BMW Vehicle Models 330i 2005-2011 Torque Specifications
BMW Vehicle Models 330i 2005-2011

BMW Vehicle Models 330i 2005-2011 Torque Specifications

Complete BMW Vehicle Models 330i 2005-2011 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

Search Specifications

Search by component name, bolt size, or description

Torque Calculator

Convert between different torque units

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) 2. 90°
Important Notes
Use a new set of bolts. Tighten in a specified sequence. Angle torque is critical and requires a torque angle gauge. Torque to yield bolts.
2

Camshaft Bearing Cap Bolts

M6 x 1.0
Torque Specification
1. 7.33 ft-lbs (10 N·m) 2. 90°
Important Notes
Tighten in specified sequence. Angle torque is critical. Estimated angle value, consult repair documentation. Torque to yield bolts.
3

Valve Cover Bolts

M6 x 1.0
Torque Specification
7.33 ft-lbs (10 N·m)
Important Notes
Use inch-pound torque wrench. Tighten evenly to prevent leaks.
4

Rocker Arms/Shafts Bolts

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure rocker arm alignment during tightening. Tighten evenly.
5

Spark Plugs

M14 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure proper spark plug thread engagement before tightening. Do not overtighten.
6

Exhaust Manifold/Headers Bolts

M8 x 1.25
Torque Specification
1. 18 ft-lbs (25 N·m) 2. 22 ft-lbs (30 N·m)
Important Notes
Tighten in a specific sequence from center outward to avoid warping. Two stage tightening.
7

Ignition Coil Bolt

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Do not overtighten, may damage plastic.

Engine Block

1

Main Bearing Bolts

M12 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Tighten in a specified sequence, ensuring proper main bearing cap alignment. Verify proper bearing clearances after tightening.
2

Connecting Rod Nuts

M9 x 1.25
Torque Specification
1. 15 ft-lbs (20 N·m) 2. 60°
Important Notes
Tighten in stages using a torque angle gauge. Use new connecting rod nuts. Angle torque value is estimated, check repair documentation.
3

Oil Pan Bolts

M6 x 1.0
Torque Specification
6.75 ft-lbs (9 N·m)
Important Notes
Use inch-pound torque wrench. Tighten evenly to prevent leaks. Use a new gasket.
4

Oil Pump Bolts

M6 x 1.0
Torque Specification
6.75 ft-lbs (9 N·m)
Important Notes
Use inch-pound torque wrench. Tighten evenly.
5

Oil Drain Plug Bolt

M14 x 1.5
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Use a new crush washer. Do not overtighten.

Crankshaft And Flywheel

1

Flywheel Bolts

M10 x 1.5
Torque Specification
52 ft-lbs (70 N·m)
Important Notes
Use new flywheel bolts. Tighten in a star pattern to ensure even distribution of force.
2

Crankshaft Pulley/Harmonic Balancer Bolt

M18 x 1.5
Torque Specification
81 ft-lbs (110 N·m)
Important Notes
Use new bolt. Proper torque is critical for preventing vibrations and damage.

Timing System

1

Timing Belt/Chain Tensioner Bolt

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure tensioner is properly engaged. Retorque after initial engine run-in period. Torque value is for tensioner mount, tensioner rod itself typically has no torque value.
2

Camshaft Sprocket Bolt

M10 x 1.25
Torque Specification
36 ft-lbs (50 N·m)
Important Notes
Ensure camshaft alignment marks are correct. Torque to ensure proper valve timing.
3

VANOS Adjuster Unit Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure proper VANOS unit alignment. Tighten evenly.
4

VANOS Solenoid Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Do not overtighten, may damage plastic housing.

Intake And Exhaust

1

Throttle Body Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure proper throttle body gasket is installed. Do not overtighten.
2

Intake Manifold Bolts

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Tighten evenly to prevent leaks, in a specified sequence from the center outward.
3

EGR Valve Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure proper EGR valve gasket is used. Tighten evenly.
4

Exhaust Gas Temperature (EGT) Sensor

M10 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Do not overtighten, can damage sensor.

Fuel System

1

Fuel Rail Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure fuel rail is seated correctly. Do not overtighten to prevent fuel leaks.
2

Fuel Injector Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure proper injector seating. Do not overtighten to prevent fuel leaks.

