STANDARD PROCEDURE - REFACING

NOTE: Valve seats that are worn or burned can be reworked, provided that correct angle and seat width are maintained. Otherwise the cylinder head must be replaced.

NOTE: When refacing valves and valve seats, it is important that the correct size valve guide pilot be used for reseating stones. A true and complete surface must be obtained.






VALVE FACE AND VALVE SEAT ANGLE CHART

DESCRIPTION
 
SPECIFICATION
 
SEAT WIDTH
 
 
INTAKE
 
1.018 - 1.62 mm
 
 (0.0464 - 0.0637 in.)
 
EXHAUST
 
1.48 - 1.92 mm
 
 (0.058 - 0.075 in.)
 
FACE ANGLE
 
 
INTAKE
 
45 ½° - 46°
 
EXHAUST
 
45° - 45½°
 
SEAT ANGLE
 
 
(INT. AND EXT.)
 
44½° - 45°