Porsche 928 Workshop Manual page 262

928
Engine/Cylinder Head, Valve Drive
15
4.Turn crankshaft until cylinder
No. 6 is at 20" after TDC.
5.Block camshaft gears by instal-
ling 3 M 5 x 15 auxiliary bolts
then tightening M 10 bolt to
65 Nm (47 ftlb).
6.Turn crankshaft through 2 more
revolutions and recheck setting.
Specified value: 1.6 + 0.1 mm,
cylinder No. 6 20" after TDC.
Readjust if necessary.
7.Once adjustment is completed,
unscrew and remove temporary M 5
x 15 bolt.
Cylinder bank 5-8
8.Turn crankshaft until cylinder
No. 6 is at TDC and check set-
tings of cylinder bank 5-8 as
described above (cylinder bank
l-4). Specified value 2.0 +
0.1 mm, cylinder No. 1 20" after
TDC.
CHECKING AND ADJUSTING CAMSHAFT
SETTING
87 MODELS ONWARD
ENGINE TYPE M 28. 41/42
Note:
Installation of new camshafts in
type M 28. 41/42 engines as of
model year 87 has changed the valve
timing. The new camshafts are
recognizable because they have no
rear journals.
Adjusting
Cylinder bank l-4
Testing and adjusting specifi-
cation: 1.8 +
0.1
mm
-
Cylinder bank 5-8
Testing and adjusting specifi-
cation: 2.0 + 0.1 mm
-
Adjustment of the camshafts
follows the same sequence as
described on p. 15 - 134.
Printed in Germany
- XIII,
1986 Checking and Adjusting Camshaft 15 - 135
Setting