (16 N·m)
Important Notes
Torque should be within 10-15 ft-lbs range, this is the estimated mid-point.

Trunk Components

1

Trunk/Boot Lid Hinge Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Torque should be within 15-20 ft-lbs range, this is the estimated mid-point.
2

Trunk/Boot Latch/Striker Bolts

M6 x 1.0
Torque Specification
12 ft-lbs (16 N·m)
Important Notes
Torque should be within 10-15 ft-lbs range, this is the estimated mid-point.

Interior Components

1

Seat Mounting Bolts

M10 x 1.5
Torque Specification
30 ft-lbs (41 N·m)
Important Notes
Ensure proper engagement of the bolt threads before tightening. Torque should be within the 25-35 ft-lbs range, this is an estimated mid-point.
2

Interior Trim Panel Fasteners

M4 x 0.7
Torque Specification
5 ft-lbs (7 N·m)
Important Notes
These are often smaller screws; do not overtighten. Torque is usually specified in inch-pounds, this is the estimate of 3-7 ft-lbs range.

Body Panel Clips

1

Body Panel Retaining Clips/Fasteners

N/A
Torque Specification
N/A
Important Notes
Many body panels are secured by clips and plastic fasteners. Hand-tighten and check for proper fit and tension. If you must torque these, refer to specific values in the service manual.

Brakes

Torque specifications for Brakes

Caliper Mounting

1

Caliper Mounting Bolts

M12 x 1.5
Torque Specification
80 ft-lbs (108 N·m)
Important Notes
These bolts secure the brake caliper directly to the caliper mounting bracket. Always use new bolts and follow the manufacturer's recommended tightening sequence. These are typically high-strength bolts and often require replacement after removal.
2

Caliper Mounting Bracket Bolts

M14 x 1.5
Torque Specification
110 ft-lbs (150 N·m)
Important Notes
These bolts attach the caliper mounting bracket to the wheel hub/steering knuckle. These are critical in securing the entire brake assembly and are subjected to high forces during braking. Proper torque is vital to maintain the structural integrity of the braking system. Always replace with new bolts.

Rotor Mounting

1

Brake Disc Retaining Screws

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
These screws hold the brake rotor to the wheel hub. They are low torque and their primary role is to keep the rotor in place during wheel changes. Do not over-tighten. Torque values are estimated; refer to the specific manufacturer's manual for precise specifications.

Brake Lines

1

Brake Line to Caliper Bolt

M10 x 1.0
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
This bolt connects the hard brake line to the flexible hose at the caliper. Over-tightening can damage the line or fittings, while under-tightening can cause leaks. Use new copper washers to ensure a proper seal.
2

Brake Caliper Bleeder Screw

M7 x 1.0
Torque Specification
9 ft-lbs (12 N·m)
Important Notes
The bleeder screw is used to remove air from the brake system. Over-tightening can strip the threads or break the screw, while under-tightening will lead to leaks. Torque values are estimated; refer to the specific manufacturer's manual for precise specifications.

Pad Retention

1

Brake Pad Retaining Pin/Bolt

M6 x 1.0
Torque Specification
12 ft-lbs (16 N·m)
Important Notes
These pins or bolts hold the brake pads in place. Over-tightening can distort the pad retaining hardware or damage the caliper, while under-tightening can allow the pads to move causing issues with braking. Torque values are estimated; refer to the specific manufacturer's manual for precise specifications.

Sensors

1

Brake Rotor Wear Sensor Screw/Bolt

M4 x 0.7
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
The wear sensor is bolted to the brake pad using a small screw/bolt. This is important to prevent damage to the pad and sensor. Do not over tighten. Torque values are estimated; refer to the specific manufacturer's manual for precise specifications.
2

ABS Sensor Mounting Bolt

M6 x 1.0
Torque Specification
9 ft-lbs (12 N·m)
Important Notes
The ABS sensor is mounted near the wheel hub. Proper torque ensures the correct sensor operation and avoids damage. Torque values are estimated; refer to the specific manufacturer's manual for precise specifications.

Wheel Mounting

1

Wheel Lug Nuts/Bolts

M12 x 1.5
Torque Specification
90 ft-lbs (120 N·m)
Important Notes
These lug nuts/bolts secure the wheel to the hub and rotor assembly. Proper torque is essential to ensure even clamping force and prevent warping of the rotor or wheel separation. Tighten in a star pattern.

