Valve Seat
Oversize valve seats can be installed. Valves seats are available in oversize of .012" (.30 mm) and .024" (.61 mm). Replacement procedure is not available from manufacturer. Cylinder head must be reworked to proper dimension for oversize valve seat installation. See VALVE SEAT REWORK DIMENSIONS table in this article.
VALVE SEAT REWORK DIMENSIONS
| Oversize Valve Seat: In. (mm) | Cylinder Head Bore Diameter: In. (mm) | |
|---|---|---|
| Exhaust | ||
| .012 (.30) | 1.3110-1.3120 (33.299-33.325) | |
| .024 (.61) | 1.3228-1.3238 (33.599-33.625) | |
| Intake | ||
| .012 (.30) | 1.3898-1.3907 (35.301-35.324) | |
| .024 (.61) | 1.4016-1.4026 (35.601-35.626) | |