FLEECE FPE-CLNTBYPS-CUMMINS-VP VP COOLANT BYPASS KIT 1998.5-2002

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.

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.

DETAILED FITMENT:

• 1998-2002-Dodge-Ram 2500
• 1998-2002-Dodge-Ram 3500-

  The Fleece FPE-CLNTBYPS-CUMMINS-VP Coolant Bypass Kit is an essential upgrade for Dodge Ram models from 1998.5 to 2002 equipped with the 5.9L and 6.7L Cummins engines. Recognizing the unique challenges of coolant flow, particularly in the rear cylinders, this innovative kit addresses a critical pain point that often leads to overheating and major engine failures.
  
  By introducing a secondary thermostat that operates based on temperature rather than excess pressure, this bypass kit ensures optimal coolant circulation. This proactive design lowers the coolant temperature in the rear cylinders, greatly reducing the risk of excessive pressure build-up that can lead to the catastrophic failure of freeze plugs. The result is a more reliable and longer-lasting engine performance, essential for any serious Cummins enthusiast.
  
  Installation is straightforward with the included complete kit, which features a braided hose and AN O-ring fittings, ensuring a secure and leak-free fit. Moreover, for models from 2003 and up, the included billet hose brackets enhance durability and ease of installation.
  
  Elimination of the factory transmission fluid heat exchanger is particularly beneficial for the 03-07 5.9L automatic versions, especially in warm climates or high horsepower applications. This enhancement not only simplifies the cooling system but also maintains overall truck performance without the complications posed by unnecessary components.
  
  Whether you drive a 1998-2002 Dodge Ram 2500 or 3500, investing in the Fleece Coolant Bypass Kit will improve cooling efficiency, enhance engine reliability, and ultimately extend the life of your Cummins engine. Ensure your truck performs at its best, no matter the conditions, with this critical addition to your cooling system.