Cylinder head and Valves/Valve seats VALVE SEAT INSERT INSTALLATION 1. Freeze the valve seat inserts to -30˚C (-22˚F). 2. Using JDG676 Pilot Driver (A) and JDG675 Valve Seat Insert Installing Adapter (B), install valve seat inserts. 3. Lap valve seats to maintain correct valve recess and valve to valve seat sealing. (See “Lapping valve seats”, in this group) RG5653 -UN-12APR90 CD,3274,G05,16 -19-01FEB94 CTM3274 (01JUL99) 05-15 Saran Liter Engines 060799 PN=52 • Machining valve seat insert 1. Machine insert according to valve seat bore specifications as shown, until a thin layer of material stays in cylinder head. -UN-10MAR90 2. Remove rest of material and clean valve seat bore. A—Exhaust:
42.987—43.013 mm (1.6924— 1.6934 in.) Intake: 47.104—47.130 mm (1.8545—1.8555 in.) B—Exhaust: 3.82 mm (0.150 in.) Reference RG5606 Intake: 3.45 mm (0.136 in.) Reference C—9.936—10.064 mm (0.3912—0.3962 in.) D—38—42˚ E—Maximum radius 0.5 mm (0.019 in.) CD,CTM125,031 -19-29JUN99 05 15