Maximum permissible refacing dimension, calculating
WARNING: This page is about a different car, the 1999 Volkswagen Jetta, 1998 Volkswagen Jetta, 1997 Volkswagen Jetta, 1996 Volkswagen Passat, and 1996 Volkswagen Jetta. However, it is still accessible from the selected car via links, so may be relevant.
- Insert valve and press firmly against seat.
NOTE:
If the valve is to be replaced as part of a repair, use the new valve for the calculation.
- Measure distance -a- between end of valve stem and upper edge of cylinder head.
- Calculate maximum permissible refacing dimension from measured distance -a- and minimum dimension. See Fig 1.
Minimum dimension:
- Intake valve 35.8 mm (1.409 in.)
- Exhaust valve 36.1 mm (1.421 in.)
Measured distance minus minimum dimension equals maximum permissible refacing dimension.
Example (intake valve)
Measured distance -a- 36.5 mm (1.437 in.). See Fig 1.
- - Minimum dimension 35.8 mm (1.409 in.)
- = Maximum refacing dimension 0.7 mm (0.028 in.)