Toyota How To Replace The Thermostat PDF Manual

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.

NOTE:If vehicle overheats after thermostat installation, check
with dealer for advanced diagnosis.

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.

The “Check Engine” light comes on: Take the vehicle to your Toyota
Dealer Service Department for diagnosis and repair.

Please refer to the following sources for additional information:
• Your vehicle’s Owner’s Manual
• Your vehicle’s Repair Manual
• Genuine Toyota Coolant Brochure

Moving parts like the fan blade and drive belts, as well as extreme heat in the engine compartment or from the exhaust system can result in serious injury.
• Approach with caution and care.
• Never take shortcuts when replacing parts.
• Improper servicing may damage your Toyota and lead to personal injury.
• Unless you have proper knowledge, equipment and tools, you should have your Toyota Dealer Service Department perform the repairs and maintenance.

Download Toyota How To Replace The Thermostat PDF Manual