Powertrain Engines
Valve Timing
• For verifying or adjusting the valve timing of the gear drive the timing marks have to be
aligned as shown below (refer to the workshop manual for details).
• All helical gears except for the fuel high-pressure pump gear have a punch mark as
timing mark. However, the punch marks on the crankshaft gear and on the fuel-high-
pressure pump gear can only be seen when the friction gears are removed.
NOTE: The timing mark of each gear can be aligned easily, if paint is applied to the punch
marks.
L1001.4_01082
1 Fuel high-pressure pump gear 5 Balancer shaft gear
2 View A 6 Crankshaft gear
3 Timing mark 7 Idler gear no.1
4 Idler gear no.3 8 Idler gear no.2
Curriculum Training 01-87
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