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It's actually easier to replace a Saturn thermostat than most other vehicles. Simply remove the thermostat housing and get a new one. The thermostat is molded into the housing. Remove the radiator hose to the housing, then remove the two nuts that hold the thermostat housing to the engine. You may need to work at breaking the housing loose since the gasket has probably seized to the engine.

Simply clean off any left-over gasket, and put the new gasket and thermostat housing in place.

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Q: How do you replace thermostat 1999 Saturn sl1?
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