Dorman 902-850 Engine Coolant Thermostat Housing - Cylinder Head or Inner

Overview of Dorman 902-850 Engine Coolant Thermostat Housing

The Dorman 902-850 engine coolant thermostat housing is designed for reliable cooling system performance in select Volkswagen models. This black plastic housing provides a precise 90-degree housing neck angle and includes essential seals to ensure a secure fit and leak-free operation.

• Constructed from durable black plastic material
• Outlet port diameter of 1.28 inches for proper coolant flow
• Includes gasket and O-rings for effective sealing
• Features 8 mounting holes with 0.27-inch diameter each
• Designed with a 90-degree housing neck angle for optimal fit
• Package contains water outlet and O-ring; thermostat and bolts not included

Detailed Product Description

The Dorman 902-850 engine coolant thermostat housing is engineered to meet the cooling system requirements of Volkswagen vehicles such as the Corrado, EuroVan, Golf, Jetta, and Passat. Made from high-quality plastic, this thermostat housing offers corrosion resistance and durability under typical engine operating conditions. The 1.28-inch outlet port diameter ensures proper coolant circulation, while the included gasket and O-rings provide a tight seal to prevent leaks. With eight mounting holes sized at 0.27 inches, the housing secures firmly to the engine block. The 90-degree housing neck angle is designed to match factory specifications, ensuring compatibility and ease of installation.

Compatible Vehicles and Common Applications

• Volkswagen Corrado engine coolant thermostat housing replacement
• Thermostat housing for Volkswagen EuroVan cooling system maintenance
• Replacement part for Volkswagen Golf thermostat housing leaks or damage
• Volkswagen Jetta cooling system repair requiring thermostat housing
• Thermostat housing for Volkswagen Passat engine coolant flow control

Installation Notes and Tips

When installing the Dorman 902-850 thermostat housing, ensure the engine is cool before beginning work. Use the included gasket and O-rings to achieve a proper seal and prevent coolant leaks. Verify that the 90-degree housing neck aligns correctly with the coolant hoses. Since bolts are not included, reuse the original mounting hardware or source appropriate replacements. Double-check all mounting holes for secure attachment and inspect for any signs of wear or damage on surrounding components.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards for fit, form, and function. The 902-850 thermostat housing undergoes quality inspections to ensure durability and reliable performance in Volkswagen cooling systems. While specific warranty details are not provided here, Dorman typically offers limited warranties on their replacement parts. Consult product documentation or the manufacturer for exact warranty terms.