Motorad 301-170 Engine Coolant Thermostat

Reliable Engine Coolant Thermostat for Infiniti, Nissan, and Mitsubishi

The Motorad Standard 301-170 engine coolant thermostat is designed to maintain optimal engine temperature for select Infiniti, Nissan, and Mitsubishi vehicles. Engineered to open at 170°F, this thermostat ensures efficient coolant flow and engine performance.

• Sealing flange outside diameter: 2.52 inches
• Height between flanges: 1.66 inches
• Overall height: 2.37 inches
• Standard type thermostat with jiggle pin weep hole
• Includes rubber O-ring gasket for secure sealing
• Bypass diameter: 1.14 inches; bypass length: 1.65 inches
• Flange thickness: 0.05 inches
• Start to open temperature: 170°F
• One seal included; installation tool not included

About the Motorad Standard Product Line

The Motorad Standard line offers dependable replacement parts designed to meet OEM specifications. This engine coolant thermostat from the Standard series provides consistent temperature regulation and reliable sealing, making it suitable for routine maintenance and repairs on compatible vehicles.

Detailed Product Description

The Motorad Standard 301-170 thermostat features a precise opening temperature of 170 degrees Fahrenheit, which helps maintain the engine within its optimal operating range. Its sealing flange outside diameter of 2.52 inches and flange thickness of 0.05 inches ensure a proper fit and secure installation. The included rubber O-ring gasket and jiggle pin weep hole enhance sealing and coolant flow, preventing overheating and coolant leaks. The bypass diameter and length (1.14 inches and 1.65 inches respectively) allow controlled coolant circulation during warm-up phases, improving engine efficiency.

Compatible Vehicles and Applications

• Infiniti Q70 and Q70L
• Nissan Frontier, NV350 Urvan, Pickup
• Mitsubishi 3000GT, Diamante, Montero, Montero Sport

This thermostat is designed specifically for these models, ensuring proper fitment and function.

Common Issues Addressed by This Thermostat

• Engine overheating due to stuck closed thermostat
• Poor engine warm-up from thermostat stuck open
• Coolant leaks caused by worn or damaged seals
• Inconsistent engine temperature regulation
• Reduced fuel efficiency and increased emissions

Installation Notes and Tips

Installation of the Motorad Standard 301-170 thermostat requires removal of the old thermostat and careful cleaning of the housing surface. The included rubber O-ring gasket should be properly seated to prevent leaks. Note that no installation tool is included, so appropriate hand tools are necessary. Verify the thermostat orientation and ensure the jiggle pin weep hole is positioned correctly to allow air bleeding during coolant fill.

Quality Assurance and Warranty

Motorad Standard thermostats are manufactured to meet industry standards for durability and performance. This part includes one rubber seal and is engineered for reliable operation at the specified 170°F opening temperature. While specific warranty details are not provided, Motorad products typically adhere to OEM quality requirements to support long-term vehicle operation.