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Refer to Group 11, Exhaust System and Turbo- (7) Then, tighten the 14mm bolts with special tool VM.1019 in the following manner: (8) 1st Phase: Tightening Head Bolts (Fig. 67). Central bolts (A-L): Tighten all bolts, starting with (9) Tighten the 12mm bolts in the following man- ner: (10) Side bolts (M1-M2): Tighten M1 bolts to 30 N·m, then rotate them 85° ( 65). Tighten M2 bolts to 30 N·m, then rotate them 85° ( 65). NOTE: If vehicle is equipped with A/C do not install (11) 2nd Phase: After 20 minutes of engine oper- ation at operating temperature, allow engine to cool down completely. Then retorque the head bolts as fol- (12) Central bolts A-L: Completely back off bolts one-by-one and then retighten to 30 N·m plus 130° 65°). Then proceed in the same way, bolt by bolt, following alphabetical order, as indicated. (13) Side bolts M1-M2: Without slackening, torque bolts M1 then bolts M2 to 90 N·m (66 ft. lbs.). (14) Torque intake nuts to 28 N·m (20 ft. lbs.) and exhaust manifolds nuts to 32 N·m (24 ft. lbs.) after (15) Install the oil feed lines for the rocker arm assemblies. Torque oil feed lines to 13 N·m (115 in. (16) Install the oil feed line retaining clip at rear of the cylinder head (Fig. 69). Torque bolt to 5.5 N·m (17) Install the push rods. (Fig. 70). WARNING: During the installation of the rocker arm • Install the rocker arm assemblies in the same order as removed (Fig. 70). Fig. 67 Engine Cylinder Head Bolt Tightening Sequence Fig. 68 Oil Feed Lines 1 – ROCKER ARM ASSEMBLIES 9 - 38 ENGINE WJ REMOVAL AND INSTALLATION (Continued) 2000 JEEP GRAND CHEROKEE |