α | Valve seat angle |
b | Valve seat width |
γ | Correction angle |
P01.30-2076-06
| Remove | ||
1 | Remove valves | ||
| Check | ||
2 | Check valve guides | Worn or damaged valve guides must be replaced. | |
Edit | |||
3 | Machine valve seats | Pay attention to operating instructions from the tool manufacturer; observe dimensions according to test and adjustment values. | |
Width of valve seat (b) | |||
Valve seat angle (α) | |||
Correction angle (γ) | |||
Radial runout of valve seat | |||
| Check | ||
4 | Measure valve seat width (b) | Correct valve seat width (b) if required. | |
Width of valve seat (b) | |||
Correction angle (γ) | |||
5 | Replace valve, check for leaktightness | ||
6 | Measure distance of valve stem end to camshaft bearing base | Insert dia. 5 mm round material into the middle of the camshaft bearing base for this step and measure dimension with vernier caliper. | |
Distance from end of valve stem to base of camshaft bearing (T) | |||
7 | Measure valve setback to cylinder head | ||
If measurement is less than minimum dimension, no correct valve clearance compensating element is possible. | |||
Valve setback (a) with new valves and new valve seat rings | |||
| Install | ||
8 | Install valves |