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Where is the thermostat on a 1996 buick century 3.1 liter do you have to remove the exhaust manifold?
Wiki User
∙ 15y ago
It's under the throttle body, very close to the exhaust pipe, which you do not need to remove. A 13 mm wrench will be able to access the rear bolt head, but it's got very little swing. Use a ratcheting wrench if available. The front bolt should be accessible with a 13 mm socket. But first you'll have to loosen a mount for the coolant rail that travels along top of the exhaust, so that you are able to stick the socket between the rail and the exhaust. When those bolts are out, you should be able to pull the thermostat housing away (I left the housing bleeder line that comes out the top of the housing on) and pull out and replace the thermostat. The new one should come with a gasket surface, so there is no need for any sealer. I don't have a torque spec for the bolts, but the housing is aluminum, so go easy, but it needs to be sealed well; maybe try for about 15 or so foot pounds. If you are familiar with torqueing, then use your own judgement.
Wiki User
∙ 15y ago
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