Motorad 301-170 Engine Coolant Thermostat

Engine Coolant Thermostat for OE-Style Cooling Control

The Motorad Standard 301-170 engine coolant thermostat is built for precise temperature control in demanding cooling systems. It uses OEM-quality materials and OE-supplier manufacturing processes to deliver consistent opening response at 170°F for select Infiniti, Nissan, and Mitsubishi applications.

For drivers servicing a 3000GT, Montero, Frontier, or Q70, this thermostat provides a direct-fit replacement with the seal included and an OE-style design that supports stable coolant flow control.

Key Features

• Start-to-open temperature: 170°F
• Standard thermostat design for OE-style replacement
• Copper case and wax compound for responsive temperature changes
• Offset design with air relief valve where applicable
• Includes gasket/seal with rubber O-ring seal type
• Jiggle pin weep hole for air bleeding
• Motorad Standard 301-170 for select Nissan, Infiniti, and Mitsubishi vehicles

Detailed Product Description

Motorad Standard 301-170 is an engine coolant thermostat engineered to match OEM specifications and processes. The copper case and wax compound are used to react quickly to coolant temperature changes, helping the cooling system regulate engine operating temperature with consistent opening behavior. The thermostat includes a rubber seal and is built with an OE-style sealing approach for applications that require a direct replacement.

This part cross-references Carlson 15117 and TYC 30170 for the same application. It is a fitment-based replacement for vehicles including the Mitsubishi 3000GT, Mitsubishi Montero, Nissan Frontier, and Infiniti Q70, making it a practical choice when servicing factory-style cooling systems. The Motorad 301-170 is also listed for Mitsubishi Diamante, Montero Sport, Nissan Pickup, and Nissan NV350 Urvan applications.

Common Problems This Part Can Address

• Engine running cooler or hotter than normal due to thermostat wear
• Delayed coolant circulation after cold start
• Temperature fluctuation caused by a sticking thermostat
• Coolant flow issues related to a damaged seal or gasket
• Air trapped in the cooling system during thermostat service

Installation Notes and Tips

Install the thermostat with the jiggle pin weep hole oriented as required by the vehicle service procedure so trapped air can escape. Inspect the housing, sealing surfaces, and coolant condition before installation, and replace any worn O-ring or seal surfaces as needed. Verify the 170°F temperature specification against the vehicle’s original equipment requirement before installation on applications such as the Infiniti Q70, Nissan Frontier, or Mitsubishi Montero.

Quality Assurance

Motorad manufactures this thermostat with OEM-quality materials and safety standards as an OE supplier. It is built to OE specifications and processes for dependable fit and temperature control in select cooling system applications.