Drivetrain

Torque specifications for Drivetrain

Engine To Transmission

1

Transmission to Engine Bolts (Upper)

M12 x 1.75
Torque Specification
55 ft-lbs (75 N·m)
Important Notes
Apply thread locker (e.g. Loctite 242). These are the upper bolts of the transmission to engine connection
2

Transmission to Engine Bolts (Lower)

M10 x 1.5
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Apply thread locker (e.g. Loctite 242). These are the lower bolts of the transmission to engine connection

Flywheel

1

Flywheel Bolts

M10 x 1.0
Torque Specification
1. 15 ft-lbs (20 N·m) 2. 55 ft-lbs (75 N·m)
Important Notes
Use new bolts. Tighten in a star pattern.

Transmission Mounting

1

Transmission Mounting Bolts (Front)

M12 x 1.75
Torque Specification
48 ft-lbs (65 N·m)
Important Notes
Apply thread locker (e.g. Loctite 242).
2

Transmission Mounting Bolts (Rear)

M10 x 1.5
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Apply thread locker (e.g. Loctite 242).

Transmission Oil Pan

1

Transmission Oil Pan Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Tighten in a criss-cross pattern.

Driveshaft

1

Driveshaft to Transmission Flange Bolts

M10 x 1.5
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Apply thread locker (e.g. Loctite 242). Tighten bolts in a star pattern
2

Driveshaft to Differential Flange Bolts

M10 x 1.5
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Apply thread locker (e.g. Loctite 242). Tighten bolts in a star pattern

Drive Axles

1

Drive Axle to Transmission Flange Bolts

M8 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Apply thread locker (e.g. Loctite 242). Tighten in a star pattern.
2

Drive Axle to Wheel Hub Bolts

M8 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Apply thread locker (e.g. Loctite 242). Tighten in a star pattern.

Cv Joints

1

CV Joint/Axle Nut

M24 x 1.5
Torque Specification
150 ft-lbs (203 N·m)
Important Notes
Use new nut. Torque spec may vary by vehicle model; always verify from the specific service manual

Differential Mounting

1

Differential Mounting Bolts (Front)

M14 x 1.5
Torque Specification
74 ft-lbs (100 N·m)
Important Notes
Apply thread locker (e.g. Loctite 242).
2

Differential Mounting Bolts (Rear)

M12 x 1.75
Torque Specification
50 ft-lbs (68 N·m)
Important Notes
Apply thread locker (e.g. Loctite 242).

Differential Plugs

1

Differential Drain Plug

M16 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Use new crush washer.
2

Differential Fill Plug

M16 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Use new crush washer.

Starter Motor

1

Starter Motor Mounting Bolts

M10 x 1.5
Torque Specification
27 ft-lbs (37 N·m)
Important Notes
Apply thread locker (e.g. Loctite 242).

Electrical

Torque specifications for Electrical

Ignition System

1

Ignition Coil Mounting Bolt

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Ensures proper coil grounding and heat dissipation. Over-tightening can damage the coil or mounting point.

Starting System

1

Starter Motor Mounting Bolts

M10 x 1.5
Torque Specification
27 ft-lbs (37 N·m)
Important Notes
Ensures proper alignment with flywheel and good electrical ground. Under-tightening can cause shifting and poor grounding. Over-tightening can damage mounting points.

Charging System

1

Alternator Mounting Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensures correct belt tension and good electrical ground. Over-tightening can deform housing; under-tightening can cause shifting and vibration.

Battery System

1

Battery Terminal Nuts

M6 x 1.0
Torque Specification
5 ft-lbs (7 N·m)
Important Notes
Maintains good electrical connection, avoid over-tightening which can damage battery terminals.

Ecm System

1

Engine Control Unit (ECU) Mounting Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Ensures ECU is properly grounded and protected from vibration. Estimated value, check manufacturer specs if available.

Grounding System

1

Ground Strap Mounting Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Maintains low resistance electrical connection to the chassis, engine block, etc. Estimated value, check manufacturer specs if available.

Fuse Relay System

1

Relay and Fuse Box Mounting Bolts/Screws

M4 x 0.7
Torque Specification
3 ft-lbs (4 N·m)
Important Notes
Secures fuse and relay boxes and ensures proper grounding. Estimated value, check manufacturer specs if available.

