Dorman 902-5070 Engine Coolant Thermostat Housing

Engine Coolant Thermostat Housing for Lexus and Toyota

Dorman 902-5070 is a replacement engine coolant thermostat housing built to match the fit and durability of the original housing on specified vehicles. It is made from metal and engineered to handle extreme temperature changes in the cooling system. This thermostat housing with gasket is a direct-fit service part for Lexus GS300, Lexus IS300, Lexus SC300, and Toyota Supra applications.

Key Features

• Metal construction with a natural finish
• Outlet port diameter: 1.438 in.
• Two mounting holes with 0.313 in. diameter
• 75-degree housing neck angle
• Gasket included; thermostat not included
• No bleeder valve and no bolts included
• Package contents: thermostat housing with gasket

Detailed Description

This Dorman thermostat housing, part number 902-5070, is designed for cooling system service where the original housing has cracked, warped, or corroded. Its metal construction supports long-term use in high-heat engine environments, while the included gasket helps simplify sealing during replacement. Cross-reference part numbers include Four Seasons 85196 and Motorad CH6070 for the same application. Compatible With 1993-2005 Lexus GS300, 2001-2005 Lexus IS300, 1992-2000 Lexus SC300, and 1993-1998 Toyota Supra cooling system repairs, this housing is a practical OE-style replacement for common thermostat housing service needs.

Common Problems It Can Help Address

• Coolant leaks at the thermostat housing
• Cracked or warped original housing
• Corrosion around the cooling system outlet
• Poor sealing at the thermostat housing gasket surface
• Cooling system service after thermostat-related repairs

Installation Notes and Tips

Verify outlet diameter, mounting hole spacing, and housing neck angle before installation. Clean the mating surface thoroughly before fitting the included gasket, and inspect the thermostat, hoses, and adjacent cooling components while the housing is removed. This part number 902-5070 does not include a thermostat, so reuse or replace that component separately as needed.

Quality Assurance

Dorman designs this replacement housing to match stock fit and durability on specified Lexus and Toyota applications. The metal construction is selected to withstand repeated temperature cycling in the cooling system, supporting dependable service in daily driving and repair work.