Skip to product information
1 of 5

Fleece Performance

Fleece Performance 94-98 Dodge 5.9L Cummins 12V Coolant Bypass Kit

Fleece Performance 94-98 Dodge 5.9L Cummins 12V Coolant Bypass Kit

Regular price $379.00 USD
Regular price Sale price $379.00 USD
Sale Sold out
Quantity
Increased Coolant Flow, Decreased Coolant Temperatures The rear cylinders on the 5.9/6.7L Cummins suffer from a lack of coolant flow, and therefore, experience the highest coolant temperatures. This can cause excessive pressure to build in the cooling system, especially the rear of the block and blow out freeze plugs externally, or the smaller diameter plugs under the valve cover, leading to a failure. Our coolant bypass kit adds a secondary thermostat, that unlike other brands, works based on temperature instead of excessive pressure. This solves the problem before pressure becomes an issue by ensuring consistent temperatures across all six cylinders. Benefits: Lowers coolant temperature at the rear cylinders Ensures consistent temperatures across all cylinders Prevents damaging coolant pressure build up Complete kit comes with braided hose and AN O-ring fittings to ensure a leak-free installation. Kits for MY 2003+ include billet hose brackets. Why do I need a Fleece Coolant Bypass? One of the biggest issues on the 5.9/6.7L Cummins is the coolant flow problem to the rear cylinders. This can cause catastrophic failure or blow outs of the freeze plugs in an over-temperature / over-pressure condition. The Fleece Coolant Bypass is one of the most important additions you make to improve the reliability and longevity of the Cummins platform. The '03-'07 5.9L automatic transmission version will eliminate the factory transmission fluid heat exchanger. The heat exchanger is not a fluid cooler, it was designed for use in cold climates to warm the transmission fluid with the engine coolant. It is not necessary for use in warm climates or high horsepower applications, nor does it detrimentally affect the trucks performance when removed. All 07-13 6.7 trucks, both automatic and manual equipped transmissions, do not have a transmission fluid heat exchanger. Recommended Cross Sell Skus - FPE-HX35-63-FMW
  • Complete kit comes with braided hose and AN O-ring fittings to ensure a leak-free installation
  • Ensures consistent temperatures across all cylinders
  • Lowers coolant temperature at the rear cylinders
  • Prevents damaging coolant pressure build up

The Fleece Performance coolant bypass kit is designed specifically for the 5.9L Cummins engines in Dodge Ram trucks from 1994 to 1998, providing a crucial upgrade to address coolant flow issues that affect rear cylinders. This kit enhances engine cooling efficiency by adding a secondary thermostat that operates based on temperature, ensuring uniform coolant temperature across all cylinders. Proper coolant flow reduces the risk of excessive pressure buildup, which can lead to blowouts of freeze plugs and costly engine damage. The comprehensive kit includes braided hoses and AN O-ring fittings for a secure, leak-free installation, with billet hose brackets included for MY 2003+ models, ensuring durability and ease of setup. Maintaining optimal coolant temperatures is vital for engine longevity, especially in high-demand or towing applications, and this bypass system helps prevent overheating at the rear cylinders while promoting consistent engine performance. The design also eliminates the factory transmission fluid heat exchanger in certain models, simplifying the cooling system and reducing potential failure points without compromising vehicle operation. This upgrade is essential for owners seeking improved reliability and extended engine life in their Dodge Cummins trucks. The kit's compatibility with a range of Dodge Ram models from 1994 to 1998 makes it a versatile solution for enhancing cooling performance across various configurations, ensuring your vehicle operates smoothly under demanding conditions. Whether you're restoring an older model or upgrading for increased durability, the Fleece Performance coolant bypass kit offers a practical, high-quality solution to common cooling challenges faced by Cummins owners.

Features:

  • Adds a secondary thermostat that operates based on temperature, not pressure
  • Ensures consistent coolant temperatures across all cylinders
  • Lowers coolant temperature at the rear cylinders
  • Prevents damaging coolant pressure buildup
  • Includes braided hoses and AN O-ring fittings for leak-free installation
  • Kit for MY 2003+ models includes billet hose brackets
  • Designed specifically for 5.9L Cummins engines in Dodge Ram trucks from 1994 to 1998
  • Eliminates factory transmission fluid heat exchanger in certain models for improved cooling efficiency
  • Improves engine reliability and longevity by addressing coolant flow issues

Fitment:
1994 Dodge Ram 2500 Base
1994 Dodge Ram 3500 Base
1995 Dodge Ram 2500 Base
1995 Dodge Ram 3500 Base
1996 Dodge Ram 2500 Base
1996 Dodge Ram 3500 Base
1997 Dodge Ram 2500 Base
1997 Dodge Ram 3500 Base
1998 Dodge Ram 2500 Base
1998 Dodge Ram 3500 Base
Air Freight Prohibited: false
Not Carb Approved: false
Ltl Freight Required: false
Prop 65: Y
Part Type: automotive
Epa: Compliant
Carb Acknowledgement Required: false
Carb Eo Number: D-834-9
Regular Stock: t
Units Per Sku: 1

View full details