Stant 48718 Engine Coolant Thermostat / Water Outlet Assembly

Integrated Thermostat Housing for GM and Hummer Applications

Stant Part Number 48718 is an engine coolant thermostat and water outlet assembly with the thermostat integrated into the housing. It is built from durable material for long service life and uses a 190-degree thermostat temperature rating for OE-style cooling system operation. This Stant integrated thermostat housing is a direct-fit solution for select Chevrolet Colorado, GMC Canyon, Hummer H3, Hummer H3T, and Isuzu truck applications.

Key Features

• Integrated thermostat housing assembly simplifies replacement
• 190-degree thermostat temperature rating
• Durable housing material for long-lasting service
• Seal included
• Flange diameter with seal: 1.64 in.
• Flange diameter without seal: 3.1 in.
• Height from flange to bottom: 1.12 in.

Product Details

Stant 48718 combines the thermostat and water outlet housing into one assembly, reducing the number of separate components needed during service. The integrated design supports a cleaner thermostat replacement on vehicles that use this style of coolant outlet, including Chevrolet Colorado and GMC Canyon models, along with select Hummer H3 and Isuzu i-290, i-280, i-350, and i-370 applications. The 190-degree thermostat specification matches OE temperature requirements for the listed vehicles.

This part cross-references no additional part numbers in the provided data. Stant Integrated Thermostat Housing 48718 is a practical choice when replacing a worn coolant outlet thermostat housing on a Chevrolet Colorado thermostat housing application or a GMC Canyon water outlet assembly application.

Common Cooling System Issues Addressed

• Coolant leaks at the thermostat housing
• Cracked or warped water outlet housing
• Sticking thermostat causing unstable engine temperature
• Service delays from replacing thermostat and housing separately
• OE temperature control concerns on the cooling system

Installation Notes and Tips

Verify flange dimensions and seal condition before installation. Clean the mating surfaces thoroughly and inspect the cooling system for contamination or damaged hoses before installing the new assembly. Because the thermostat is integrated into the housing, replacement is more straightforward than servicing separate components. Confirm the vehicle uses a 190-degree thermostat specification before installation.

Quality Assurance

Stant manufactures cooling system components for OE-style service applications, and this integrated thermostat housing is built to meet the temperature and fitment requirements listed for the covered vehicles. No warranty information was provided in the product data.