Engine Coolant Thermostat - 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 housing. For adequate clearance, this must be placed towards the front of the vehicle. The housing is slightly angled forward after the installation to the intake manifold.
5. Install the housing-to-intake manifold bolts. Tighten the bolts to 23 Nm (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 Nm (30 ft. lbs.).
8. Install the support bracket (generator mounting bracket-to-intake manifold). Tighten the bolts to 54 Nm (40 ft. lbs.).
9. Install the accessory drive belt Accessory Drive Belt - Installation.
10. Fill the cooling system Service and Repair.
11. Connect battery negative cable.
12. Start and warm the engine. Check for leaks.