Dorman 902-2010 Engine Coolant Thermostat Housing

Engine Coolant Thermostat Housing for GM Cooling Systems

Dorman 902-2010 is a replacement engine coolant thermostat housing built for specified Buick, Cadillac, Oldsmobile, and Pontiac applications. It matches the stock housing’s fit and durability requirements while using a metal construction and a 90-degree neck to handle demanding cooling-system temperatures.

For drivers searching for a thermostat housing for a 2006-2011 Buick Lucerne or a 1993-2004 Cadillac Seville, this housing provides a direct replacement solution for the cooling system. The included gasket helps support a proper seal at the housing-to-engine interface.

Key Features

• Metal thermostat housing with black finish
• 90-degree housing neck angle for the specified cooling-system layout
• 1.5 in. outlet port diameter
• Gasket included for sealing
• Two mounting holes with 0.313 in. mounting hole diameter
• No thermostat included
• No bleeder valve and no O-rings required
• Package contents: thermostat housing with gasket

Detailed Description

Dorman 902-2010 thermostat housing is engineered as a stock-style replacement for vehicles that use this cooling-system configuration. The metal housing is built to withstand repeated temperature swings, helping maintain service life in demanding engine bay conditions. It is a practical choice when replacing a cracked, warped, or leaking thermostat housing on a Buick Lucerne, Cadillac DTS, Cadillac DeVille, Cadillac Seville, Oldsmobile Aurora, Cadillac Eldorado, Pontiac Bonneville, or Cadillac Allante.

This part cross-references Four Seasons 85284 and Motorad 5284KT for the same application. Dorman 902-2010 is also referenced by other aftermarket numbers including AMS Automotive 6259, Interchanges 1647540/TG259, and Valeo 815667.

What It Helps Fix

• Coolant leaks at the thermostat housing
• Cracked or warped housing surfaces
• Improper sealing at the coolant outlet
• Cooling-system service issues caused by housing deterioration
• Replacement needs on high-mileage GM engines

Installation Notes and Tips

Verify the outlet port diameter, 90-degree neck angle, and mounting-hole layout before installation. Clean the mating surface thoroughly, inspect the thermostat and related cooling components, and replace any damaged gasket surfaces before reassembly. This housing does not include a thermostat or bolts, so confirm the existing hardware and thermostat condition during service.

Compatible with 2006-2011 Buick Lucerne, 2006-2011 Cadillac DTS, 1994-2005 Cadillac DeVille, 2004-2005 Pontiac Bonneville, 1993-2004 Cadillac Seville, 2001-2003 Oldsmobile Aurora, 1995-1999 Oldsmobile Aurora, 1993-2002 Cadillac Eldorado, and 1993 Cadillac Allante.

Quality Assurance

Dorman designs replacement cooling-system parts to match the fit and durability of the original component on specified vehicles. Part number 902-2010 is built for direct replacement use in the listed applications and is intended to withstand extreme temperature changes in normal engine operation.