944 S L4-2479cc 2.5L DOHC (1987)
If, upon inspection, the hydraulic valve lifter is found to be disassembled, the exhaust valve may have seized. If it is suspected that a valve may have
seized, the following parts must be replaced:
-
exhaust valve
-
valve stem seal
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hydraulic lifter
-
valve spring set
-
upper spring retainer
-
valve keepers
The new version parts may be used for repairs, on 1988 Turbo S and 1989 Turbo only Old type exhaust valves and stem seals may be used in earlier
model engines until stock is depleted. Afterwards, new version parts may be used to repair older engines.
New and former version stem seals can be used on old type exhaust valves. However, old type stem seals may NOT be used together with new version
exhaust valves.