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The engine thermostat is located in a water box, formed in the front of the lower intake manifold. The thermostat sits inside a housing, identifiable by its air bleed, and by the large radiator hose that attaches it to the radiator.

To change the thermostat--

* drain the cooling system down to thermostat level (or lower)

* remove the two (2) thermostat housing bolts, and the housing itself

* remove old thermostat, discard gasket and clean both gasket sealing surfaces (pay attention to the orientation of the thermostat when you took it out; it only works one way)

* install the new thermostat

* place new gasket onto water box surface, over the thermostat, and center the thermostat in the opening of the intake manifold

* apply gasket sealant, if necessary

* place the housing over the gasket and thermostat, and torque bolts down to 250 in. lbs.

* refill cooling system to compensate for lost coolant

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16y ago

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