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Inst. for 2003, 2.3Liter, V6 (2300)
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Before beginning, You will need a new thermostat (obviously) AND a new Throttle body gasket (apx. $1.50).
(remove hoses and clamps as you see fit...)
1. You will need to drain radiator fluid (at least partly).
2. Detach Throttle cable assembly (2 bolts in top, 1 nut bottom(front)) from Throttle body in order to access throttle body bolts.
3. Remove throttle body (2 bolts) in order to access the thermostat housing. You may run into issues with some hoses, feel free to disconnect and move them out of the way. JUST REMEMBER to reconnect them!
4. it will be easier to access the 2 bolts holding the thermostat housing to the engine by removing the exhaust manifold heat shielding, however, it may prove to be more trouble than its worth. you can access the bolts without removal but can be frustrating. Either way... its your choice.
5. The thermostat is housed in an aluminum, "J" shaped, pipe connected to the engine beneath the throttle body. Removal requires removal of the upper bolt and near removal of the lower (my vehicle has a slit in lower bolt hole so the housing can be "slid out" without complete removal).
6. once removed, you will have access to your thermostat.
CLEAN ALL SURFACE METALS of old gaskets and debris THEN replace your parts as you removed them. The thermostat itself has a gasket on it that seals up the housing. The throttle body gasket was (MOST LIKELY) destroyed during the removal. Remove any leftover gasket material. Be gentle! Remember, this part is trying to pull clean air from the filter. Any scratches and you may end up with a vacuum leak. The throttle body and thermostat housing should be torqued tight but not too much. Maybe 30lbs. I'm not exactly sure. Maybe another contributer has the answer to that.
Good luck! http://wiki.answers.com/Q/How_do_you_remove_the_thermostat_from_a_2003_impala
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∙ 15y ago
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