AR05.30-P-3831AV Replace Valve Seat Rings

Replace Valve Seat Rings






1 Remove valves
2 Check inner diameter of valve guide for wear

NOTE: If the measurements obtained for the valve guide are not within the stated tolerance, Replace valve guide.

3 Screw valve seat ring out of cylinder head using ring seat turning tool

NOTE: Pay attention to operating instructions for ring seat turning tool.

4 Measure diameter of valve seat ring basic bore (D1, D2) in cylinder head

NOTE: Overlap between valve seat ring and basic bore must be assured.

- If the dimensions differ from the specified values, as of Machine basic bore to the next oversize of the valve seat rings.
- Pay attention to inspection and machining dimensions of the valve seat rings and of the basic bore.

DANGER:
- Risk of injury to skin and eyes when handling hot or glowing objects Heat cylinder head in recirculated air heating cabinet or heating oven
- Wear safety gloves, protective clothing and safety glasses, if necessary.

5 Heat cylinder head in recirculated air heating cabinet or heating oven

NOTE: Temperature approx. 80 degrees C

6 Drive in valve seat ring using a suitable drift
7 Inspecting, removing, installing valve guides

CAUTION: The valve must always be replaced after installing a new valve seat ring.

8 Install in the reverse order.