Removal
CAUTION:To prevent personal injury, do not remove surge tank cap while engine and radiator are hot because heat causes system to remain under pressure. Scalding fluid and steam may be blown out under pressure.
Drain coolant. Loosen hose clamp on upper radiator hose at thermostat housing. Disconnect upper radiator hose from thermostat housing. Remove mounting bolts that hold thermostat housing to cylinder head.
Remove thermostat housing from cylinder head. Remove O-ring seal from thermostat housing. Remove thermostat from thermostat housing by pressing thermostat mounting flange downward and then rotating flange clockwise. Inspect valve seat for foreign matter that could prevent valve from sealing properly. Inspect thermostat for proper operation. Clean thermostat housing and cylinder head mating surfaces.
Installation
Install thermostat into thermostat housing by pressing thermostat mounting flange downward and then rotating flange counterclockwise. Rotate thermostat mounting flange until it is seated in thermostat housing recesses. Coat sealing surface of new O-ring seal with Lubriplate. Install new O-ring seal into recess in thermostat housing. Install thermostat housing to cylinder head.
Secure thermostat housing to cylinder head with mounting bolts. Tighten thermostat housing mounting bolts to 15 N.M (11 ft. Lbs.). Connect upper radiator hose to thermostat housing. Secure upper radiator hose to thermostat housing with a hose clamp. Refill engine cooling system.
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Wednesday, March 17th, 2010 AT 7:32 AM