Cooling System

1

Water Pump Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure proper water pump gasket is used. Tighten evenly.
2

Water Pump Pulley Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure pulley is seated correctly.
3

Thermostat Housing Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure proper thermostat housing gasket is used. Tighten evenly to prevent leaks.
4

Coolant Temperature Sensor/Sending Unit

M12 x 1.5
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Ensure proper sensor sealing. Do not overtighten.

Accessory Drive

1

Serpentine/Accessory Drive Belt Tensioner Bolt

M10 x 1.5
Torque Specification
36 ft-lbs (50 N·m)
Important Notes
Ensure tensioner is aligned correctly. This bolt holds the tensioner to the engine bracket.
2

Drive Belt Idler Pulley Bolt

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure idler pulley is aligned correctly. Proper torque is critical to prevent vibrations.

Sensors

1

Knock Sensor Bolt

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure sensor is mounted correctly. Proper torque is important for accurate sensor readings.
2

Crank Position Sensor Mounting Bolt

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Do not overtighten as it can affect sensor readings. Proper mounting is critical for accurate readings.

6hp Transmission

Torque specifications for 6hp Transmission

Transmission Mounting

1

Transmission Mounting Bolts

M12 x 1.75
Torque Specification
81 ft-lbs (110 N·m)
Important Notes
Ensure the transmission is properly aligned before tightening. These bolts should be tightened in a criss-cross pattern for even clamping force.

Oil Pan

1

Transmission Oil Pan Bolts

M6 x 1.0
Torque Specification
6.75 ft-lbs (9 N·m)
Important Notes
Do not overtighten. Over-tightening may damage the pan or cause leaks. Tighten the bolts in a criss-cross pattern.

Drain Fill Plugs

1

Transmission Drain and Fill Plugs

M18 x 1.5
Torque Specification
44 ft-lbs (60 N·m)
Important Notes
Ensure the sealing washer is in good condition and properly seated before tightening.

Mechatronic Unit

1

Mechatronic Unit Mounting Bolts

M6 x 1.0
Torque Specification
7.4 ft-lbs (10 N·m)
Important Notes
Tighten these bolts in a criss-cross pattern for even sealing. Do not over-tighten to avoid damaging the unit.

Bellhousing

1

Transmission Bellhousing Bolts (M10)

M10 x 1.5
Torque Specification
59 ft-lbs (80 N·m)
Important Notes
Tighten bolts evenly in a criss-cross pattern.
2

Transmission Bellhousing Bolts (M12)

M12 x 1.75
Torque Specification
81 ft-lbs (110 N·m)
Important Notes
Tighten bolts evenly in a criss-cross pattern. Verify bolt size before applying torque.

Valve Body

1

Valve Body Mounting Bolts

M6 x 1.0
Torque Specification
5.9 ft-lbs (8 N·m)
Important Notes
Ensure even clamping pressure by tightening in a cross pattern. Do not overtighten to avoid damage.

Oil Cooler Lines

1

Transmission Oil Cooler Line Fittings (Banjo Bolt)

M14 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Torque value is an estimate and can vary by fitting type, ensure new sealing washers are used and are correctly oriented. Verify the fitting type before applying torque.
2

Transmission Oil Cooler Line Fittings (Threaded Fitting)

M16 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Torque value is an estimate and can vary by fitting type, ensure new sealing washers are used and are correctly oriented. Verify the fitting type before applying torque.

Output Shaft

1

Transmission Output Shaft Flange Bolt (M10)

M10 x 1.5
Torque Specification
59 ft-lbs (80 N·m)
Important Notes
Ensure the flange is properly aligned to the output shaft before tightening.
2

Transmission Output Shaft Flange Bolt (M12)

M12 x 1.75
Torque Specification
81 ft-lbs (110 N·m)
Important Notes
Ensure the flange is properly aligned to the output shaft before tightening. Verify the bolt size before applying torque.

Body

Torque specifications for Body

Wheels And Tires

1

Wheel Lug Nuts

M12 x 1.5
Torque Specification
88 ft-lbs (120 N·m)
Important Notes
Tighten lug nuts in a star pattern. Over-tightening can damage studs or wheels.

