Motorad 657-203 Engine Coolant Thermostat

Reliable Engine Coolant Thermostat for Chrysler, Dodge, and Jeep

The Motorad Standard 657-203 engine coolant thermostat is designed to maintain optimal engine temperature for select Chrysler, Dodge, and Jeep models. Engineered with precision, this thermostat ensures efficient coolant flow and temperature regulation to support engine performance and longevity.

• Sealing flange outside diameter: 1.72 inches
• Height between flanges: 1.02 inches
• Overall height: 1.45 inches
• Standard type thermostat with jiggle pin weep hole
• Includes a rubber O-ring gasket for secure sealing
• Start to open temperature: 203°F (95°C)
• Flange thickness: 0.05 inches
• One seal included, made of durable rubber material

About the Motorad Standard Product Line

The Motorad Standard line offers dependable engine cooling components designed to meet OEM specifications. This product line focuses on delivering consistent performance and fitment for a range of vehicles, including the Chrysler, Dodge, and Jeep models compatible with part number 657-203. The Standard line balances quality and value, providing essential features such as integrated jiggle pin weep holes and reliable sealing solutions.

Product Details and Specifications

This engine coolant thermostat features a 1.72-inch sealing flange outside diameter and a 1.02-inch height between flanges, ensuring proper fitment within the cooling system. The thermostat opens at 203 degrees Fahrenheit, allowing coolant to circulate once the engine reaches optimal operating temperature. The included rubber O-ring gasket and jiggle pin weep hole help prevent leaks and air pockets, promoting efficient cooling system operation. The flange thickness of 0.05 inches contributes to a secure and stable installation.

Compatible Vehicles and Applications

• Chrysler Avenger (2007 and later)
• Dodge Caliber
• Chrysler Cirrus
• Jeep Compass
• Dodge Journey
• Jeep Patriot
• Chrysler Sebring

This thermostat is specifically designed for these models, ensuring proper fit and function within their engine cooling systems.

Common Issues Addressed by This Thermostat

• Engine overheating due to stuck closed thermostat
• Poor heater performance from improper coolant flow
• Coolant leaks caused by worn or damaged seals
• Engine temperature fluctuations affecting performance
• Air pockets in the cooling system reducing efficiency

Installation Notes and Tips

Before installation, verify compatibility with your vehicle’s make and model. Ensure the cooling system is drained to prevent spills. Replace the old thermostat and gasket with the Motorad Standard 657-203, making sure the jiggle pin is positioned correctly to allow air bleed. Tighten mounting bolts evenly to avoid flange distortion. No special installation tools are required for this part.

Quality Assurance and Warranty

The Motorad Standard 657-203 thermostat is manufactured to meet industry standards for durability and performance. It includes a rubber O-ring gasket to ensure a reliable seal and prevent leaks. While specific warranty details are not provided, Motorad products typically adhere to OEM quality requirements, offering dependable service life when installed correctly.