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SKU:

FPE-CLNTBYPS-CUMMINS-12V

Special Price $379.00 Regular Price $397.95

Fleece Performance FPE-CLNTBYPS-CUMMINS-12V Coolant Bypass for 5.9L 12V Cummins 1994-1998

Coolant Bypass for 5.9L 12V Cummins 1994-1998

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.
Why do I need a Fleece Performance 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 Performance Coolant Bypass is one of the most important additions you make to improve the reliability and longevity of the Cummins platform.

Fleece Performance - FPE-CLNTBYPS-CUMMINS-12V - Features


Lowers coolant temperature at the rear cylinders	Prevents damaging coolant pressure build up
Ensures consistent temperatures across all cylinders	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

Manufacturer's Part Number	FPE-CLNTBYPS-CUMMINS-12V
Manufacturer Name	Fleece Performance
UPC	635909310464
Shipping Weight	10.00 lbs
Prop 65 Warning	Cancer & Reproductive Harm - P65Warnings.ca.gov
Warranty	1 Year Limited Parts Warranty

Instructions for Coolant Bypass Cummins 1994-1998 12V	Click to View

More Information
Truck Applications	Dodge 12V 1994-98
SKU	FPE-CLNTBYPS-CUMMINS-12V
Manufacturer	Fleece Performance Engineering
Weight	10.00