Product Description:

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 and up 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.
Application Notes:

• The 2003 - 2007 5.9L automatic transmission version will eliminate the factory transmission fluid heat exchanger. The heat exchanger is 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.
• For model years 2007 - 2018 6.7L trucks, including both automatic and manual equipped transmissions, factory installed transmission fluid heat exchangers are uncommon. For customers with a 6.7L that has a heat exchanger, a heater tube can be purchased at your local Chrysler Dealership [PN:68048997AA] to complete the installation.

Additional Information:

Not CARB legal: Not for sale or street use in CA & CARB states.

title: Cummins Coolant Bypass Kit 06-07 Auto Trans with Stainless Steel Braided Line Fleece Performance
color_l: aUSA
diameter:
engine_generation:
engine_manufacturer: Cummins
engine_version:
finish_l:
fuel_type: Diesel
liter: 5.9 Liter|6.7 Liter
location:
material_l:
prop_65_warning: CALIFORNIA WARNING: Cancer and Reproductive Harm -www.P65Warnings.ca.gov
pulley_color:
rwhp_max_rating:
series:
sold_as: Kit
style:
transmission_type: Automatic
universal: No
warranty:
vehicle_type: Truck/SUV
engine_year: 2006-2007

Guaranteed Fitments:

2006,2007,Dodge,Ram 3500,Laramie
2006,2007,Dodge,Ram 2500,Laramie
2006,2007,Dodge,Ram 2500,SLT
2006,2007,Dodge,Ram 3500,SLT
2006,2007,Dodge,Ram 2500,Sport
2006,2007,Dodge,Ram 3500,Sport
2006,2007,Dodge,Ram 2500,ST
2006,2007,Dodge,Ram 3500,ST
2006,2007,Dodge,Ram 2500,TRX4
2007,2007,Dodge,Ram 3500,TRX4