Thermostat Replacement (4.3L)
Remove the air cleaner and the duct assembly.
Partially drain the coolant.
Remove the coolant recovery reservoir.
Disconnect the radiator hose from the thermostat housing.
Remove the bolts attaching the thermostat housing to the thermostat.
Remove the thermostat housing.
Remove the thermostat.
Clean the gasket mating surfaces.
Notice: Refer to Coolant Addition Notice in Service Precautions.
Install the thermostat.
Install the thermostat housing to the intake manifold.
Notice: Refer to Fastener Notice in Service Precautions.
Install the bolts to the housing.
Tighten the bolts to 25 Nm (18 ft. lbs.) .
Connect the radiator hose to the thermostat housing.
Install the coolant recovery reservoir.
Install the air cleaner and the duct.
Refill the cooling system.
Bleed the air from the cooling system.
Inspect the thermostat housing and the gasket for coolant leaks.
Sunday, January 17th, 2016 AT 6:30 AM