Replacement

NOTE: Numbers in parentheses ( ) indicate a component or tool in the associated illustration.

1. Remove valve seat rings (20 and 21).
2. Observe operating instructions of tool manufacturer.
3. Measure basic bore diameter (D1) with internal measuring instrument.
4. Select valve seat rings (standard size or repair size) according to overlap.
- If repair size, machine basic bore.
- If repair size, seat ring bore matching valve seat ring. Pat attention to overlap.
5. Cool valve seat ring with liquid nitrogen and insert with a suitable drift.
6. Machine valve seats.

Specifications
Bore Of Valve Seat Ring:
Standard Size:
D1 Cylinder Head (Diameter X Height):
Inlet: 36 mm X 6 mm
Exhaust: 32 mm X 6 mm
D Valve Seat Ring:
Inlet: 36.1 - 36.12 mm
Exhaust: 32.1 - 32.12 mm
Repair Size:
D1 Cylinder Head (Diameter X Height):
Inlet: 37.2 mm X 6 mm
Exhaust: 33.2 mm X 6 mm
D Valve Seat Ring:
Inlet: 37.3 mm
Exhaust: 32.3 mm
t: 5.6 - 5.9 mm
D2:
Inlet: 30 mm
Exhaust: 25.6 mm