Motorad MRD103 Engine Coolant Thermostat

Racing Thermostat for Performance Cooling

The Motorad Racing Thermostat MRD103 is built for high-performance cooling control in demanding street and track use. It is a standard-style engine coolant thermostat with a 160-degree opening temperature, an O-ring seal, and a jiggle pin weep hole for controlled coolant flow and air bleeding.

Key Features

• 160-degree start-to-open temperature for performance cooling setups
• Racing thermostat design for high-pressure, high-horsepower use
• OE-grade construction from a leading thermostat supplier
• Includes thermostat and seal for the listed applications
• Copper and steel construction with brass and silver finish details
• O-ring seal type with rubber sealing material

Detailed Description

Motorad MRD103 is part of the Racing Thermostat line, a product family focused on performance cooling control rather than basic replacement service. The thermostat is engineered for applications that see sustained load, higher cylinder pressure, and elevated heat, while still maintaining the cooling response needed for street use. Its standard design, OEM grade type, and 160-degree opening point make it a fitment-focused choice for owners looking for a performance thermostat for Dodge Durango, Ram 1500, and Jeep Grand Cherokee applications, among others. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Address

• Excessive coolant temperature during hard driving
• Delayed coolant circulation in performance applications
• Heat management concerns in modified engines
• Inconsistent thermostat opening behavior
• Seal-related coolant leakage at the thermostat housing interface

Installation Notes and Tips

Verify the thermostat housing style and sealing surface before installation. This thermostat uses an O-ring seal and requires a gasket or seal for installation, which is listed in the product data. Confirm the 160-degree opening specification and match the application to the exact vehicle listing, such as Fits 2003-2010 Dodge Ram 1500, N/A or Fits 2005-2021 Jeep Grand Cherokee, N/A. Fitment also includes Dodge Charger, Chrysler 300, Ram 2500, and Dodge Challenger applications across the listed years.

Quality Assurance

Motorad states that this Racing Thermostat is manufactured by a leading OE thermostat supplier and built to handle high-pressure, high-horsepower demands. The MRD103 is an OEM-grade thermostat designed for performance cooling consistency in the listed applications.