Aisin THT-019 Engine Coolant Thermostat

Reliable Engine Coolant Thermostat for Lexus, Toyota, and Scion Vehicles

The Aisin THT-019 engine coolant thermostat is designed to maintain optimal engine temperature for a range of Lexus, Toyota, and Scion models. Engineered with durable brass and stainless steel materials, this thermostat ensures consistent performance and longevity.

• Constructed from brass and stainless steel for durability and corrosion resistance
• Bottom by-pass design for efficient coolant flow
• Sealing flange outside diameter of 52.0 mm for precise fitment
• Opens at 82°C to regulate engine temperature effectively
• Compatible with multiple Lexus, Toyota, and Scion models including Camry, Highlander, RAV4, and more

Detailed Product Description

The Aisin THT-019 engine coolant thermostat features a bottom by-pass design that allows coolant to circulate through the engine block before the thermostat opens, promoting faster warm-up times and improved engine efficiency. Made from a combination of brass and stainless steel, this thermostat resists corrosion and wear, providing reliable operation over time. The sealing flange outside diameter measures 52.0 mm, ensuring a secure and accurate fit in the thermostat housing. The thermostat begins to open at 82°C, maintaining the engine within its optimal temperature range to prevent overheating or excessive cooling.

Compatible Vehicle Applications

• Lexus models: ES250, ES300, ES330, ES350, LS400, RX300, RX330, RX350, RX400h, RX450h, SC400
• Toyota models: 4Runner, Avalon, Camry, Celica, Corolla, Highlander, Matrix, MR2, MR2 Spyder, RAV4, Sienna, Solara, T100, Tacoma, Tundra, Venza
• Scion models: tC, xB, xD

Common Issues Addressed by the Aisin THT-019 Thermostat

• Engine overheating due to thermostat failure
• Poor engine warm-up performance
• Inconsistent engine temperature regulation
• Coolant leaks around the thermostat housing
• Reduced fuel efficiency caused by improper engine temperature

Installation Notes and Tips

When installing the Aisin THT-019 thermostat, ensure the engine is cool before removal to avoid injury. Clean the thermostat housing thoroughly to remove old gasket material and debris. Verify the sealing flange diameter matches the housing for a proper seal. Although this thermostat does not include a gasket or seal, use a compatible gasket or sealant as recommended by the vehicle manufacturer. Proper installation will help maintain engine temperature control and prevent coolant leaks.

Quality Assurance and Warranty

Aisin is a reputable manufacturer known for producing reliable automotive components. The THT-019 thermostat is manufactured to meet OEM specifications for fit and function. While specific warranty details are not provided, Aisin products typically come with a limited warranty against defects in materials and workmanship. For exact warranty terms, refer to the product documentation or contact the vehicle manufacturer.