Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

2021 BMW M3 Base, Automatic TransFACTORY OEM SERVICE PROCEDURE

Engine -- Tightening Torques M3 (G80)

Select a section or procedure below to view factory instructions:

11 00 ENGINE, GENERAL (M3 base, M3 Competition, M3 Competition M xDrive, M3 CS)11 11 MAIN BEARING CAP (M3 base, M3 Competition, M3 Competition M xDrive, M3 CS)11 12 CYLINDER HEAD (M3 base, M3 Competition, M3 Competition M xDrive, M3 CS)11 13 ENGINE OIL PAN (M3 base, M3 Competition, M3 Competition M xDrive, M3 CS)11 14 REAR TIMING CASE COVER (M3 base, M3 Competition, M3 Competition M xDrive, M3 CS)11 21 CRANKSHAFT INCREMENT WHEEL (M3 base, M3 Competition, M3 Competition M xDrive, M3 CS)11 22 FLYWHEEL (M3 base, M3 Competition, M3 Competition M xDrive, M3 CS)11 23 ENGINE VIBRATION DAMPER (M3 base, M3 Competition, M3 Competition M xDrive, M3 CS)11 24 CONNECTING ROD BEARING CAP (M3 base, M3 Competition, M3 Competition M xDrive, M3 CS)11 28 IDLER PULLEY (M3 base, M3 Competition, M3 Competition M xDrive, M3 CS)11 30 SPECIAL TOOL FOR CAMSHAFT ALIGNMENT (M3 base, M3 Competition, M3 Competition M xDrive, M3 CS)11 31 CAMSHAFTS, TIMING CHAIN TENSIONER (M3 base, M3 Competition, M3 Competition M xDrive, M3 CS)11 36 VARIABLE VALVE TIMING CONTROL SYSTEM (VANOS) (M3 base, M3 Competition, M3 Competition M xDrive, M3 CS)11 37 VARIABLE VALVE LIFT CONTROL SYSTEM (VALVETRONIC) (M3 base, M3 Competition, M3 Competition M xDrive, M3 CS)11 41 ENGINE OIL PUMP (M3 base, M3 Competition, M3 Competition M xDrive, M3 CS)11 42 ENGINE OIL FILTER, TURBOCHARER OIL LINES, PISTON COOLING CONTROL VALVE (M3 base, M3 Competition, M3 Competition M xDrive, M3 CS)11 51 ENGINE WATER PUMP (M3 base, M3 Competition, M3 Competition M xDrive, M3 CS)11 52 RADIATOR FAN CLUTCH (M3 base, M3 Competition, M3 Competition M xDrive, M3 CS)11 53 THERMOSTAT, COOLANT LINES (M3 base, M3 Competition, M3 Competition M xDrive, M3 CS)11 61 INTAKE MANIFOLD, THROTTLE BODY (M3 base, M3 Competition, M3 Competition M xDrive, M3 CS)11 65 TURBOCHARGER (M3 base, M3 Competition, M3 Competition M xDrive, M3 CS)

Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.

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