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 top surface of cylinder head (illustration shows a 4-valve head).
- Calculate maximum permissible reworking dimension from measured distance and minimum dimension.
CALCULATE MAXIMUM PERMISSIBLE VALVE SEAT REWORKING DIMENSION
| Minimum dimensions | ||
|---|---|---|
| Outer inlet valve | Center inlet valve | Exhaust valve |
| 32.2 mm | 33.2 mm | 33.0 mm |
Measured distance minus minimum dimension = maximum permissible reworking dimension.
CALCULATE MAXIMUM PERMISSIBLE VALVE SEAT REWORKING DIMENSION (EXAMPLE)
| Center inlet valve | Dimension |
|---|---|
| Measured distance | 33.0 mm |
| Minimum dimension | -32.2 mm |
| Maximum permissible reworking dimension | = 0.8 mm |
NOTE:
If the measured distance is less than the minimum dimension, repeat the measurement with new valves, or replace cylinder head.