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6. Remove thermostat housing mounting bolts , ther- mostat housing (1) and thermostat (3). INSTALLATION 5.7L ENGINE 1. Clean the mating areas of the intake manifold and thermostat housing (1). 2. Install the thermostat (4) (spring side down) into the recessed machined groove on the intake manifold. 3. Install the gasket on the intake manifold and over the thermostat. 4. Position the thermostat housing (1) to the intake manifold. Note: The word FRONT stamped on 5. Install the housing-to-intake manifold bolts. Tighten the bolts to 23 N·m (200 in. lbs.) . 6. Install the radiator upper hose to the thermostat housing. 7. Air Conditioned vehicles; Install the generator. Tighten the bolts to 41 N·m (30 ft. lbs.). 8. Install the support bracket (generator mounting bracket-to-intake manifold).. Tighten the bolts to 54 9. Install the accessory drive belt (Refer to 7 - COOL- ING/ACCESSORY DRIVE/DRIVE BELTS - INSTAL- 10. Fill the cooling system (Refer to 7 - COOLING - STANDARD PROCEDURE). 11. Connect battery negative cable. 12. Start and warm the engine. Check for leaks. 3.7L/4.7L ENGINE 1. Clean mating areas of timing chain cover and ther- mostat housing. 2. Install thermostat (spring side down) into recessed machined groove on timing chain cover. 3. Position thermostat housing on timing chain cover. 4. Install two housing-to-timing chain cover bolts. Tighten bolts to 13 N·m (112 in. lbs.) torque. HB ENGINE 7 - 35 |