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Engine - Tightening Torques -- e90 BMW M3 E90

Mechanical ~324 words

11 61 Air intake manifold

TypeThreadTightening specificationMeasure
1AZ Manifold to throttle valvesS65Hose clampFollow installation instructions1 Nm
2AZ Gaiter to manifoldS65Hose clamp3.0 Nm

TIGHTENING TORQUE SPECIFICATION - AIR INTAKE MANIFOLD

12 31 Alternator

TypeThreadTightening specificationMeasure
1AZ B+ lead to alternatorS65M8 cover nut19 Nm

TIGHTENING TORQUE SPECIFICATION - ALTERNATOR

11 31 Camshaft

TypeThreadTightening specificationMeasure
1AZ Chain tensionerS65M26x1.5Insert screws dry65 Nm
2AZ Bearing pin to crankcase and both cylinder heads (sliding rail)S65M820 Nm
3AZ Bearing cap of camshafts to cylinder headS65M7x113 Nm

TIGHTENING TORQUE SPECIFICATION - CAMSHAFT

11 24 Connecting Rods and Bearings

TypeThreadTightening specificationMeasure
1AZ Connecting rod boltsS65M9x1Replace screws Screws washed and oiled 1. Jointing torque 2. Setting torque 3. Angle of rotation Important 4. Release connecting rod bolts. 5. Jointing torque 6. Setting torque 7. Angle of rotation Important 8. Release connecting rod bolts. 9. Jointing torque 10. Setting torque 11. Angle of rotation6 Nm 20 Nm 130° 6 Nm 20 Nm 130° 6 Nm 20 Nm 130°

TIGHTENING TORQUE SPECIFICATION - CONNECTING RODS AND BEARINGS

11 21 Crankshaft and Bearings

TypeThreadTightening specificationMeasure
1AZ Increment wheel on crankshaftS54M5 10.9Replace screws Jointing torque Torque angle5.0 Nm 45°
Increment wheel on crankshaftM5 10.9Replace screws13 Nm
Increment wheel on crankshaftM5 8.8Replace screws5.5 Nm

TIGHTENING TORQUE SPECIFICATION - CRANKSHAFT AND BEARINGS

11 12 Cylinder Head with Cover

TypeThreadTightening specificationMeasure
11AZ Cylinder head coverAllM610 Nm
AllM715 Nm
M21M815 Nm
12AZ Oil trap to cylinder head coverM21M817 Nm
13AZ Timing case to cylinder headAllM715 Nm
AllM820 Nm
14AZ Plug for oil channel (microencapsulated)M47/M57M12 x 1.520 Nm
15AZ Vent plugs to cylinder head (coolant)M672 Nm

TIGHTENING TORQUE SPECIFICATION - CYLINDER HEAD WITH COVER

TypeThreadTightening specificationMeasure
1AZ Cylinder head bolts (steel bolt)S65M10x1.5x110Replace screws Threads cleaned and oiled Jointing torque 1. Angle of rotation 2. Angle of rotation40 Nm 90° 90°
2AZ Bearing cap to cylinder headS65M7x1Replace screws Threads cleaned and oiled13 Nm
3AZ Screw plug for water jacket to cylinder head.S65M26x1.5Replace seal Threads cleaned and oiled50 Nm
4AZ Screw plug, chain rail to cylinder head.S65M22x1.5Threads cleaned and oiled30 Nm
5AZ Oil separator to cylinder headS65M6x16Replace aluminium screws/bolts 1. Jointing torque 2. Angle of rotation4 Nm 45°
6AZ Camshaft sensor to cylinder head coverS65M6x16Replace aluminium screws/bolts 1. Jointing torque 2. Angle of rotation4 Nm 45°
7AZ Lifting eye to cylinder headS65M8Threads cleaned and oiled15 Nm
8AZ Decoupling adapter screw to cylinder head cover.S65M66 Nm
9 AZ Cover plate, preliminary filter, to cylinder head coverS65Self-tapping screw7 Nm

TIGHTENING TORQUE SPECIFICATION - CYLINDER HEAD WITH COVER

11 28 Drive belt

TypeThreadTightening specificationMeasure
1AZ Idler pulley to oil filter housing, clockwise-rotating power steering pumpS65M10x6040 Nm
2AZ Idler pulley to oil filter housing, counterclockwise-rotating power steering pumpS65M10x100Jointing torque Torque angle15 Nm 70°

TIGHTENING TORQUE SPECIFICATION - DRIVE BELT

12 42 Electrical leads

TypeThreadTightening specificationMeasure
1AZ Jump-start connection point B+S65M819 Nm
2AZ Ground cable to engine carrierS65M819 Nm

