Dorman 902-963 Engine Coolant Thermostat Housing - Water Pump

Dorman 902-963 Thermostat Housing

Dorman 902-963 is a replacement engine coolant thermostat housing for select Volkswagen and Audi cooling systems. It is built to match the original housing’s fit and durability, with a plastic construction and a 90-degree neck angle from the base for proper water pump housing alignment.

Key Features

• Plastic thermostat housing in black finish
• Gasket or seal included for sealing at installation
• O-ring included; thermostat not included
• Two mounting holes with 0.25 in. diameter
• 90-degree housing neck angle from base
• No bleeder valve and no bolts included

Detailed Description

This engine coolant thermostat housing is engineered for direct replacement use on cooling system applications where the original housing mounts to the water pump housing or cover. Dorman 902-963 is listed for select 1980-1993 Volkswagen Rabbit Pickup, Rabbit Convertible, Atlantic, Quantum, Cabriolet, Corrado, and Passat models, plus Audi 4000, 80, and 90 applications. It cross-references Beck/Arnley 147-0028 for the same application. The included water outlet and O-ring support a clean service replacement when the housing has cracked, warped, or begun leaking.

What It Helps Fix

• Coolant leaks at the thermostat housing
• Cracked or heat-damaged plastic housing
• Improper sealing at the water pump housing cover
• Cooling system service issues caused by a worn outlet connection
• Fitment problems from an incorrect housing neck angle

Installation Notes and Tips

Verify the original housing style, mounting hole layout, and 90-degree neck orientation before installation. This part uses two mounting holes and includes the gasket/seal and O-ring, but does not include bolts or the thermostat. Clean the mating surfaces thoroughly and inspect the water pump housing and coolant passages for damage before reassembly.

Quality Assurance

Dorman designs this replacement thermostat housing to match stock fit and durability on specified vehicles and to withstand repeated temperature changes for extended service life. Part number 902-963 is a direct-fit cooling system replacement for select Volkswagen and Audi applications.