Intake valve Exhaust valve
Example: 928 Models 1980
Special Tool 9138 shows 38.6 mm. In this case install one more 0.5 mm shim.
Remove and install valve springs with P 200
Remove and install valve springs with US 1020 (only applicable for USA}.
Example: 928 S (Exhaust Valve)
Special Tool 9138 shows 38.6 mm. In this case install additional 1.0 mm shims.
15 - 8 b Disassembling and Assembling Valve Drive
VII, 1983 - Printed in Germany
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