Dorman 902-983 Engine Coolant Thermostat Housing - Engine Block or Upper

Overview of Dorman Engine Coolant Thermostat Housing 902-983

The Dorman 902-983 engine coolant thermostat housing is designed for reliable cooling system performance in select Audi and Volkswagen vehicles. This black plastic water outlet provides a precise fit for models including the Audi 100, 100 Quattro, and Volkswagen EuroVan.

• Durable black plastic construction
• Outlet port diameter of 1.5 inches for proper coolant flow
• Two mounting holes with 0.35-inch diameter for secure installation
• 90-degree housing neck angle to match OEM specifications
• Includes water outlet only; thermostat and gasket not included

Product Details and Specifications

The Dorman 902-983 thermostat housing is engineered with a 90-degree neck angle to ensure compatibility with the cooling system layout of Audi 100, 100 Quattro, and Volkswagen EuroVan models. Constructed from durable plastic, this housing resists corrosion and heat exposure typical in engine compartments. The outlet port diameter measures 1.5 inches, facilitating efficient coolant flow. It features two mounting holes, each with a diameter of 0.35 inches, allowing for a secure and stable fit. This part does not include a gasket, seal, thermostat, bolts, or air vent (bleeder valve), so these components must be sourced separately if needed.

Compatible Vehicles and Applications

This engine coolant thermostat housing is compatible with the following vehicles:

• Audi 100
• Audi 100 Quattro
• Volkswagen EuroVan

Use this part to replace a damaged or leaking thermostat housing in these specific models to maintain proper engine temperature regulation and prevent coolant leaks.

Common Issues Addressed by This Thermostat Housing

• Coolant leaks caused by cracked or warped housing
• Overheating due to faulty thermostat housing fitment
• Corrosion damage compromising coolant flow
• Loose mounting leading to coolant system pressure loss
• Replacement of worn or brittle plastic housings

Installation Notes and Tips

When installing the Dorman 902-983 thermostat housing, ensure the mounting surface is clean and free of old gasket material. Since this part does not include a gasket or bolts, use OEM or compatible replacement hardware and seals. Tighten mounting bolts evenly to the manufacturer’s torque specifications to avoid warping the plastic housing. Verify the 90-degree neck angle aligns correctly with the coolant hoses for proper fitment.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards for fit, form, and function. While this product does not include a thermostat or gasket, it is designed to provide a reliable replacement housing for the specified Audi and Volkswagen models. Warranty coverage details should be confirmed with the distributor or manufacturer, as they may vary.