Fuel System

1

Fuel Tank Strap Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure straps are properly aligned before tightening. Do not overtighten.
2

Fuel Filler Neck Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure the filler neck is correctly aligned. Use new seals where necessary. Estimated value.

Hood

1

Hood Hinge Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure proper hood alignment before final torque. Do not overtighten.

Exterior Panels

1

Fender Bolts/Screws

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure proper panel alignment before final torque. Use fender washers if required. Estimated value.
2

Bumper Mounting Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure bumper is aligned correctly before final tightening. Do not overtighten.

Doors

1

Door Hinge Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure proper door alignment before final torque. Do not overtighten.
2

Door Latch/Striker Bolts

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Adjust the striker position as needed to ensure proper door latching. Do not overtighten.

Lights

1

Headlight Mounting Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure headlight is correctly aligned before final torque. Estimated value.
2

Taillight Mounting Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure taillight is correctly aligned before final torque. Estimated value.

Interior

1

Seat Mounting Bolts

M10 x 1.5
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Ensure seats are properly positioned before tightening. Check seat belt operation after installation. Do not overtighten.
2

Interior Trim Panel Mounting Screws/Clips

N/A
Torque Specification
N/A
Important Notes
Hand-tighten screws until snug. Ensure clips are fully engaged. Overtightening can damage plastic panels.

Mirrors

1

Side Mirror Mounting Bolts/Nuts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure mirror is correctly positioned before final tightening. Estimated value.

Brakes

Torque specifications for Brakes

Caliper Mounting

1

Caliper Mounting Bolts

M12 x 1.5
Torque Specification
81 ft-lbs (110 N·m)
Important Notes
Secures the caliper directly to the caliper mounting bracket. Ensure bolts are clean and lightly lubricated with anti-seize compound.
2

Caliper Mounting Bracket Bolts

M14 x 1.5
Torque Specification
81 ft-lbs (110 N·m)
Important Notes
Secures the caliper mounting bracket to the steering knuckle or hub carrier. Ensure proper seating before tightening.

Caliper Components

1

Caliper Guide Pin Bolts

M8 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Secures the caliper guide pins, allowing the caliper to float properly. Ensure pins are lubricated with brake caliper grease.
2

Brake Pad Retaining Pin/Bolt

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Retains brake pads in the caliper. Torque to prevent loosening and ensure free pad movement. Estimated value.

Rotor Mounting

1

Brake Disc/Drum Retaining Bolts

M8 x 1.25
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Secures the brake rotor to the wheel hub. Ensure the rotor sits flush against the hub before tightening. Estimated value.

Hydraulic Components

1

Brake Hose Banjo Bolt

M10 x 1.0
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Secures the brake line to the caliper. Use new crush washers and torque properly to prevent leaks. Estimated value.
2

Brake Bleeder Screw

M7 x 1.0
Torque Specification
9 ft-lbs (12 N·m)
Important Notes
Torque to prevent leakage and damage. Do not over tighten. Estimated value.

Drivetrain

Torque specifications for Drivetrain

Engine Flywheel

1

Flywheel Bolts

M12 x 1.5
Torque Specification
52 ft-lbs (70 N·m)
Important Notes
Apply threadlocker. Tighten in a star pattern.
2

Clutch Pressure Plate Bolts

M8 x 1.25
Torque Specification
24 ft-lbs (33 N·m)
Important Notes
Tighten in a star pattern. Estimated value.
3

Automatic Transmission Flexplate Bolts

M12 x 1.5
Torque Specification
48 ft-lbs (65 N·m)
Important Notes
Apply threadlocker. Estimated Value

Transmission

1

Manual Transmission Bell Housing Bolts to Engine Block

M12 x 1.75
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Tighten evenly. Estimated value.
2

Transmission Mounting Bolts

M12 x 1.75
Torque Specification
81 ft-lbs (110 N·m)
Important Notes
Ensure proper transmission alignment before tightening.
3

Transmission Oil Pan Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (9 N·m)
Important Notes
Tighten in a criss-cross pattern to avoid warping the pan. Value converted from inch-lbs to ft-lbs.
4

Transmission Drain and Fill Plugs

M18 x 1.5
Torque Specification
44 ft-lbs (60 N·m)
Important Notes
Use a new sealing washer on plugs.