TIGHTENING TORQUE SPECIFICATION - ELECTRICAL LEADS

11 78 Emissions control, control sensor/monitor sensor

TypeThreadTightening specificationMeasure
1AZ Control sensor/monitor sensorS65M18 x 1.550 Nm
2AZ Exhaust temperature sensorS65M14x1.525 Nm

TIGHTENING TORQUE SPECIFICATION - EMISSIONS CONTROL, CONTROL SENSOR/MONITOR SENSOR

11 78 Emissions control, control sensor/monitoring sensor

TypeThreadTightening specificationMeasure
1AZ Control sensor/monitoring sensorN74M18 x 1.550 Nm
2AZ Bracket, oxygen sensor, to cylinder head coverN74M610 Nm

TIGHTENING TORQUE SPECIFICATION - EMISSIONS CONTROL, CONTROL SENSOR/MONITORING SENSOR

11 78 Emissions-control, Lambda oxygen sensor

TypeThreadTightening specificationMeasure
1AZ Oxygen control sensor; oxygen monitor sensorAllM18 x 1.550 Nm

TIGHTENING TORQUE SPECIFICATION - EMISSIONS-CONTROL, LAMBDA OXYGEN SENSOR

11 11 Engine block

TypeThreadTightening specificationMeasure
1AZ New main bearing bolts (steel bolts 10.9)S65M11x115Threads cleaned and oiled IMPORTANT: Observe TIGHTENING SPECIFICATION . 1. Jointing torque 2. Angle of rotation 3. Release all main bearing bolts. 4. Jointing torque 5. Angle of rotation 6. Release all main bearing bolts. 7. Jointing torque 8. Angle of rotation30 Nm 130° 30 Nm 130° 30 Nm 130°
1AZ Old main bearing bolts (steel bolts 10.9)S65M11x115Threads cleaned and oiled IMPORTANT: Observe TIGHTENING SPECIFICATION . 1. Jointing torque 2. Angle of rotation30 Nm 130°
2AZ Fitting bolts (steel bolts 12.9)S65M9x97Threads cleaned and oiled IMPORTANT: Observe TIGHTENING SPECIFICATION . 1. Jointing torque 2. Jointing torque 3. Angle of rotation8 Nm 15 Nm 130°
3AZ Main bearing bolts (steel bolts 10.9)S65M8x65Threads cleaned and oiled Jointing torque Torque angle5 Nm 90°
4AZ Main bearing bolts (steel bolts 10.9)S65M8x40Threads cleaned and oiled Jointing torque Torque angle5 Nm 60°
5AZ Main bearing bolts (steel bolts 10.9)S65M6x30Threads cleaned and oiled Jointing torque15 Nm
6AZ Screw plug to crankcase, frontS65M22x1.5Replace seal30 Nm
7AZ Screw plug to crankcase, main oil galleryS65M16x1.5Replace seal30 Nm
8AZ Coolant drain plug to crankcaseS65M14x1.5Replace seal25 Nm
9AZ Screw plug to crankcase, frontS65M14x1.5Replace seal20 Nm
IMPORTANT
Observe TIGHTENING SPECIFICATION .
IMPORTANT
Observe TIGHTENING SPECIFICATION .
IMPORTANT
Observe TIGHTENING SPECIFICATION .

TIGHTENING TORQUE SPECIFICATION - ENGINE BLOCK

11 62 Exhaust manifold

TypeThreadTightening specificationMeasure
1AZ Exhaust manifold to cylinder head Coat screw connections with CRC copper pasteAllM6Replace nuts10 Nm
M50/M52/M52TU/M54/M56/S52/S50 USM7Replace nuts20 Nm
All/othersM7Replace nuts15 Nm
M10M8Upper row of staybolts installed with bolt cement23 Nm
M21M8Replace nuts Retighten after 2000 km Slacken nuts by a 1/4 turn12 Nm 12 Nm
M41/M47/M47TU/M51/M57/M57TUM8Replace nuts20 Nm
All/othersM8Replace nuts23 Nm

TIGHTENING TORQUE SPECIFICATION - EXHAUST MANIFOLD

11 52 Fan

TypeThreadTightening specificationMeasure
1AZ Fan clutch on water pump Coupling nut (left-hand threads)All40 Nm
M5445 Nm
2AZ Fan to fan clutchAll10 Nm

TIGHTENING TORQUE SPECIFICATION - FAN

13 71 Fixtures (S65)

TypeThreadTightening specificationMeasure
1AZ Cover, air intake mufflerS653 Nm

TIGHTENING TORQUE SPECIFICATION - FIXTURES (S65)

