Calculating maximum permissible reworking dimension
- Insert valve and press firmly against valve seat.
NOTE:
If the valve is to be replaced as part of a repair, use a new valve for the calculation.
- Measure distance between end of valve stem and central axis of camshaft. (Central axis of camshaft is level with top of cylinder head.)
- Calculate max. permissible reworking dimension from measured distance and minimum dimension.
| Minimum dimensions | ||
| Outer intake valves | Central intake valve | Exhaust valves |
| 34.0 mm | 33.7 mm | 34.4 mm |
Measured distance minus minimum dimension = max. permissible reworking dimension.
| Example (for outer intake valve): | |||
| Measured distance | 34.4 mm | ||
| - | Minimum dimension | - 34.0 mm | |
| = | Max. permissible reworking dimension 1) | = 0.4 mm | |
*) The maximum permissible reworking dimension is shown in the illustration under Reworking valve seats as dimension "b".
NOTE:
If the maximum permissible reworking dimension is 0 mm or less than 0 mm, repeat the measurement with a new valve. If the measured result is again 0 mm or less than 0 mm, replace the cylinder head.