Motorad 821070 Engine Coolant Thermostat

Heavy Duty Cooling Control

Motorad Heavy Duty Thermostat 821070 is an engine coolant thermostat built for demanding cooling systems. It uses OEM-spec materials and processes, with a copper case and wax compound for quick response to coolant temperature changes.

For drivers searching for a 170 degree thermostat for Chevrolet, GMC, or other GM applications, this Motorad thermostat delivers a direct-fit cooling system service part with OE-supplier manufacturing standards.

Key Features

• Engine coolant thermostat set to start opening at 170 Deg. F
• Stainless steel construction for corrosion resistance
• Copper case and wax compound for responsive temperature control
• Heavy duty Motorad thermostat line for demanding cooling systems
• Flange diameter: 2.868 in; bypass plate diameter: 1.41 in
• Height from flange to bottom: 2.56 in; overall height: 3.05 in
• No gasket or seal included
• No jiggle pin, hardware, or installation tool included

Product Details

This Motorad 821070 thermostat regulates coolant flow to help the engine reach and maintain operating temperature. The stainless steel body and copper/wax thermal element are specified for consistent opening response, while the OE-style manufacturing approach supports accurate fit and function in the cooling system. This part cross-references Dorman HELP 14007 for the same application.

Motorad Heavy Duty Thermostat parts are built for service work where stable temperature control matters. If you are replacing a worn thermostat on a Chevrolet or GMC cooling system, 821070 is a practical service part to restore proper coolant regulation.

What It Helps Fix

• Engine running too cool because the thermostat is stuck open
• Overheating caused by a thermostat that does not open correctly
• Slow warm-up after cold starts
• Temperature swings from inconsistent coolant flow control
• Cooling system service needs on Chevrolet and GMC applications

Installation Notes

Replace the thermostat with the correct gasket or seal for the application, since this part does not include one. Inspect the thermostat housing, mating surfaces, and coolant condition before installation. Confirm the 170 Deg. F opening temperature and physical dimensions match the original part before assembly.

For Chevrolet and GMC thermostat replacement jobs, verify housing depth, flange diameter, and bypass plate size to ensure proper seating and coolant flow control. Motorad 821070 is also referenced by part number 821070 during catalog lookup and service matching.

Quality Assurance

Manufactured by an OE supplier using OEM quality materials and safety standards, this thermostat is built to meet OEM specifications and processes. The heavy duty Motorad 821070 design is intended for consistent performance in automotive cooling systems.