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How do you replace the thermostat on a 1997 Mercury Grand Marquis?
Wiki User
∙ 18y ago
Follow the top radiator hose back to the engine. There is where the t-stat housing is. Remove the hose, remove the housing, remove the old t-stat and o-ring. Install the t-stat into the intake manifold with the spring side toward the engine, and lay the new o-ring on top. Reinstall everything and be careful to evenly tighten the housing bolts until they are snug(DO NOT RAUNCH HARD ON THE BOLTS). Fill the cooling system with a 50/50 mix of coolant and water, and burp the system.
Wiki User
∙ 18y ago
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