Valve Guide Servicing
- Check valve guide for wear. If replacement is necessary, press out guide toward combustion chamber side of head. Measure guide bore in cylinder head. If bore exceeds 0.5512" (14.00 mm), ream head and install oversize guide. Shrink fit specification for oversize bore is 0.0006 - 0.0017" (.015-.043 mm).
- Heat cylinder head to 428-482°F (220-250°C). Press in new guide from top of head until tapered groove end protrudes 0.591" (15.01 mm) for standard guide, or 0.531" (13.5 mm) for modified guide. Ream guide to obtain specified clearance. See Replacement Valve Guides table for oversizes.
REPLACEMENT VALVE GUIDES
| Application | Guide O.D. In. (mm) |
|---|---|
| Standard | .553 (14.05) |
| 1st Oversize | .555 (14.10) |
| 2nd Oversize | .559 (14.20) |
| 3rd Oversize | .563 (14.30) |
| Standard Length | 2.047 (52.00) |
| Modified Length | 1.988 (50.50) |