Driveshaft

1

Propeller/Drive Shaft Bolts

M10 x 1.5
Torque Specification
59 ft-lbs (80 N·m)
Important Notes
Apply threadlocker. Tighten evenly.
2

Driveshaft Center Support Bearing Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Tighten evenly. Estimated value.

Axles And Cv Joints

1

Drive Axle/Half Shaft Bolts

M10 x 1.5
Torque Specification
88 ft-lbs (120 N·m)
Important Notes
Tighten evenly.
2

CV Joint/Axle Nut

M24 x 1.5
Torque Specification
177 ft-lbs (240 N·m)
Important Notes
Use a new nut. Stake the nut after tightening.

Differential

1

Differential Mounting Bolts

M12 x 1.75
Torque Specification
81 ft-lbs (110 N·m)
Important Notes
Tighten evenly. Estimated value.
2

Differential Drain/Fill Plug

M18 x 1.5
Torque Specification
44 ft-lbs (60 N·m)
Important Notes
Use a new sealing washer on plugs.

Transfer Case

1

Transfer Case Drain/Fill Plug

M18 x 1.5
Torque Specification
44 ft-lbs (60 N·m)
Important Notes
Use a new sealing washer on plugs.

Electrical

Torque specifications for Electrical

Ignition System

1

Ignition Coil Mounting Bolt

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure the coil is seated properly before tightening. Over-torqueing can damage the coil or mounting point.

Starting System

1

Starter Motor Mounting Bolt

M10 x 1.5
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Ensure the starter motor is properly aligned with the flywheel housing before tightening. Proper torque ensures correct gear engagement and a solid electrical ground.

Charging System

1

Alternator Mounting Bolt

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure proper alignment of the alternator and bracket before tightening. Proper torque prevents vibration and belt misalignment.
2

Alternator B+ Terminal Nut

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
This is a high-current connection. Proper torque ensures a secure and low-resistance connection. Over-torqueing can damage the terminal.

Battery System

1

Battery Terminal Nut

M6 x 1.0
Torque Specification
5 ft-lbs (7 N·m)
Important Notes
Ensure proper cable terminal alignment before tightening. Over-torqueing can damage battery terminals.

Engine Management System

1

Engine Control Unit (ECU) Mounting Bolt

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure the ECU is seated properly and that bolts are not cross-threaded. Proper torque is essential for a secure and reliable connection.
2

Crankshaft Position Sensor Mounting Bolt

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure the sensor is seated correctly before tightening. Over-torqueing can damage the sensor.
3

Camshaft Position Sensor Mounting Bolt

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure the sensor is seated correctly before tightening. Over-torqueing can damage the sensor.
4

Knock Sensor Mounting Bolt

M8 x 1.25
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure the sensor is seated correctly before tightening. Over-torqueing can damage the sensor.

Body Electrical System

1

Body Ground Connection Bolt

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure the grounding point is clean and free from corrosion. Proper torque ensures a reliable ground connection. Value is estimated; torque may vary based on specific location and bolt size.
2

Fuse Box Mounting Bolt

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure the fuse box is properly aligned before tightening the mounting bolts. Proper torque ensures secure mounting and good ground contact.
3

Headlight Assembly Mounting Bolt

M5 x 0.8
Torque Specification
5 ft-lbs (7 N·m)
Important Notes
Do not over-torque these bolts to avoid damaging the plastic housing. Ensure proper alignment before tightening.
4

Taillight Assembly Mounting Bolt

M5 x 0.8
Torque Specification
5 ft-lbs (7 N·m)
Important Notes
Do not over-torque these bolts to avoid damaging the plastic housing. Ensure proper alignment before tightening.

Cooling System

1

Electric Fan Motor Mounting Bolt

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure the fan motor is seated correctly and that bolts are not cross-threaded. Proper torque prevents vibration and ensures proper functionality.

Abs System

1

ABS Module Mounting Bolt

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure the ABS module is seated correctly and that bolts are not cross-threaded. Proper torque is essential for module grounding and reliable ABS operation.

