Porsche 944 User Manual
Page 108
15
Engine, Cylinder Head and Valve Drive
944
5. Using a depth gauge, measure from the
top surface of the valve-spring seat,
vertically downwards through the recess
to the outer spring contact surface.
86/930
Installation length
Inlet valve
Exhaust valve
38.0 + 0.5 mm
37.0 + 0.5 mm
6. The installation length can be adjusted
using shims.
7. The valves must not be mixed up again
after measurement.
Valve spring, Model 89 onward
Engine type M 44.41 (3.0 l)
Note
A new type of valve spring has been
installed
in engine type M 44.41 (3.0 l) from Model 89
onward. The installation length remains
unchanged.
Installation lengths
Inlet valve
Exhaust valve
38.0 + 0.5 mm
37.0 + 0.5 mm
Carry out working procedure Checking and
adjusting installation length of valve springs
as described on Page 15 - 133.
15 - 134
Checking and adjusting installation length of valve springs
Printed in Germany - XIX, 1989