Motorad 5426-190 Engine Coolant Thermostat

Reliable Engine Coolant Thermostat for Dodge Ram 2500 and 3500

The Motorad UltraStat 5426-190 engine coolant thermostat is designed to maintain optimal engine temperature for Dodge Ram 2500 and Ram 3500 models. Engineered with precision, this thermostat ensures efficient coolant flow and temperature regulation to support engine performance and longevity.

Key Features of Motorad UltraStat 5426-190 Thermostat

• Sealing flange outside diameter: 2.28 inches for secure fitment
• Includes a rubber gasket/seal for reliable sealing
• Jiggle pin weep hole to prevent air lock and ensure proper coolant circulation
• Bypass diameter of 1.14 inches and bypass length of 1.10 inches for controlled coolant flow
• Flange thickness of 0.05 inches for durability and proper mounting
• Thermostat opening temperature set at 192 degrees Fahrenheit for accurate engine temperature control
• Single seal design to maintain coolant system integrity

Detailed Description of the UltraStat Engine Coolant Thermostat

The Motorad UltraStat 5426-190 thermostat is part of the UltraStat product line, known for precise temperature regulation and reliable sealing components. This thermostat features a 192°F opening temperature, which is critical for maintaining the correct engine operating temperature in Dodge Ram 2500 and 3500 trucks. The included rubber gasket ensures a tight seal at the 2.28-inch sealing flange, preventing coolant leaks. The jiggle pin weep hole allows trapped air to escape, reducing the risk of overheating due to air pockets. With a bypass diameter of 1.14 inches and length of 1.10 inches, this thermostat supports proper coolant circulation during engine warm-up and normal operation.

Applications and Common Issues Addressed

• Regulates engine temperature to prevent overheating in Dodge Ram 2500 and 3500
• Prevents coolant leaks with included rubber gasket seal
• Reduces air lock issues in the cooling system via jiggle pin weep hole
• Maintains consistent coolant flow with precise bypass dimensions
• Supports engine efficiency and longevity by ensuring proper thermostat operation

Installation Notes and Tips

Ensure the sealing flange surface is clean and free of debris before installation to maximize gasket sealing effectiveness. The Motorad UltraStat 5426-190 thermostat does not include an installation tool, so use appropriate hand tools to avoid damage. Verify the thermostat orientation matches the vehicle’s cooling system design, especially the jiggle pin weep hole position, to allow proper air venting. Replace the gasket with the included rubber seal to prevent leaks and ensure a secure fit.

Quality Assurance and Warranty Information

Motorad UltraStat thermostats are manufactured to meet OEM specifications for fit and function. The 5426-190 thermostat undergoes rigorous quality control to ensure durability and reliable temperature regulation. While specific warranty details are not provided, Motorad products typically come with standard manufacturer warranties covering defects in materials and workmanship.