Porsche 928 Workshop Manual page 235

928
Engine/Cylinder Head, Valves
15
4.Valve reseating tool, e.g.
Hunger VDSNL l/45 I.K.
5.After the valve seats have been
machined, use a grinding paste to
lightly grind in valve seats.
Check contact pattern of valve
seat surface.
VALVE DIMENSIONS
VALVE DIMENSIONS 928 S
'85/'86 MODELS ONWARD
ENGINE TYPE M 28. 43/44/45/46
Dim.
Intake Exhaust
a
35
mm 32 mm
b
6.97 mm 6.94
mm
C
112.2
mm 111.2
mm
a 45O
45O
VALVE DIMENSIONS 928 S
'87 MODELS ONWARD
ENGINE TYPE M.28 41/42
Dim.
a
b
C
a
I
Intake
37 mm
6.97 mm
114.7 mm
45"
Exhaust
33 mm
6.94 mm
113.7 mm
45O
Printed in Germany-XIX,1987
Checking and Remachining
Valve Seats
Valve Dimensions
15 - 115