Emissions Sensors

Torque specifications for Emissions_sensors

Exhaust System

1

Exhaust Manifold/Headers to Cylinder Head

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure even torque distribution across all bolts.
2

Exhaust Pipe to Exhaust Manifold/Headers

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Inspect gaskets for damage before installation.
3

Catalytic Converter to Exhaust Pipe

M10 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Use new gaskets if available.

Egr System

1

EGR Valve Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Do not over-tighten the bolts.

Oxygen Sensors

1

Oxygen Sensor (Pre-Catalyst)

M18 x 1.5
Torque Specification
30 ft-lbs (41 N·m)
Important Notes
Use anti-seize compound on threads and ensure new crush washer is used. This is an estimated torque value.
2

Oxygen Sensor (Post-Catalyst)

M18 x 1.5
Torque Specification
30 ft-lbs (41 N·m)
Important Notes
Use anti-seize compound on threads and ensure new crush washer is used. This is an estimated torque value.

Nox Sensor

1

NOx Sensor Mounting Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Do not over-tighten the bolts. Ensure proper alignment of the sensor.

Pressure Sensors

1

Differential Pressure Sensor Bolts/Screws

M5 x 0.8
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
These are often very small bolts or screws. Do not over-tighten, and ensure proper sensor alignment.

Exhaust

Torque specifications for Exhaust

Exhaust Manifold

1

Exhaust Manifold to Cylinder Head Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Use a criss-cross pattern when tightening these bolts to ensure even clamping pressure.

Exhaust Downpipe

1

Exhaust Pipe to Exhaust Manifold/Headers Bolts

M10 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Tighten bolts in a criss-cross pattern. Ensure a new gasket is used.

Catalytic Converter

1

Catalytic Converter to Exhaust Pipe Bolts

M10 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure to install a new gasket. Tighten bolts in a criss-cross pattern.

Muffler

1

Muffler to Exhaust Pipe Bolts

M10 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure a new gasket is used. Tighten bolts evenly in a criss-cross pattern.

Exhaust Hangers

1

Exhaust Hanger Bolts/Nuts

M8 x 1.25
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
These bolts/nuts secure the exhaust system to the vehicle chassis. Do not overtighten.

Exhaust Flanges

1

Exhaust Flange Bolts/Nuts

M10 x 1.5
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Use a new gasket and tighten in a criss-cross pattern.

Fuel

Torque specifications for Fuel

Fuel Rail

1

Fuel Rail Mounting Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Ensure even tightening to prevent fuel rail distortion. Replace sealing washers if applicable.
2

Fuel Injector Mounting Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Do not overtighten; can damage injector or cause leaks. Replace O-rings if removed.
3

Fuel Pressure Regulator Mounting Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Ensure proper alignment of the regulator before tightening bolts. Replace gasket if removed.

Fuel Pump

1

Fuel Pump Mounting Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Tighten evenly to ensure proper seal. Check for any leaks after installation.
2

Fuel Tank Strap Bolts

M10 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure straps are correctly positioned. Use new bolts if old ones are damaged.
3

Fuel Filler Neck Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Ensure the filler neck is properly aligned with the fuel tank opening. Replace any damaged gaskets.

Fuel Lines

1

Fuel Line Banjo Bolt (Small Line)

M10 x 1.0
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Estimated value. Use new crush washers. Overtightening will damage the fitting.
2

Fuel Line Banjo Bolt (Large Line)

M12 x 1.5
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Estimated value. Use new crush washers. Overtightening will damage the fitting.
3

Fuel Filter Mounting Bolt

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Ensure filter is properly seated before tightening.

High Pressure Pump

1

High Pressure Fuel Pump Mounting Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Tighten evenly to ensure proper seal. Use new bolts if old ones are damaged.

Hvac

Torque specifications for Hvac

Ac Compressor

1

A/C Compressor Mounting Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Estimated value, verify with specific repair manual. Use a criss-cross pattern when tightening bolts.

Ac Lines

1

A/C Line Fitting (Low Pressure)

M16 x 1.5
Torque Specification
12 ft-lbs (16 N·m)
Important Notes
Estimated value, verify with specific repair manual. Be cautious not to overtighten and damage the o-ring seal. Use a backup wrench when tightening these lines
2

A/C Line Fitting (High Pressure)

M18 x 1.5
Torque Specification
14 ft-lbs (19 N·m)
Important Notes
Estimated value, verify with specific repair manual. Be cautious not to overtighten and damage the o-ring seal. Use a backup wrench when tightening these lines

Ac Condenser

1

A/C Condenser Mounting Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Estimated value, verify with specific repair manual. Use a criss-cross pattern when tightening bolts.

