Valve Guide Service
- Check valve guide for wear. If replacement is necessary, press out guide toward combustion chamber. Measure guide bore in cylinder head. If bore exceeds 0.5512" (14 mm), ream head and install oversize guide.
- Heat cylinder head to 428 - 482°F (220 - 250°C) and press in new guide from top side until tapered groove end protrudes 0.591" (15 mm) above surface. Ream guide to obtain specified clearance. Valve guides are available in the following sizes (O.D. measurements given):
VALVE GUIDE SIZES
| Application | Guide O.D. In. (mm) |
|---|---|
| Standard | .5532 (14.05) |
| 1st Oversize | .5551 (14.10) |
| 2nd Oversize | .5590 (14.20) |
| 3rd Oversize | .5630 (14.30) |