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Home/BMW/Z4/BMW Z4 E85/E86 (2002-2005)/Repair manual/Gauges & Instrument Panels/Engine Electrical System - Tightening Torques
Contents Wiring diagrams Section: Gauges & Instrument Panels All sections

Engine Electrical System - Tightening Torques BMW Z4 E85/E86

Gauges & Instrument Panels ~129 words

12 12 Spark Plugs

ApplicationTypeThreadMeasure
1AZ Spark plugs (ungreased)AllM12x1.2523 +/-3 Nm
AllM14x1.2530 +/-3 Nm

12 12 SPARK PLUGS TIGHTENING SPECIFICATION

12 14 Electronic Shift Units or Control Units

ApplicationTypeThreadTightening specificationMeasure
1AZ TCI control unitAll2.5 Nm
2AZ Knock sensorE2313 Nm
All20 Nm
3AZ Engine speed and reference mark sensorAllM6Replace microencapsulated screw10 Nm
4AZ Cover on control unit boxAll4.4 Nm

12 14 ELECTRONIC SHIFT UNITS OR CONTROL UNITS TIGHTENING SPECIFICATION

12 31 Alternator with Drive and Mounting Parts

ApplicationTypeThreadMeasure
1AZ Wires to alternator
Terminal D+M10 / M205 Nm
All / othersM67 Nm
Terminal B+S38 / B388 Nm
All / othersM813 Nm
2AZ PulleyAll45 Nm
3AZ Pulley (ribbed drive belt)Alternator with cooling jacket80 Nm
All others70 Nm
N42, N46 Valeo75 Nm
N42, N46 Bosch65 Nm
4AZ Rear holderAll3.5 Nm
5AZ Fillister head screw for wire holderAll3.5 Nm
6AZ Alternator on bearing blockM40/M42 / M43 / M4443 Nm
7AZ Alternator to crankcaseN42, N46, N62M821 Nm
8AZ Belt pulley (ribbed V-belt) with freewheel (Ina) fitted to Bosch and Valeo alternatorsN4280 Nm

12 31 ALTERNATOR WITH DRIVE AND MOUNTING PARTS TIGHTENING SPECIFICATION

12 32 Governor

ApplicationTypeThreadValue
1AZ Regulator switchAllM42 Nm
AllM54 Nm

12 32 GOVERNOR TIGHTENING SPECIFICATION

12 41 Starter and Mounting Parts

ApplicationTypeThreadMeasure
1AZ Starter motor mounting to transmission bell housingAll45 Nm
2AZ Support to starterAllM55 Nm
3AZ Support to crankcaseAll47 Nm
4AZ Electrical leads to starterAllM55 Nm
AllM67 Nm
AllM813 Nm
5AZ Bolt connection, pole tubeAllM66 Nm
6AZ Heat shield to starter motorM66 Nm

12 41 STARTER AND MOUNTING PARTS TIGHTENING SPECIFICATION

12 42 Wires to starter

ApplicationTypeThreadMeasure
1AZ Battery positive connection point in/at distributorE32 / E34 / E31 / E36 / E46 / E87M820 Nm
E39 / M57M811 Nm
E38 / M67M811 Nm
E46 / M47TUM811 Nm
E60 / N62M815 Nm
E65 / N62 / N73M815 Nm
2AZ Wiring harness on distributorE36 / M41M810 Nm

12 42 WIRES TO STARTER TIGHTENING SPECIFICATION

12 51 Engine wiring harness

ApplicationTypeThreadMeasure
1AZ Wiring harness on electrical cutout deviceM51 / M41M52.5 Nm
2AZ Wiring harness on distributorE36 / M41M810 Nm
3AZ Battery positive terminal to intake manifoldM57M87 Nm
4AZ Battery positive terminal in engine compartmentM62 / S62M810 Nm
M57 / M67M810 Nm
M54M821 Nm
5AZ Wiring harness to ground holderM67M610 Nm
M47TUM67 Nm
6AZ DDE wiring harness pick-off to battery positive terminalM47TU / M57TU / M67M69 Nm
7AZ Injector guide strip to cylinder head coverM47TU / M57TU3.5 Nm

12 51 ENGINE WIRING HARNESS TIGHTENING SPECIFICATION

12 61 Oil pressure, oil temperature, oil level display

ApplicationTypeThreadTightening specificationMeasure
1AZ Oil-pressure switch/oil - temperature switchAllM12x1.527 Nm
2AZ Level switch for engine oilN62 / N73 / M67TUJointing torque 2 Nm8.5 Nm

12 61 OIL PRESSURE, OIL TEMPERATURE, OIL LEVEL DISPLAY TIGHTENING SPECIFICATION

12 62 Coolant Temperature

ApplicationTypeThreadMeasure
1AZ Temperature sensor to water flange (glow time/coolant temperature gauge)M2118 Nm
M5113 Nm
2AZ Temperature switch (5.5 °C / 17 °C) to fuel filter/cylinder headM2118 Nm
3AZ Coolant temperature sensor (2 -pin plug-in connection)S38 / S5013 Nm
All / others20 Nm
4AZ Remote thermometer sensor (2- pin plug -in connection)All20 Nm
Remote thermometer sensor (4- pin plug -in connection)M6216 Nm
S62M12 x 1.514 Nm
5AZ Remote thermometer sensor on coolant flangeS5018 Nm
6AZ Temperature sensor - airS38 / S5013 Nm
7AZ Temperature sensor - oilS38 / S5013 Nm

12 62 COOLANT TEMPERATURE SENSORS TIGHTENING SPECIFICATION

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