Ac Evaporator

1

A/C Evaporator Core Housing Bolts

M5 x 0.8
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Estimated value, verify with specific repair manual. Ensure proper sealing to prevent air leaks.

Blower Motor

1

HVAC Blower Motor Mounting Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Estimated value, verify with specific repair manual. Avoid over-tightening to prevent damage to the blower motor housing.

Control Unit

1

HVAC Control Unit Mounting Bolts

M5 x 0.8
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Estimated value, verify with specific repair manual. Do not over-tighten to avoid damaging the control unit.

Hvac Actuators

1

HVAC Actuator Mounting Screws

M4 x 0.7
Torque Specification
5 ft-lbs (7 N·m)
Important Notes
Estimated value, verify with specific repair manual. Over-tightening can damage the actuator housing or the actuator itself. Tighten slowly and evenly.

Receiver Drier

1

Receiver Drier/Accumulator Mounting Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Estimated value, verify with specific repair manual.

Expansion Valve

1

Expansion Valve Mounting Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Estimated value, verify with specific repair manual. Avoid over-tightening as it may affect refrigerant flow.

Pressure Sensor

1

A/C Pressure Sensor Mounting Screws/Bolts

M4 x 0.7
Torque Specification
5 ft-lbs (7 N·m)
Important Notes
Estimated value, verify with specific repair manual. Avoid over-tightening which could damage the sensor and seal. Use a proper size wrench to prevent damage to the sensor.

Suspension

Torque specifications for Suspension

Front Suspension

1

Strut to Steering Knuckle Bolts

M12 x 1.5
Torque Specification
81 ft-lbs (110 N·m)
Important Notes
Ensure bolts are clean and threads are in good condition. Tighten to specified torque.
2

Strut Tower/Upper Mount Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Tighten these bolts evenly to prevent damage to the strut tower. Estimated value.
3

Lower Control Arm to Subframe Bolts

M12 x 1.5
Torque Specification
81 ft-lbs (110 N·m)
Important Notes
Tighten with the suspension at ride height for proper bushing preload. Estimated value.
4

Lower Control Arm to Steering Knuckle Ball Joint Nut

M14 x 1.5
Torque Specification
81 ft-lbs (110 N·m)
Important Notes
Ensure the ball joint taper is correctly seated in the steering knuckle. Estimated value.
5

Tie Rod End Nut

M14 x 1.5
Torque Specification
48 ft-lbs (65 N·m)
Important Notes
Ensure the tie rod end is correctly positioned in the steering knuckle. Estimated value.
6

Sway Bar Link to Strut Bolt

M10 x 1.5
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Ensure the sway bar link is properly aligned. Estimated value.
7

Sway Bar Link to Sway Bar Nut

M10 x 1.5
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Ensure the sway bar link is properly aligned. Estimated value.

Rear Suspension

1

Rear Upper Control Arm to Subframe Bolt

M12 x 1.5
Torque Specification
66 ft-lbs (90 N·m)
Important Notes
Tighten with the suspension at ride height. Estimated value.
2

Rear Upper Control Arm to Wheel Carrier Bolt

M12 x 1.5
Torque Specification
66 ft-lbs (90 N·m)
Important Notes
Ensure proper alignment before tightening. Estimated value.
3

Rear Lower Control Arm to Subframe Bolt

M12 x 1.5
Torque Specification
81 ft-lbs (110 N·m)
Important Notes
Tighten with the suspension at ride height. Estimated value.
4

Rear Lower Control Arm to Wheel Carrier Bolt

M14 x 1.5
Torque Specification
81 ft-lbs (110 N·m)
Important Notes
Ensure proper alignment before tightening. Estimated value.
5

Rear Subframe Mounting Bolts

M14 x 2.0
Torque Specification
1. 88 ft-lbs (120 N·m) 2. 90°
Important Notes
Use a torque-angle method. Tighten all bolts to initial torque, then rotate an additional 90 degrees. Replace bolts if removed. Estimated value.

Steering System

1

Steering Rack to Subframe Bolts

M12 x 1.75
Torque Specification
52 ft-lbs (70 N·m)
Important Notes
Ensure proper alignment of the steering rack to the subframe. Estimated value.

