Re: I need to change the thermostat on a 1997 buick...
Water pump is located at the very back of your car engine almost touching the firewall.
its a pain to get back there and just pray your water pump dont actually go out cause its best to take to a mechanic its all inter twined with the timing chain and alot of removal just to take out and replace..best of luck
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follow the water inlet pipe to water pump the thermostat housing connects to water pump this is for 2.4l engine you have to remove exhaust manifold heat shield.you will see the water inlet pipe going to water pump inlet thermostat housing.for the 3.1 engine follow top radiator hose to thermostat housing you have to remove air filter air duct and filter housing , you have to remove throttle body unit with coolant hoses, you have to disconnect accelerator cable, transmission down shift cables at the bracket bolts to throttle body.once you remove throttle body unit then you can see and remove the thermostat housing to replace thermostat.you need to buy new throttle body gasket,and new small coolant hoses connects to the throttle body unit.have extra gallon antifreeze dexcool on hand.
The plastic housing on the driver side top of the engine that bolts to the head is the water outlet housing. The thermostat is under the car where the metal cooling pipe bolts to the water pump housing.
The metal tube that goes into the housing has an o-ring that seals it into the housing. The tube is held in place with a couple of bolts. Remove them and remove the tube. There should be signs of an o-ring on the tube. Sometimes you have to replace the housing in order to get them to seal up
I had the same problem a month ago. I thought it was the thermostat, which sits inside the lower water feed tube that runs from the radiator, under the car and up between the engine and trans axle to the thermostat housing and water-inlet housing attached to the water pump. I replaced it and it kept leaking. So I got under the car with a mirror and a light and found that it was leaking from a weep hole in the water pump. This happens when the water pump seal is bad. to replace the water pump you nearly have to take apart the back of the engine and the timing chain cover. The waterpump is mounted at the bottom of the back of the engine and is turned by the timimng chain. It took me two days to fix, and it was not easy. There are a couple of sites that have info, which helped me. It's about a $600 - $900 job if you take it to a repair shop.