ACDelco GM OE Engine Coolant Thermostat Housing

The ACDelco GM OE Engine Coolant Thermostat Housing (also called a thermostat housing, water outlet, or coolant outlet) is an original equipment-style replacement part. It holds the thermostat in place and gives the engine coolant a sealed path to the radiator. A good housing helps the engine reach and hold its proper operating temperature.

Key Features:

• Built to GM original equipment specifications for dependable fit and function
• Designed to seal the thermostat and coolant passage and help prevent leaks
• Made to withstand constant heat cycling, pressure, and exposure to coolant
• Replaces worn, cracked, or leaking housings that can lead to coolant loss and overheating
• Backed by ACDelco, GM's parts brand, which has a long record of OE-quality replacement parts

Replace the gasket or seal and check the coolant level whenever you install a new thermostat housing. Choose the variant that matches your application from the options listed on this page.