Installing Camshaft Drive Belt And Adjusting Timing - Porsche 928 Workshop Manual

15
Engine/Cylinder Head, Valves
928
INSTALLING CAMSHAFT DRIVE BELT AND ADJUSTING TIMING
Note :
Make sure new drive belts are retightened after driving car approx. 1,000 km
Installing Camshaft Drive Belt
1. Line up TDC mark on vibration damper with red
indicator on cover by turning crankshaft clock-
wise.
Note:
Vibration damper must be removed again for instal-
lation of the camshaft drive belt afterwards.
2. Turn both camshafts until notches in both camshaft
sprockets are aligned with marks cast on the camshaft
bearing caps.
Install camshaft drive belt, always pre-loaded by
hand, in the following order.
First on sprocket (11. oil pumpsprocket (2).
then over sprocket (31 of left camshaft (cyl. 5
through 8). bottom of water pump sprocket (4)
and on sprocket (51 of cyl. 1 through 4. and
finally over camshaft drive belt tensioning roller
(6).
Note:
Should the teeth of a hand-tightened camshaft drive
belt not match the sprocket pitch accurafelv
enough, turn pertinent camshaft sprocket counter-
clockwise carefully until teeth match.
15.14
Installing Camshaft Drive Belt and Adjusting Timing
VII, 1983 - Printed in Germany