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How do you replace the thermostat located on a 1990 Chevy Lumina?
Wiki User
∙ 18y ago
The thermostat in most vehicles is on the engine block. Follow the top radiator hose back to the engine and there will be a metal housing where the hose connects. The thermostat is UNDER that housing. Remove the hose, remove the housing and the thermostat is either UNDER the housing or a part of the housing. If the housing uses a gasket, make sure that both surfaces are clean before replacing the housing. If the housing uses a rubber seal, wipe down both surfaces before reassembling. Remove the 2 bolts on the housing. CAn leave the hose attached. Pull the housing up and away and you'll see the thermstat. Use pliers to grap the thermostat and pull up. Notice there's a rubber ring around the lip of the thermostat. This is instead of a gasket. Make sure you reuse that ring if the new thermostat doesn't come with one.
Wiki User
∙ 18y ago
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