Emissions Sensors

Torque specifications for Emissions_sensors

Exhaust System

1

Exhaust Manifold/Headers to Cylinder Head Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure proper torque to prevent exhaust leaks near emissions sensors.
2

Exhaust Manifold/Headers Bolts (to exhaust system)

M10 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
These bolts connect the exhaust pipe to the exhaust manifold/headers.
3

Catalytic Converter to Exhaust Pipe Bolts

M10 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Proper torque prevents exhaust leaks that can affect sensor readings.
4

Muffler to Exhaust Pipe Bolts

M10 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Although downstream, leaks here can cause incorrect sensor readings.

Egr System

1

EGR Valve Mounting Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensures a proper seal between the EGR valve and intake manifold or cylinder head.

Air Intake System

1

Mass Air Flow (MAF) Sensor Mounting Bolts

M5 x 0.8
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Secures the MAF sensor to the air intake; prevents vacuum leaks.

Pcv System

1

PCV Valve Housing Bolts

M5 x 0.8
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Secures the PCV valve housing. Ensure proper seal.

Secondary Air Injection

1

Secondary Air Injection Pump Mounting Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensures secure mounting of the secondary air injection pump.

Evap System

1

EVAP Purge Valve Mounting Bolts

M5 x 0.8
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Secures the EVAP purge valve to the engine. Ensures proper operation of the system.

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
Tighten in a crisscross pattern to ensure even clamping pressure. Use new gaskets for proper sealing.
2

Exhaust Pipe to Exhaust Manifold/Header Bolts

M10 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure the exhaust pipe flange aligns correctly with the manifold. Use new gaskets for proper sealing.

Catalytic Converter

1

Catalytic Converter to Exhaust Pipe Bolts

M10 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Use new gaskets. Ensure the catalytic converter flange is properly aligned.

Exhaust Piping

1

Exhaust Flange Clamp Bolt

M8 x 1.25
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Estimated value. Torque based on clamp size and type. Ensure clamp is properly positioned to create an effective seal.
2

Muffler to Exhaust Pipe Bolts

M10 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Use new gaskets if applicable. Ensure the muffler is properly supported by its hangers before tightening.

Exhaust Hangers

1

Exhaust Hanger Bracket Bolts (to body/chassis)

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure the hangers are properly aligned and not stressed or twisted during installation. Check rubber mounts for wear or damage.

Sensors And Shields

1

Oxygen Sensor

M18 x 1.5
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Estimated value based on typical oxygen sensor. Check specific sensor documentation. Use anti-seize on threads. Do not over tighten.
2

Exhaust Heat Shield Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure heat shields are correctly aligned and do not interfere with other components. Do not over tighten. Often secured by small bolts and are susceptible to stripping.

Fuel

Torque specifications for Fuel

Fuel Rail

1

Fuel Rail Mounting Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure proper alignment before tightening. Use a cross-tightening pattern.
2

Fuel Injector Mounting Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Do not overtighten. Ensure injector o-rings are properly seated.
3

Fuel Pressure Regulator Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
This is an estimated value, verify with your repair manual. Ensure regulator o-ring is properly seated.

Fuel Pump

1

Fuel Pump Mounting Bolts

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Tighten evenly. Ensure proper gasket alignment to prevent leaks.
2

Fuel Tank Strap Bolts

M10 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Tighten evenly. Use caution when working with fuel tank components.
3

Fuel Tank Sending Unit/Sensor Mounting Bolts

M5 x 0.8
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Do not overtighten. Ensure proper sensor alignment and gasket condition.
4

Fuel Pump Access Cover Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Tighten evenly. Do not overtighten as these fasteners may be small or go into plastic.

Fuel Filter

1

Fuel Filter Mounting Bolt/Nut

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure filter is properly aligned and use proper washers if present.
2

Fuel Line Banjo Bolt

M12 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Estimated value, always verify using a repair manual for specific application. Replace crush washers. Do not overtighten.

Fuel Filler

1

Fuel Filler Neck Bolts

M6 x 1.0
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure proper alignment of the filler neck to prevent leaks. Check all seals and gaskets.

Hvac

Torque specifications for Hvac

Ac Compressor

1

A/C Compressor Mounting Bolts

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure bolts are clean and threads are in good condition before installation.

Ac Lines

1

A/C Line Fittings

Varies (M10 x 1.25 estimated)
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
This is a general torque spec. Actual torque may vary depending on fitting size and type. Ensure O-rings are in good condition and properly lubricated before connecting.

