Question about 1990 Buick Century
1. Follow the upper radiator hose from the radiator to the engine block
and there you should see a neck where the hose is connected to the
2. Take the hose off by removing/loosening the clamp and pulling the hose off. Sometimes it's easier to use a screwdriver to pry the hose off. Be careful though not to damage the hose.
3. There should be 2 bolts on top off the housing. Take the bolts completely out and remove the housing from the engine block.
4. Remove the thermostat and gasket from the block and clean the location good with a wire brush. This ensures a good seal for the new gasket. Sometimes it helps to have a razor blade or other scraper to clean it with. Try not to score the metal when cleaning.
5. Installation is reversed. Some thermostats require a sealant to be used with the gasket, be sure to ask when you buy the thermostat.
6. Start vehicle and let it run for a little bit to check for leaks. If everything checks out, you are good to go.
Posted on Jun 26, 2010
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Posted on Jan 02, 2017
Tips for a great answer:
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Please see my tip at http://www.fixya.com/cars/r5929960-s_thermostat .
Specific instructions for your car are as follows. Let me know if you get stuck or have more questions. 5.3L Engine
Removal & Installation
NOTE The thermostat is not serviceable separately. The water pump inlet and thermostat must be replaced as an assembly.
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