Dorman 902-694 Engine Coolant Thermostat Housing

Engine Coolant Thermostat Housing for GM V8 Cooling Systems

Dorman 902-694 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 designed to handle extreme temperature changes, helping maintain reliable cooling system performance on applications such as Chevrolet C1500, GMC K2500, and Cadillac Brougham.

Key Features

• Metal construction with a natural finish
• Outlet port diameter: 1.5 in.
• Gasket included for a direct replacement installation
• Two mounting holes with 0.313 in. diameter
• 60-degree housing neck angle
• No bleeder valve and no thermostat included
• Package contents: thermostat housing with gasket

Detailed Product Overview

This Dorman thermostat housing, part number 902-694, is engineered for cooling system service on a wide range of GM trucks, vans, SUVs, and chassis applications from the late 1980s through the mid-1990s. It is a practical OE-style replacement for vehicles that need a new engine coolant thermostat housing due to corrosion, warping, or sealing issues. This part cross-references Gates CO34752 and Motorad 4992KT for the same application.

Compatible With applications include Fits 1988-1995 Chevrolet C1500, N/A; Fits 1992-1995 Chevrolet C1500 Suburban, N/A; Fits 1988-1995 GMC K2500, N/A; and Fits 1990-1992 Cadillac Brougham, N/A. Additional coverage includes Chevrolet G30, GMC G3500, Chevrolet Tahoe, GMC Yukon, and other listed GM models. Part number 902-694 is also a useful reference when searching for a replacement thermostat housing for GM cooling system repair.

Common Repair Symptoms

• Coolant leaking from the thermostat housing area
• Warped or corroded housing surface causing seal failure
• Cracked housing neck or damaged outlet port
• Cooling system service after thermostat replacement
• Persistent coolant seepage around the housing gasket

Installation Notes

Verify the outlet port diameter, mounting hole spacing, and housing neck angle before installation. Clean the mating surface thoroughly, inspect the thermostat and related hoses, and replace any worn sealing surfaces before assembly. This housing includes a gasket, but bolts are not included. Confirm vehicle-specific fitment for Chevrolet C1500, GMC K1500, and related GM applications before ordering.

Quality Assurance

Dorman designs this replacement thermostat housing to match stock fit and durability on specified vehicles and to withstand repeated temperature cycling for extended service life. Part number 902-694 is built as a direct replacement cooling system component for the listed applications.