Blower Motor

1

Blower Motor Mounting Bolts/Screws

M5 x 0.8 (estimated)
Torque Specification
4 ft-lbs (6 N·m)
Important Notes
Torque value estimated, use caution when tightening into plastic housing. Use a low torque value to avoid damaging plastic housings.

Hvac Control Panel

1

HVAC Control Panel Mounting Screws/Bolts

M4 x 0.7 (estimated)
Torque Specification
2 ft-lbs (3 N·m)
Important Notes
Hand tight only, do not overtighten into plastic mounts. Torque is estimated.

Heater Core

1

Heater Core Inlet/Outlet Pipe Clamp Bolts/Screws

M5 x 0.8 (estimated)
Torque Specification
3 ft-lbs (4 N·m)
Important Notes
Estimated value, do not overtighten to avoid hose damage and coolant leaks. Ensure clamps are properly positioned before tightening.

Evaporator Housing

1

Evaporator Housing Bolts/Screws

M6 x 1.0 (estimated)
Torque Specification
5 ft-lbs (7 N·m)
Important Notes
Estimated value, use caution when tightening, ensure proper alignment before tightening.

Expansion Valve

1

Expansion Valve Mounting Bolts/Screws

M5 x 0.8 (estimated)
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Estimated value, ensure O-rings are correctly placed and lubricated prior to tightening to ensure a proper seal.

Ambient Temp Sensor

1

Ambient Temperature Sensor Mounting Screw

M3 x 0.5 (estimated)
Torque Specification
1.3 ft-lbs (1.8 N·m)
Important Notes
Estimated value, do not overtighten as the sensor is delicate.

Dashboard Support

1

Dashboard Support/Brace Bolts/Nuts

M8 x 1.25
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Use caution when tightening, ensure correct alignment to avoid vibration.

Suspension

Torque specifications for Suspension

Front Suspension

1

Strut Top Mount Nuts (to chassis)

M8 x 1.25
Torque Specification
34 ft-lbs (45 N·m)
Important Notes
These nuts secure the top of the strut assembly to the chassis. Use a cross-tightening sequence.
2

Strut/Shock Absorber Lower Mounting Bolt (to wheel carrier)

M12 x 1.5
Torque Specification
81 ft-lbs (110 N·m)
Important Notes
Secures the lower part of the strut/shock to the wheel carrier. Check for proper alignment before tightening.
3

Control Arm Mounting Bolts (to chassis and wheel carrier)

M12 x 1.5
Torque Specification
81 ft-lbs (110 N·m)
Important Notes
Secures the control arms to the chassis and wheel carrier. Tighten with the suspension at ride height.
4

Ball Joint Nut (to control arm or wheel carrier)

M12 x 1.5
Torque Specification
59 ft-lbs (80 N·m)
Important Notes
Secures the ball joint to the control arm or wheel carrier. Ensure the ball joint is properly seated before tightening.
5

Tie Rod End Nut (to steering knuckle/wheel carrier)

M10 x 1.25
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Fastens the tie rod end to the steering knuckle. Ensure the tie rod is correctly aligned.
6

Sway Bar Link Nut (to strut/shock or control arm)

M10 x 1.25
Torque Specification
44 ft-lbs (60 N·m)
Important Notes
Secures the sway bar link to the strut/shock absorber or control arm. Ensure proper alignment of the link before tightening.
7

Sway Bar Mounting Bracket Bolts (to chassis)

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Bolts that secure the sway bar mounting brackets to the chassis. Ensure the sway bar is correctly positioned in the bushings.
8

Wheel Speed Sensor Bolt (to wheel carrier)

M6 x 1
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Secures the ABS wheel speed sensor to the wheel carrier. Do not over tighten.

Rear Suspension

1

Rear Control Arm Eccentric Bolt/Nut (to chassis)

M12 x 1.5
Torque Specification
1. 59 ft-lbs (80 N·m) 2. 90°
Important Notes
Eccentric bolt and nut for rear wheel alignment. Use a new nut.
2

Rear Trailing Arm Bolt (to chassis)

M14 x 1.5
Torque Specification
1. 81 ft-lbs (110 N·m) 2. 90°
Important Notes
This bolt secures the rear trailing arm to the chassis. Torque to yield.
3

Rear Shock Lower Mount Bolt (to wheel carrier)

M12 x 1.5
Torque Specification
59 ft-lbs (80 N·m)
Important Notes
The lower bolt that attaches the shock absorber to the wheel carrier.

