Checking The Valve Clearance
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NOTE:
Measurements should only be taken on a cold engine. A suitable temperature is approximately 20 °C.
Use feeler gauge 9995752 .
Press with a finger so that the feeler gauge lies parallel to the upper side of the tappet (see illustration).
Move the feeler gauge sideways when taking the reading in order to obtain as accurate a measurement as possible.
The valve clearance measured on cold engines (approximately 20 °C) should be:
| Inlet valve:0.20 0.03 mm. |
| Exhaust valve:0.40 0.03 mm. |
NOTE:
The tolerances are less when setting When checking the valve clearance through the plug hole, the tolerances are larger.
Differences in valve clearance for different engines / ambient temperatures:
| - 0.01 mm at 15 °C |
| + 0.01 mm at 25 °C |
| + 0.02 mm at 30 °C |
| + 0.03 mm at 35 °C |
| + 0.04 mm at 45 °C |