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Fleece Cummins Coolant Bypass Kit (2006-2007 Auto Trans) w/ Stainless Steel Braided Line

Thoroughbred Sku #: FPE-CLNTBYPS-CUMMINS-0607-SS

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$359.00

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Product Details

Product Name: Fleece Performance Coolant Bypass Kit (Coolant Hose Braiding - Stainless Steel) - 2006-2007 Dodge Cummins 5.9L Automatic
Manufacturer: Fleece
Manufacturer Part #: FPE-CLNTBYPS-CUMMINS-0607-SS
Thoroughbred Diesel Part #: FPE-CLNTBYPS-CUMMINS-0607-SS
Fitment Notes: 2006-2007 Dodge Cummins 5.9L Automatic

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 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. 

Fleece Performance Coolant Bypass Kit Features:

  • 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.
  • EO# D-834-9
  • 1 Year Limited Parts Warranty
  • For more information on Fleece call us at 1-859-737-4966.

Reviews

  • Hello, Question on Fleece Coolant Bypass. I have a 2006 Ram 2500, automatic, with a rusty Y tube. Can I just delete the trans cooler tubing, plug the ports, and use the new heater core tube without the rear t-stat set-up? Just a every day driver. Thank you, Jay

    Jay E. Werner | 7/19/2021

    Here is the installation manual.

  • Does this kit include the heater core tube as shown in video?

    JStorer | 1/13/2022

    No. Fleece does not include that tube any longer.