11 22 Flywheel

TypeThreadTightening specificationMeasure
1AZ DM flywheel to crankshaft (manual transmission)S65M12x1.5105 Nm

TIGHTENING TORQUE SPECIFICATION - FLYWHEEL

12 12 Ignition

TypeThreadTightening specificationMeasure
1AZ Spark plug in cylinder headS65M12x1.25Dry thread, cold engine23 Nm

TIGHTENING TORQUE SPECIFICATION - IGNITION

11 61 Intake manifold

TypeThreadTightening specificationMeasure
1AZ Intake manifold on cylinder headAllM822 Nm
AllM715 Nm
AllM610 Nm
2AZ Soundproofing hood to holderM60/1/M60/2/M62M68 Nm

TIGHTENING TORQUE SPECIFICATION - INTAKE MANIFOLD

11-42 Oil Filter and Lines

TypeThreadTightening specificationsDimension
1AZ Oil filter cover to oil filter housingS65WAF 24With or without automatic engine start-stop function (MSA)40 Nm
2AZ Oil filter housing to engine blockS65M610 Nm
3AZ Oil filter housing to engine blockS65M818 Nm

TIGHTENING TORQUE SPECIFICATION - OIL FILTER AND LINES

11 13 Oil Pan

TypeThreadTightening specificationMeasure
1AZ Oil drain plugS65M12 x 1.5Replace sealing ring25 Nm
2AZ Oil sump screwsS65M6x 30 M6x50 M6x7510 Nm

TIGHTENING TORQUE SPECIFICATION - OIL PAN

11 41 Oil Pump with Strainer and Drive

TypeThreadTightening specificationMeasure
1AZ Sprocket to oil pumpS65M10x1Replace nut25 Nm
2AZ Oil pump to crankcaseS65M822 Nm
3AZ Oil return pump to crankcaseS65M610 Nm

TIGHTENING TORQUE SPECIFICATION - OIL PUMP WITH STRAINER AND DRIVE

13 41 Pressure sensors (S65)

TypeThreadTightening specificationMeasure
1AZ Pressure sensor to idle air stripS65D5x123 Nm

TIGHTENING TORQUE SPECIFICATION - PRESSURE SENSORS (S65)

13 62 Sensors (S65)

TypeThreadTightening specificationMeasure
1AZ Coolant temperature sensorS65M12x1.514 Nm
2AZ Oil pressure switchS65M12x1.527 Nm
3AZ Oil condition sensorS65M61. Initial tightening2 Nm
2. Final tightening9 Nm
4AZ Spacer, el. throttle valve actuator to crankcaseS65M6Microencapsulation8 Nm
5AZ Camshaft sensor to cylinder head coverS65M6x16 AL1. Jointing torque4 Nm
2. Angle of rotation45°

TIGHTENING TORQUE SPECIFICATION - SENSORS (S65)

12 41 Starter

TypeThreadTightening specificationMeasure
1AZ B+ lead to starter term. 30S65M8 nut14 Nm
2AZ Starter to transmission housingS65M1042 Nm

TIGHTENING TORQUE SPECIFICATION - STARTER

13 54 Throttle valve actuation (S65)

TypeThreadTightening specificationMeasure
1AZ Actuating lever to actuating shaftS65M5 10.9Use screws and nuts only once7 Nm

TIGHTENING TORQUE SPECIFICATION - THROTTLE VALVE ACTUATION (S65)

11 36 Variable Camshaft Control

TypeThreadTightening specificationMeasure
1AZ VANOS to inlet and exhaust camshafts Observe REPAIR INSTRUCTION .S65M12x1Attention! Left-hand thread. Replace screws Screws oiled at threads and heads 1. Jointing torque 2. Setting torque 3. Angle of rotation Important 4. Release screws. 5. Jointing torque 10° before TDC. 6. Jointing torque TDC. 7. Setting torque 8. Angle of rotation20 Nm 80 Nm 200° 10 Nm 20 Nm 80 Nm 200°
2AZ Non-return valveS65M14 x 1.515 Nm

TIGHTENING TORQUE SPECIFICATION - VARIABLE CAMSHAFT CONTROL

11 23 Vibration Damper

TypeThreadTightening specificationMeasure
1AZ Torsion damper to crankshaft hubS65M12x1.25 12.9Jointing torque 1st angle of rotation 2. Angle of rotation60 Nm 40° 40°

TIGHTENING TORQUE SPECIFICATION - VIBRATION DAMPER

See also:
• REPAIR INSTRUCTION

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