Boxster S (987) F6-3.4L (2008)
Tool for fixing valve position
1. Fit special tool retaining device 9739 in cylinder head (valve stem side). To do this, screw in the fastening screws by hand into the spark plug
thread.
Special tool 9739 fitted
Information
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The permitted valve tilt play is 0.25 mm.
2. Check valve tilt play on intake valve. Adjust the dial gauge to the relevant angle of the valve to be checked and set to '0' with preload. Press valve
disc towards dial gauge and pull it back again. Read off value and note it.
Checking valve tilt play of intake valve
3. Check valve tilt play on exhaust valve. Adjust the dial gauge to the relevant angle of the valve to be checked and set to '0' with preload. Press valve
disc towards dial gauge and pull it back again. Read off value and note it.