Integrated Thermostat Housing Assembly; 180-Degree (05-15 4.0L Tacoma)Find parts that fit my vehicle

Precision Cooling. The Thermostat Housing Assembly for 2003-2024 4.0L Toyota 4Runner models integrates a 180° flow path with an offset air relief valve to optimize coolant circulation and eliminate trapped air pockets. This direct replacement unit restores proper engine thermostat operation, ensuring consistent warm-up times and peak operating temperature control. Its robust design helps maintain engine performance and longevity under varied driving conditions.

Construction and Appearance. Crafted from durable stainless steel and featuring a precision-machined copper case, this assembly combines corrosion resistance with excellent thermal conductivity. The wax compound thermostat is fully tested and calibrated to open at the exact temperature specified by Toyota engineers. Stock-style seals at all interfaces guarantee leak-free performance, and the polished metal surfaces resist pitting and degradation over time, providing a long-lasting, factory-quality finish.

Installation. As a true direct replacement part, installation requires only basic hand tools and the removal of the original housing. After draining a portion of the coolant, unbolt the old assembly, clean the mounting surface, and install the new housing using the supplied seals. The offset air relief valve allows for quick bleeding of trapped air during refilling. Tighten fasteners to factory torque specifications and refill with the recommended coolant mix. Even first-time installers will find the process straightforward, restoring leak-free operation in under an hour.

Application. This Thermostat Housing Assembly fits 2005-15 4.0L Tacoma models. It enhances vehicle reliability by ensuring accurate temperature regulation, preventing overheating, and reducing strain on the cooling system. The precise calibration and robust materials help maintain consistent engine temperatures, improving fuel efficiency and reducing thermal wear over the life of your 4Runner.

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