Motorad 860-203 engine coolant thermostat housing assembly for the 2017-2023 GMC Acadia V6 3.6L and other vehicles holds the thermostat that regulates engine coolant temperature. The thermostat opens at a set temperature to let hot coolant move on toward the radiator.
- Integrated housing with the 203-degree thermostat built in
- Copper case and wax compound for quick response to coolant temperature changes
- Aluminum, copper and stainless steel construction
- Bleeder hole in the housing for air relief
- 100% tested and calibrated
Quick facts
- Part: Motorad 860-203 engine coolant thermostat housing assembly
- Fits: 2017-2023 GMC Acadia V6 3.6L and other vehicles
- Material: Aluminum, Copper, Stainless Steel
- Condition: New
Coolant stains near the housing, overheating or an engine that is slow to warm up can point to a leaking housing or a sticking thermostat. Before you replace the housing, rule out a low coolant level (check it only with the engine cool), a leaking hose and a faulty temperature sensor.
Fits
The 2017-2023 GMC Acadia V6 3.6L, the 2017-2019 Buick LaCrosse V6 3.6L, the 2019-2026 Chevrolet Blazer V6 3.6L and more vehicles take this direct-fit replacement.
Specifications
Fit and size
- Quantity per vehicle: 1
- Inside diameter: 31.24 mm (1.23 in)
- Outlet port outside diameter: 35.05 mm (1.38 in)
- Outlet ports: 1
- Mounting holes: 2
- Bolt hole center to bolt hole center: 69.09 mm (2.72 in)
- Flange length: 74.68 mm (2.94 in)
- Flange width: 60.71 mm (2.39 in)
- Flange thickness: 8.64 mm (0.34 in)
Build and materials
- Material: Aluminum, copper, stainless steel
- Actuator type: Mechanical
- Valve type: Disk
- Start to open temperature: 95 °C
- Seals: rubber O-ring, 2 pieces
- Condition: New
- Country of origin: Israel
In the box
One thermostat housing assembly with two pre-installed rubber O-ring seals and mounting hardware; no sensor is included. This listing holds one housing, and each vehicle takes one.
Interchange: 15-11122 · 203-068 · 902-2115 · 860-221
86343 · 12670557 · 12673659 · 12678779 · 86021 · 86023 · P86021 · 15872 · 9860221
This part cross-references / interchanges with the following part numbers:
15-11122, 203-068, 860-203, 902-2115, 860-221, 86343, 12670557, 12673659, 12678779, 86021, 86023, P86021, 15872, 9860221
Frequently Asked Questions
Does the Motorad 860-203 thermostat housing assembly fit the 2017-2023 GMC Acadia V6 3.6L?
Yes. Motorad 860-203 fits the 2017-2023 GMC Acadia V6 3.6L and other vehicles. If your car is not named here, look for it in the "Vehicles it fits" section on this page.
Does this thermostat housing come with seals and mounting hardware?
Yes. This thermostat housing comes with two rubber O-ring seals already installed and mounting hardware. No sensor is included.
At what temperature does the Motorad 860-203 thermostat start to open?
The thermostat in Motorad 860-203 starts to open at 95 °C. It uses a mechanical actuator with a disk valve.
Can coolant stains near the thermostat housing mean the housing is bad?
Yes, they can. With the engine off and cool, look for coolant residue, cracks or wet seams around the housing and seals; a shop can pressure test the cooling system.
Does the Motorad 860-203 replace part number 12670557?
Yes. 12670557 is one of the numbers this housing replaces, along with 12673659 and 12678779.
