Cabrio GLX L4-2.0L (ABA) (2001)
Valve Seat: Service and Repair
Valve seats, refacing
CAUTION!
- When refacing valve seats, remove only enough material to produce the correct seat contact pattern. The maximum permissible refacing dimension
must be calculated before refacing.
- If the maximum refacing dimension is exceeded, the hydraulic lifters will not function properly and the cylinder head must be replaced.
Calculating maximum permissible reworking dimension
-
Insert valve and push firmly against valve seat.
-
Measure distance -a- between center of valve stem and upper edge of cylinder head.
- Measured distance minus the minimum dimension is the maximum permissible refacing dimension.
Minimum dimensions:
- Intake valve: 33.8 mm (1.330 in.)
- Exhaustvalve: 34.1 mm (1.342 in.)
Example:
Note:
- If the measured distance -a- is smaller than the minimum dimension, measure again with new valves. If necessary, use shorter valves, or replace
cylinder head.