CLEAN VALVE SEAT THOROUGHLY. CHECK SEAT-TO-VALVE FACE CONTACT BY APPLYING
LIGHT COAT OF PRUSSIAN BLUE PASTE TOVALVE SEAT LAND. INSERT VALVE IN GUIDE AND
BOUNCE HEAD ON SEAT INSERT WITHOUT ROTATING VALVE. FULL 360-DEGREE CONTACT
LINE SHOULD APPEAR CENTERED ON VALVE FACE.
Reduced-thickness valve seat inserts are available 0.010, 0.020, and 0.030 in.
(0.254, 0.508, and 0.762 mm) shallower than standard. When reduced-thickness
inserts are used, install correspondingly thicker valve spring seats.
VALVE HEAD RECESS DEPTH FROM CYLINDER HEAD FIRE DECK IS INCREASED BY GRINDING
VALVE SEAT. CHECK WITH SLED GAGE (42). REPLACE VALVE SEAT IF NOT BETWEEN
0.055-0.067 IN. (1.4-1.6 mm).
POSITION CYLINDER HEAD STEP.
Intake valves have larger faces and are installed in guides on cam side of
cylinder head. Smaller exhaust valves are installed in guides on thermostat side
of cylinder head.
LUBRICATE VALVE STEM (43) WITH CLEAN ENGINE LUBRICATING OIL AND INSERT VALVE
INTO VALVE GUIDE (31) FROM FIRE DECK SIDE OF CYLINDER HEAD.
C A U T I O N
If other than standard valve seat has been installed, use correspondingly
thicker valve spring seat. Failure to do so could result in damage to
INSTALL VALVE SPRING SEAT (44) OVERVALVE GUIDE (31) AND AGAINST TOP OF CYLINDER