5_108.bk Page 163 Thursday, October 4, 2001 11:45 AM
REPAIR INSTRUCTIONS VALVE GUIDES
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Inlet and Exhaust Valve Guide Dimensions Refer to Figure 212. r
Valve guide ID (3) — 0.3745–0.3755 inch (9.512–9.538 mm)
r
Top end of guide to valve spring seat (4) — 0.959 ± 0.040 inch (24.36 ± 1.016 mm)
r
Valve guide extension, fire deck to top of guide (5) — 5.24 ± 0.03 inch (133.096 ± 0.762 mm)
r
Valve guide bore in head (6) — 0.686–0.687 inch (17.424–17.450 mm)
r
Valve guide OD (7) — 0.6881–0.6886 inch (17.478–17.490 mm)
212
Figure 211 — Cutting Ring Groove 1. Socket 2. T-Handle
3. Cutter Head J 37719
7. After groove is cut, remove cutter head and cutter base from cylinder head. 8. Use a honing stone to remove any burrs around fire ring groove. 9. Check fire ring groove depth with depth gauge J 26948 to verify that groove depth meets specification. If groove depth does not meet specification, recut as necessary. 10. Repeat above procedure with each fire ring groove cut.
Figure 212 — Valve Guide Dimensions
To ensure proper groove depth, always adjust cutting tool height when cutting next groove.
1. Exhaust Valve Guide 2. Inlet Valve Guide 3. Valve Guide ID 4. Top End of Guide to Valve Spring Seat
5. Valve Guide Extension, Fire Deck to Top of Guide 6. Valve Guide Bore in Head 7. Valve Guide OD
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