5292712 190°F Thermostat w/ O-Ring for Cummins ISB6.7 4929643 4929644 3974371

190°F Thermostat with O-Ring for Cummins

This 190°F thermostat with a compatible O-ring, referencing OEM numbers 5292712, 4929643, 4929644, and 3974371, manages coolant flow for Cummins ISB6.7 diesel engines. It provides a complete replacement kit to keep the engine at the correct temperature and prevent leaks.

Overview

This 190°F thermostat with O-ring for Cummins is a direct replacement component for the ISB6.7 engine's cooling system, regulating coolant temperature. It includes the necessary O-ring for a proper seal, simplifying the swap and reducing the risk of post-service leaks. This thermostat set is built for the specific thermal demands of the 6.7L ISB diesel platform.

Built For Performance

• Thermostat opens at 190°F for precise engine temperature control
• Assembled with the matching O-ring for a secure, leak-resistant fit
• Directly cross-references OEM part numbers 5292712, 4929643, and 4929644
• High-quality materials resist corrosion and thermal fatigue
• Meets factory specifications for flow rate and pressure relief

Fits These Machines

• for Cummins ISB6.7 engine series
• for Cummins 6.7L ISB diesel engine used in 2008-2014 applications

On-The-Job Use

• Replacing a thermostat during a scheduled cooling system overhaul in a Ram pickup with the 6.7L Cummins
• Fixing temperature fluctuation issues in a delivery truck or work van powered by the ISB6.7
• Rebuilding a cooling system after a head gasket or water pump replacement
• Performing preventive maintenance on a high-mileage ISB6.7 to avoid overheating failures

Specs At A Glance

Good To Know

Q: Is the O-ring pre-installed or separate? A: The O-ring is included with the thermostat and is designed to be fitted during installation, ensuring a fresh seal. This eliminates the need to purchase a separate gasket when replacing the thermostat.

Q: Will this thermostat work without any modifications? A: Yes, this part is designed as a direct replacement for the OEM thermostat in the ISB6.7, matching the factory 190°F rating. However, always confirm engine serial number compatibility before installation.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.