Valve Seat: Service and Repair

Machining Valve Seat Rings






1 Remove valves
2 Inspect valve guide
- if necessary after inspecting, replace valve guide.

3 Machine valve seats

NOTE: Pay attention to operating instructions of machining tool manufacturer. Maintain dimensions as stated in inspection and setting data.

4 Inspect valve seat for leaks, Measure valve seat width
- If necessary, correct valve seat width (angle alpha and beta)

5 Measure distance from valve stem end to camshaft bearing base

NOTE: Insert diameter 6 mm round material into middle of camshaft bearing base and measure dimension with caliper gage.

CAUTION: If measurement is less than minimum dimension, no correct valve clearance compensation is possible, replace valve seat rings.

6 Install in the reverse order.