Motorad 4087-90 Engine Coolant Thermostat

Heavy Duty Cooling Control

The Motorad Heavy Duty Thermostat 4087-90 is an engine coolant thermostat built for demanding cooling systems. It uses OEM-quality materials and OE-supplier manufacturing standards to deliver consistent temperature control, with a copper case and wax compound for quick response to coolant temperature changes.

For drivers searching for a 190 degree thermostat for Chrysler, Dodge, Jeep, or Ram cooling system service, this Motorad 4087-90 thermostat provides a direct replacement option built around OE specifications.

Key Features

• Engine coolant thermostat set to 190 Deg. F
• Copper case construction for stable thermal performance
• Wax compound helps react quickly to coolant temperature changes
• Manufactured to OEM specifications and processes
• Heavy duty thermostat design for demanding automotive cooling systems
• Part number 4087-90 for easy identification

Product Details

Motorad’s Heavy Duty Thermostat line focuses on OE-style cooling control for vehicles that need dependable temperature regulation under load. The 4087-90 thermostat is engineered with a 1.03 in bypass plate diameter, 2.875 in flange diameter with seal, 2.652 in flange diameter without seal, 1.45 in height from flange to bottom, and 1.82 in height from flange to top of bridge. These dimensions support accurate fitment in the intended housing application.

This thermostat is a practical choice for Chrysler, Dodge, Jeep, and Ram cooling system maintenance when the goal is to restore proper operating temperature control. The Motorad 4087-90 also cross-references Carlson 14239 for the same application.

Common Problems It Can Address

• Engine running too cool or too warm
• Slow coolant temperature response after startup
• Temperature fluctuation during stop-and-go driving
• Cooling system performance loss from a worn thermostat
• Improper engine operating temperature control

Installation Notes

Verify thermostat dimensions, temperature rating, and housing compatibility before installation. Clean the sealing surfaces thoroughly and inspect the thermostat housing, gasket surface, and coolant condition during service. Follow the vehicle service procedure for coolant refill and air bleeding after replacement. Confirm the correct application for your Chrysler, Dodge, Jeep, or Ram model before ordering part number 4087-90.

Quality Assurance

Motorad manufactures this thermostat with OEM-quality materials and OE-supplier standards, using OEM specifications and processes for consistent cooling system performance. The copper case and wax compound are selected to support responsive temperature control in heavy duty use.