Question about 2001 Buick Century

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Where is my thermostat located on a 1995 buick century

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On the 3.1 liter engine, the thermostat housing is located on the rear of the engine (the front being the end with the belt(s) on it. Follow the top radiator hose to the housing. To remove the housing, first remove the air cleaner housing and the duct from it to the MAF. Then remove the 4 screws from the heat shield that is on top of the exhaust cross-over. You will probably also have to loosen the top radiator hose and remove it from the thermostat housing, and also disconnect a wiring harness in order to make room to remove the heat shield. You will need a 10mm socket and a long extension to get to the 4 bolts. Wouldn't hurt to spray each one first with penetrating fluid. Don't remove the exhaust crossover pipe. It will usually break off bolts and that's a lot bigger job. After you've made room to access the housing, use a 13mm socket to remove the top housing bolt. It should be a straight access. The bottom bolt must be loosened with a 13mm box end wrench with 10 or 12-point flats. You'll only be able to unscrew it a little bit at a time. Keep turning it out until there is enough room to remove the housing. You don't need to completely unscrew the bolt, as there is a slot in the bottom bolt hole of the housing so it slides off sideways. You wouldn't want to completely unscrew it anyway, because it's in a really tight place and would be very difficult to start back in the hole. Once the bottom bolt is loosened sufficiently, jiggle the housing off, pull the thermostat out, replace with a new one, and retighten the bolts. Make sure you have pushed the housing firmly against the block first before tightening. You should be able to feel if the housing is flat against the block and the thermostat hasn't fallen out of the recess. If the thermostat is not in the recess, you could crack the housing if tightening with the edge of the thermostat pinched between the housing and the block.

Posted on Aug 05, 2008

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Follow top radatior hose or lower it should be a housen with two bolts

Posted on Jul 26, 2008


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