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CAUTION: The serpentine drive belt must be routed (16) Install the serpentine drive belt. (refer to Group 7, Cooling System for the proper procedure). (17) Install the air cleaner and ducting. housing and fill the cooling system to the specified (19) The automatic transmission throttle linkage and cable must be adjusted after completing the (20) Install the temperature sending unit and con- nect the wire connector. (21) If equipped with air conditioning, install A/C compressor and charge A/C system (refer to Group 24 (22) Connect negative cable to battery. WARNING: USE EXTREME CAUTION WHEN THE (23) Operate the engine with the radiator cap off. Inspect for leaks and continue operating the engine VALVES AND VALVE SPRINGS This procedure is done with the engine cylinder head removed from the block. REMOVAL (1) Remove the engine cylinder head from the cyl- inder block. (2) Use Valve Spring Compressor Tool MD-998772A and compress each valve spring. (3) Remove the valve locks, retainers, springs and valve stem oil seals. Discard the oil seals. (4) Use a smooth stone or a jewelers file to remove any burrs on the top of the valve stem, especially (5) Remove the valves, and place them in a rack in the same order as removed. INSTALLATION (1) Thoroughly clean the valve stems and the valve guide bores. (2) Lightly lubricate the stem. bore. (4) Install the replacement valve stem oil seals on the valve stems. If the 0.381 mm (0.015 inch) over- (5) Position the valve spring and retainer on the engine cylinder head and compress the valve spring (6) Install the valve locks and release the tool. hammer to ensure that the spring is properly seated (8) Install the engine cylinder head. HYDRAULIC TAPPETS Retain all the components in the same order as removed. REMOVAL (1) Remove the engine cylinder head (Refer to cyl- inder head r&i in this section). (2) Remove the push rods. ings in the cylinder block with a Hydraulic Valve INSTALLATION It is not necessary to charge the tappets with engine oil. They will charge themselves within a very (1) Dip each tappet in Mopar Engine Oil Supple- ment, or equivalent. (2) Use Hydraulic Valve Tappet Removal/Installa- tion Tool to install each tappet in the same bore from (3) Install the cylinder head assy (Refer to cylinder head r&i in this section). (4) Install the push rods in their original locations. Fig. 57 Hydraulic Valve Tappet Removal— Installation Tool 1 – HYDRAULIC TAPPET REMOVAL TOOL 9 - 100 4.0L ENGINE XJ REMOVAL AND INSTALLATION (Continued) |