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INSTALLATION (1) Lubricate the tappets. nal positions. Ensure that the oil feed hole in the (3) Install the cylinder head, intake manifold, and exhaust manifold. Refer to cylinder head removal (4) Install the push rods. and push rod removal and installation in this section. (6) Install the cylinder head cover. Refer to cylin- der head cover removal and installation in this sec- (7) Connect the negative battery cable. CAUTION: To prevent damage to valve mechanism, (8) Start and operate engine. Warm up to normal operating temperature. ROCKER ARMS AND PUSH RODS REMOVAL (1) Disconnect the negative battery cable. the air conditioning system, if equipped. Refer to Group 24, Heating and Air Condi- (3) If equipped with air conditioning, remove the service valves and cap the compressor ports. Refer to (4) Remove the generator bracket. der head cover removal and installation in this sec- (6) Remove the rocker arm retaining nut (Fig. 27). bench in the same order as removed. (8) Remove the push rods and place them on a bench in the same order as removed. INSTALLATION WARNING: During the installation of the rocker arm • Install the rocker arm assemblies in the same order as removed. • Bring piston # 1 to Top Dead Center. • Rotate the engine 40° counter clockwise and stop. • At this point tighten all of the rocker arm nuts. Torque nuts to 27 N·m (20 ft. lbs.). NOTE: You must allow 30 minutes before starting (2) Install the cylinder head cover. Refer to cylin- der head cover removal and installation in this (3) Evacuate and charge the air conditioning sys- tem. Refer to Group 24, Heater and Air Conditioning. (4) Connect the negative battery cable. VALVE SPRINGS This procedure can be done with the engine cylin- der head installed on the block. REMOVAL (1) Disconnect the negative battery cable. and a set of conical valve locks. The locks can be (2) Remove the cylinder head cover. Refer to cylin- der head cover removal and installation in this sec- Fig. 27 Rocker Arm Retaining Nut 1 – ROCKER ARM ASSEMBLY 9 - 24 ENGINE XJ REMOVAL AND INSTALLATION (Continued) 2000 JEEP CHEROKEE |