ACDelco Engine Coolant Water Inlet Assembly

The ACDelco Engine Coolant Water Inlet Assembly (also called a water outlet, thermostat housing or coolant inlet housing) is a replacement part for the engine cooling system. It connects the engine to the radiator hose. It also routes coolant through the system and, on many designs, holds the thermostat in place.

Key Features:

• Engineered as a replacement for the original coolant inlet or outlet housing
• Directs coolant flow between the engine and the cooling system
• Sealing surfaces are made to help prevent coolant leaks
• Built to hold up to engine heat, pressure and coolant exposure
• Backed by ACDelco, a brand with a long history in OE and aftermarket parts

A worn, cracked or leaking water inlet housing can cause coolant loss and overheating. Replacing it helps keep the cooling system sealed and running reliably. Choose the part number that matches your application.