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(1) If a replacement cover is installed, transfer the CCV valve grommet and oil filler cap from the origi- (2) Install cylinder head cover and gasket (Fig. 14). Tighten the mounting bolts to 10 N·m (85 in. lbs.) (3) Reinstall the plastic wiring loom trough at the rear of cylinder head cover. (4) Reconnect the left hand side of the wiring har- ness loom to all components. (5) Connect the CCV hoses. manifold and tighten bolts to 8.7 N·m (77 in. lbs.) (7) Connect control cables to throttle body linkage. clip. (9) Connect negative cable to battery. INTAKE/EXHAUST VALVES & DESCRIPTION The valves are made of heat resistant steel and have chrome plated stems to prevent scuffing. All STANDARD PROCEDURE - VALVE SERVICE VALVE REFACING Clean all carbon deposits from the combustion chambers, valve ports, valve stems, valve stem (1) Use a valve refacing machine to reface the intake and exhaust valves to the specified angle. (2) After refacing, a margin of at least 0.787 mm (0.031 inch) must remain (Fig. 16). If the margin is VALVE SEAT REFACING Clean all carbon deposits from the combustion chambers, valve ports, valve stems, valve stem (1) Install a pilot of the correct size in the valve guide bore. Reface the valve seat to the specified Fig. 14 Cylinder Head Cover Gasket Locator Pins at #8 & #9 Fig. 15 VALVE AND KEEPER CONFIGURATION 4.0L 1 - VALVE LOCKS (3–BEAD) Fig. 16 Valve Facing 1 - VALVE MARGIN TJ ENGINE 4.0L 9 - 91 CYLINDER HEAD COVER(S) (Continued) |