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CAUTION Never open, service or drain the radiator or cooling system when hot; serious burns can occur from the steam and hot coolant. Also, when draining engine coolant, keep in mind that cats and dogs are attracted to ethylene glycol antifreeze and could drink any that is left in an uncovered container or in puddles on the ground. This will prove fatal in sufficient quantities. Always drain coolant into a sealable container. Coolant should be reused unless it is contaminated or is several years old.
Fig. 1: The thermostat housing is located at the front of the intake manifold, and is attached by two retaining bolts
Fig. 2: The gasket usually sits atop the thermostat, as in this case. However, on some engines, the gasket is underneath the thermostat flange
Fig. 3: Remove the thermostat from the manifold by lifting it straight up
Fig. 4: Take care when cleaning the surfaces for the new gasket; it is necessary to remove any residue to allow the gasket to adhere
NOTE: If a new thermostat is being installed, make sure the replacement is the specified part for the vehicle.
Fig. 5: Place the new thermostat and gasket on the intake manifold before attaching the thermostat housing
Fig. 6: The word FRONT is usually stamped on the thermostat housing. This goes toward the front of the vehicle for installation
NOTE: The thermostat housing may have the word FRONT on it; this goes towards the front of the vehicle.
Fig. 7: This exploded view shows the typical order of installation of the thermostat
NOTE: Ensure that you have retightened the radiator drain before refilling with coolant.