Wheel And Brakes

1

Wheel Lug Nuts

M12 x 1.5
Torque Specification
90 ft-lbs (120 N·m)
Important Notes
Tighten wheel lug nuts in a star pattern. Check torque after 50-100 miles.
2

Brake Caliper Bolts

M10 x 1.5
Torque Specification
80 ft-lbs (108 N·m)
Important Notes
Ensure brake caliper slides are lubricated and caliper is seated properly.
3

Brake Caliper Mounting Bracket Bolts

M12 x 1.75
Torque Specification
110 ft-lbs (150 N·m)
Important Notes
Ensure bracket is properly aligned with the steering knuckle.

Troubleshooting Guide

Common issues, diagnostic steps, and prevention guidelines

Common Issues

Bolt stretching, stripped threads, uneven torque patterns

Loose Components

Symptoms:
  • Rattling or vibration noises
  • Visible movement in components
  • Uneven panel gaps
Solutions:
  • Clean threads and mounting surfaces
  • Replace damaged fasteners
  • Apply proper torque in sequence
  • Use thread locker if specified

Stripped Fasteners

Symptoms:
  • Unable to achieve proper torque
  • Fastener spins freely
  • Visible thread damage
Solutions:
  • Use thread repair kit if appropriate
  • Install thread insert (HeliCoil)
  • Replace component if threaded hole is damaged
  • Upgrade to higher grade fastener if recommended

Overtightened Components

Symptoms:
  • Cracked or deformed parts
  • Broken fasteners
  • Compressed gaskets or seals
Solutions:
  • Replace damaged components
  • Use new fasteners
  • Follow proper torque sequence
  • Verify correct torque specifications

Diagnostic Steps

Visual inspection, torque verification, thread assessment

1

Visual Inspection

Inspect the affected area for any visible signs of damage or wear

  • Check for cracks or deformation
  • Look for signs of excessive wear
  • Verify proper fastener installation
2

Torque Verification

Verify the torque applied to the fasteners

  • Check the torque wrench calibration
  • Verify the torque specification
  • Compare the applied torque to the specification
3

Thread Assessment

Assess the condition of the threads

  • Check for signs of thread damage
  • Verify the thread type and size
  • Check for proper thread engagement

Prevention Guidelines

Best practices, maintenance tips, tool care

Best Practices

  • Always follow the recommended torque specification
  • Use the correct type and size of fasteners
  • Verify the torque wrench calibration regularly

Maintenance Tips

  • Regularly inspect the affected area for signs of wear or damage
  • Replace damaged or worn-out components promptly
  • Keep the work area clean and organized

Tool Care

  • Regularly clean and maintain the torque wrench
  • Store the torque wrench in a dry and secure location
  • Verify the torque wrench calibration before each use

Frequently Asked Questions

Find answers to common questions about torque specifications

Q1

What are the recommended tightening sequences for different components on my BMW z4?

Refer to BMW Technical Document TIS 11 01 016 for the most up-to-date tightening sequences.

Q2

How do I ensure proper torque application to avoid overtightening or under-tightening?

Use a calibrated torque wrench and follow BMW's specified torque values. Double-check torque settings to prevent issues.

Q3

Can I use any torque wrench for my BMW z4?

No, it's crucial to use a torque wrench designed for automotive applications and calibrated to BMW's specifications.

Q4

Where can I find torque specifications for specific components on my 2013 BMW z4 sDrive35is?

Refer to the BMW z4 Repair Manual for the specific torque values and tightening sequences for your model and year.

Q5

How do I convert torque values from ft-lbs to Nm?

1 ft-lb = 1.356 Nm. To convert ft-lbs to Nm, multiply the ft-lb value by 1.356.

Q6

IS it safe to reuse bolts after they have been torqued once?

No, bolts should not be reused after they have been torqued to their yield point. Replace bolts as per BMW's specifications.

Environmental Considerations

Temperature, humidity, and seasonal effects on torque specifications

Temperature Effects

Includes: High Heat, Cold Weather, Thermal Cycling

Temperature can significantly impact torque values and fastener behavior

Cold Weather

Effects:
  • Increased material brittleness
  • Higher torque required due to thread contraction
  • Reduced thread lubricant effectiveness
Recommendations:
  • Allow components to warm to room temperature when possible
  • Consider using winter-grade thread lubricants
  • Check torque values more frequently during winter months

Hot Weather

Effects:
  • Thermal expansion of components
  • Decreased friction in threads
  • Accelerated lubricant breakdown
Recommendations:
  • Check torque when components are at normal operating temperature
  • Use temperature-resistant thread lockers
  • Consider re-torquing after heat cycles

