Removing And Installing Cylin- Der Head - Porsche 924 Workshop Manual

15
Engine
I
Cylinder Head, Valves
REMOVING AND INSTALLING CYLIN-
DER HEAD
T he cylinder head can be taken off without
removing the engine.
The engine block has 2 centering bushings to
facilitate installation of head.
See figure for tightening sequence .
Opposite sequence for loosening.
Torque specifications:
warm: 120 Nm (86 ft lb)
cold: 100
N m (72
ft lb)
Note
If the cylinder head was removed, the cylinder
head bolts must be retorqued after about 1000
miles/ 1600 km.
Warm up engine.
Using loosening sequence, loosen cylinder head
bolts about 30° and retorque one at a time to
120 Nm(86 ft lb).
15 - 4
Removing and Installing Cylinder Head
REMOVING AN D INS T ALLING CYL IN DER
HEAD (fro m 1 9 80 Model )
Idencificacion:
Polygon sacker head bolts for cylinder head.
The cylinder head can be caken off withouc re-
moving the engine.
The engine block has 2 centering bushings co
facilirare insrallation of head.
T ightening Cylinder Head Bolts
Requirement: engine cold.
•
See figure for tightening sequence.
Opposite sequence for loosening.
1. Lubricate threads of cylinder head bolts with oil
slightly and tighten boles in specified sequence
to
65
Nm
(47
fr lb).
2. Mark position of cylinder head bolts.
3. Tighten cylinder head bolts 180 degrees
(1/2 tum) in specified sequence.
Nore
The cylinder head bolts do not have to be re-
tighrened after inscallarion.
Printed in Germany
Removing and Installing Cylinder Head (1980 Model)