Contents Wiring diagrams Section: Cooling System (mechanical) All sections

Cooling System - Tightening Torques BMW M3 E46

17 00 Coolant

TypeThreadTightening specificationMeasure
1AZ Coolant hoses 32...48 mm dia.All2.5 Nm
2AZ Bleeder screw (8 mm wrench size) on thermostat housingAll, without E468 Nm
Plastic vent screws on coolant linesE462-0.5/+1 Nm
3AZ Level switch (30 mm wrench size) to coolant expansion tankAll3 Nm

COOLANT TIGHTENING TORQUE SPECIFICATIONS

17 11 Radiator and Mounting Parts

TypeThreadTightening specificationMeasure
1AZ Radiator to body
Self-tapping screwAllB6.39 Nm
AllM610 Nm
2AZ Drain plug to radiatorAll2.5 Nm
3AZ Temperature switch to radiator (91 °C / 99 °C) max.All15 Nm
4AZ Expansion tank to bodyAll9 Nm
M57TU / E654 Nm
5AZ Radiator on module carrierE464 + 1 Nm
6AZ Retaining plate, expansion tank, to radiatorE464 + 1 Nm
7AZ Fan cowl on radiatorE464 + 1 Nm
8AZ Plug in radiator (temperature switch omitted)E36/7 / M54M14 x 1.515 Nm
9AZ Mounting plate to radiatorM57TU / E654.5 Nm
10AZ Radiator bracketAll2.5 Nm

RADIATOR AND MOUNTING PARTS TIGHTENING TORQUE SPECIFICATIONS

17 21 Engine Oil Cooler

TypeThreadTightening specificationMeasure
1AZ Engine oil cooler to bodyAll14 Nm
Oil cooler vapor extraction guide to trim panelE36 / M3B4.84 Nm

ENGINE OIL COOLER TIGHTENING TORQUE SPECIFICATIONS

17 40 Additional Fan (electric)

TypeThreadTightening specificationMeasure
1AZ Electric auxiliary fan on fan cowlE466 Nm
2AZ Electronics for auxiliary fan on fan cowlE466 Nm

ADDITIONAL FAN TIGHTENING TORQUE SPECIFICATIONS

17 22 Oil Cooler Pipes

TypeThreadTightening specificationMeasure
1AZ Pipes to engine oil coolerAll28 Nm
2AZ Pipes to oil filter headE36 / M325 Nm
3AZ Holder on oil cooler pipesAll6 Nm
4AZ Holder for oil cooler pipes to alternatorE36 / M3M610 Nm

OIL COOLER PIPES TIGHTENING TORQUE SPECIFICATIONS

TypeThreadTightening specificationMeasure
5AZ Cap nut on transmission oil cooler (on radiator) and on transmissionAllM18 x 1.520 Nm
5HP30M22 x 1.528 Nm
6AZ Oil lines on transmission
Hollow boltAllM16 x 1.537 Nm
7AZ Oil lines on transmission oil coolerA 5 S 300 J28 Nm
Hollow boltAllM14 x 1.527 Nm
8AZ Screw-in fitting on transmissionAllM14 x 1.5 und M16x1.537 Nm
9AZ Oil hose on oil pipeE2328 Nm
10AZ Oil pipe bracket on radiatorE232 Nm
11AZ Oil pipe bracket on bodyE236.5 Nm
12AZ Oil cooler on transmission5HP3010 Nm
13AZ Transmission oil cooler line to transmissionN42M821 Nm

OIL COOLER PIPES TIGHTENING TORQUE SPECIFICATIONS