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 IS the torque specification for the cylinder head bolts on a 2005-2011 BMW 330i?

The torque specification for the cylinder head bolts IS 30 ft-lbs (41 Nm) for the first pass, then 60 ft-lbs (81 Nm) for the second pass, followed by a final torque of 90 ft-lbs (122 Nm).

Q2

What IS the recommended torque for the spark plugs on a 2005-2011 BMW 330i?

The recommended torque for the spark plugs IS 25 ft-lbs (34 Nm).

Q3

What type of torque wrench should I use for tightening bolts on a 2005-2011 BMW 330i?

It IS recommended to use a click-type torque wrench that IS properly calibrated and within the manufacturer's specified accuracy range.

Q4

Can I use a standard torque wrench to tighten bolts on my 2005-2011 BMW 330i?

While it IS possible to use a standard torque wrench, it IS important to note that click-type torque wrenches are more accurate and provide a tactile indication when the desired torque IS reached.

Q5

How often should I check the torque on critical bolts on my 2005-2011 BMW 330i?

Critical bolts, such as those on the engine and suspension, should be checked for proper torque periodically, especially after major maintenance or repairs.

Q6

What are the consequences of over-tightening bolts on my 2005-2011 BMW 330i?

Over-tightening bolts can lead to stripped threads, damaged components, and even safety hazards. It IS crucial to adhere to the specified torque values and use proper techniques.

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 330i.

  • 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

Cylinder Head Bolts Torque Specification

Technical procedure for tightening cylinder head bolts to correct torque specifications.

  • Clean and inspect cylinder head and bolts.
  • Apply a thin layer of engine oil to bolt threads.
  • Tighten bolts in three stages: 25 Nm, 50 Nm, 80 Nm.
  • Use a torque angle meter to rotate bolts an additional 90 degrees.
View full procedure

Connecting Rod Bolt Torque Specification

Technical procedure for tightening connecting rod bolts to correct torque specifications.

  • Clean and inspect connecting rod bolts and caps.
  • Apply a thin layer of assembly lube to bolt threads.
  • Tighten bolts in three stages: 20 Nm, 40 Nm, 60 Nm.
View full procedure

Main Bearing Cap Bolt Torque Specification

Technical procedure for tightening main bearing cap bolts to correct torque specifications.

  • Clean and inspect main bearing caps and bolts.
  • Apply a thin layer of engine oil to bolt threads.
  • Tighten bolts in two stages: 30 Nm, 60 Nm.
View full procedure

Suspension Component Torque Specifications: Nuts, Bolts, Screws

Technical procedure for tightening suspension components to correct torque specifications.

  • Consult torque specifications for specific suspension components.
  • Use a torque wrench and appropriate socket size.
  • Tighten nuts, bolts, and screws to the specified torque in a star pattern.
View full procedure

Brake Component Torque Specifications: Calipers, Rotors, Pads

Technical procedure for tightening brake components to correct torque specifications.

  • Consult torque specifications for specific brake components.
  • Use a torque wrench and appropriate socket size.
  • Tighten bolts, screws, and nuts to the specified torque in a star pattern.
View full procedure
Technical Service Bulletins

NTB17-005: Engine Noise Due to Loose Cylinder Head Bolts

2017-05-10

This bulletin addresses excessive engine noise caused by loose cylinder head bolts. It provides revised torque specifications and tightening procedures to resolve the issue.

2005-2011 330i

Resolution: Inspect cylinder head bolts and tighten to the revised torque specifications of 80 Nm + 90 degrees.

NTB19-012: Suspension Noise Due to Loose Control Arm Bolts

2019-07-15

This bulletin addresses excessive suspension noise caused by loose control arm bolts. It provides updated torque specifications and tightening procedures to rectify the problem.

2005-2011 330i

Resolution: Inspect control arm bolts and tighten to the revised torque specifications of 100 Nm + 45 degrees.

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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.
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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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