Toyota How to Replace Thermostat

Short Description
RECHECK COOLANT LEVEL – Shut the engine off, allow it to cool and check the coolant level. Coolant level should also be checked at the coolant reservoir (as per Owner’s Manual). Fill the radiator as required. Refer to the Owner’s Manual for exact fill level specifications.

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Content
Engine runs hot or overheats: Check the coolant level in the radiator when the engine is cold. Check the radiator hoses and drain cock for leaks. Check the radiator, radiator cap, coolant reservoir, heater hoses and all hose connections for leaks. The radiator should also be inspected to ensure it’s free and clear of leaves, debris, etc. Remove the radiator cap when the engine is cold; run the engine for 5-10 minutes with the radiator cap removed to release air bubbles from the cooling system (this procedure may need to be repeated). With the engine off and the coolant still warm, touch the upper and lower radiator hoses. They should both be warm. If one is cold, the thermostat could be stuck in the closed position, or, the thermostat may have been installed backwards. If the problem persists, visit your Toyota Dealer Service Department for diagnosis and repair. DO NOT DRIVE THE VEHICLE if the engine overheats.
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