Tightening specifications for cylinder head

1st stage 20Nm(15)

2nd stage 90° turn

3rd stage 90° turn

Note

When fitting the hex. head bolts and washers, no lubricant must be used. Only the threads of the hex. head bolts must be lightly coated with engine oil.

Engine type

Right camshaft Cylinder bank 1 ...4 Intake shaft Exhaust shaft

Identification on rear end surface

Left camshaft Cylinder bank5...8 Intake shaft Exhaust shaft

Identification on rear end surface

Valve timing 1mm stroke, zero play

Intake opens Intake closes Exhaust opens Exhaust closes

Worldwide as of Model 90

928 S4 M 28.42

Worldwide Worldwide as of Model 90 as of Model 92

928 GT M 28.47

928.105.271.00 928.105.273.00

271.00 273.00

928.105.271.01 928.105.273.01

271.01 273.01

928.105.271.03 928.105.273.03

271.03 273.03

928.105.272.00 928.105.274.00

272.00 274.00

928.105.272.01 928.105.274.01

272.01 274.01

928.105.272.03 928.105.274.03

272.03 274.03

11° CA after TDC 3' CA after TDC 13° CA after TDC 36° CA after BDC 42° CA after BDC 61 ° CA after BDC 17° CA before BDC 30° CA before BDC28° CAbef. BDC 2° CA before TDC 5° CA before TDC12° CA bef. TDC

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