Toyota 90916-03093 Thermostat

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Before initiating any repair or replacement work, ensure that the coolant level and drive belt tension are appropriate and the operation of the temperature gauge is checked. An engine that takes a while to warm up likely indicates an open thermostat, which will need to be replaced. If the engine is hot, but the lower radiator hose is not, the thermostat is probably stuck in the closed position, requiring a new one. A hot lower radiator hose means the coolant is circulating and the thermostat is working properly. However, an overheated engine could suggest more serious issues such as leaking cylinder head gaskets, scuffed pistons, or warped or cracked cylinder heads. For the replacement process, start by disconnecting the battery's negative terminal cable, draining the cooling system, and detaching the thermostat housing from the engine. Be ready for some coolant spillage when breaking the gasket seal. You can leave the radiator hose attached to the housing unless the housing is to be replaced. Remove the thermostat, taking note of its installation direction, and thoroughly clean the sealing surfaces. Installation involves placing a new gasket on the thermostat, ensuring it fits evenly. Install the thermostat with the jiggle pin, if available, positioned at the top. Reinstall the thermostat housing with a new gasket, and tighten the housing fasteners to the correct torque specifications. Reinstall all other components in reverse order of removal, refill the cooling system, start the engine, and check for leaks and proper operation.

No you will also need to purchase 1 of the gasket # 16325-62010