Humidity and Corrosion

Covers: Rust Prevention, Salt Exposure, Moisture Control

Moisture and corrosion can affect fastener integrity and torque values

High Humidity

Effects:
  • Accelerated corrosion formation
  • Reduced friction coefficient
  • Potential thread seizing
Prevention:
  • Use corrosion-resistant fasteners
  • Apply appropriate anti-seize compounds
  • Maintain proper protective coatings

Salt Exposure

Effects:
  • Rapid corrosion development
  • Thread damage
  • Seized fasteners
Prevention:
  • Regular underbody washing
  • Use of sacrificial anodes where appropriate
  • Application of protective coatings

Seasonal Maintenance

Spring, Summer, Fall, and Winter maintenance schedules

Spring

  • Inspect for winter damage
  • Clean and protect exposed fasteners
  • Check torque on critical components

Summer

  • Monitor heat-affected components
  • Check expansion-related loosening
  • Inspect cooling system mounts

Fall

  • Prepare for winter conditions
  • Apply corrosion protection
  • Verify all fasteners are properly torqued

Winter

  • More frequent inspection of critical fasteners
  • Check for salt damage
  • Monitor suspension component torque

Related Resources

Tools, service procedures, and technical bulletins

Recommended Tools

Digital Torque Wrench (10-100 Nm)

Essential for tightening fasteners to precise torque specifications, preventing damage and ensuring proper assembly. This range IS suitable for many applications on the z4.

  • Digital display for accurate readings
  • Audible alarm when target torque IS reached
  • Multiple units (Nm, ft-lb, in-lb)
  • Reversible ratcheting mechanism
Learn more
Service Procedures

Engine Mount Replacement

Step-by-step guide for replacing engine mounts on 2009-2016 BMW z4, including torque specifications.

  • Unbolt the engine mount bolts (4 bolts, torque 50 Nm)
  • Support the engine with a floor jack.
  • Remove the engine mount bracket bolts
  • Install new engine mounts.
  • Tighten the engine mount bolts to 50 Nm.
  • Tighten the engine mount bracket bolts to 30 Nm.
  • Lower the engine and reconnect all components.
View full procedure

Brake Pad Replacement

Clear instructions for replacing brake pads on 2009-2016 BMW z4, with torque specifications.

  • Remove the wheel.
  • Remove the caliper mounting bolts and remove the caliper.
  • Remove the old brake pads.
  • Install new brake pads and anti-squeal paste.
  • Reinstall the caliper and tighten the caliper mounting bolts (2 bolts, torque 120 Nm)
  • Reinstall the wheel and tighten the lug bolts (5 bolts, torque 140 Nm).
View full procedure

Spark Plug Replacement

Comprehensive guide to replacing spark plugs on 2009-2016 BMW z4, including torque specifications.

  • Remove the engine cover.
  • Disconnect the ignition coils.
  • Remove the old spark plugs.
  • Install new spark plugs and tighten to 25 Nm.
  • Reconnect the ignition coils.
  • Reinstall the engine cover.
View full procedure
Technical Service Bulletins

Front Suspension Noise

2013-03-08

BMW Technical Service Bulletin regarding excessive noise from the front suspension of 2009-2016 z4 models.

2009-2016 z4

Resolution: Inspect and tighten the front suspension bolts to the following torque specifications: - Control arm bolts: 120 Nm - Stabilizer bar bolts: 14 Nm - Shock absorber bolts: 65 Nm - Strut bolts: 50 Nm

Brake Pedal Pulsation

2015-07-21

BMW Technical Service Bulletin addressing brake pedal pulsation on 2009-2016 z4 models.

2009-2016 z4

Resolution: Check and resurface or replace brake rotors if necessary. Inspect and replace brake pads if worn. Torque the caliper mounting bolts to 120 Nm.

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Technical Information
  • All specifications, including torque values, fluid capacities, and maintenance procedures, should be verified against your vehicle's factory service manual.
  • Vehicle specifications and procedures may vary by model year, trim level, and region.
  • Always follow the manufacturer's recommended procedures and safety precautions.
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About the Author

Expert automotive knowledge and experience

Alan Montanye - Automotive Technical Specialist
ASE

Alan Montanye

Automotive Technical Specialist

ASE Master Certified Technician with over a decade of hands-on experience in automotive repair and diagnostics.

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