The maximum permissible refacing dimension is calculated as follows:
WARNING: This page is about a different variant/trim than selected.
- Insert valve and press firmly against seat.
NOTE:
- If the valve is to be replaced as part of a repair, use a new valve for the calculation.
- Measure gap - a - vertically between tip of valve stem end and upper edge of cylinder head - 1 -.
- Calculate max. permissible refacing dimension from measured distance and minimum dimension.
Minimum dimensions: Outer intake valve 34.0 mm, center intake valve 33.7 mm, exhaust valve 34.4 mm
Measured distance minus minimum dimension = max. permissible reworking dimension.
Example:
| Measured distance | 34.4 mm | |
| - | Minimum dimension | 34.0 mm |
| = | max. perm. rework dimension * See note | 0.4 mm |
* Maximum allowable refacing dimension is represented in illustrations for refacing valve seats as dimension "b".