Fleece Coolant Bypass Automatic Transmission (FPE-CLNTBYPS-CUMMINS-0607) for 2006-2007 Cummins 5.9L
$376.95
The Fleece Performance Coolant Bypass Kit (FPE-CLNTBYPS-CUMMINS-0607) is a premium aftermarket solution tailored for 2006-2007 Dodge Ram trucks powered by the 5.9L Cummins diesel engine. Engineered to resolve the issue of uneven cooling—particularly in the rear cylinders—this kit reroutes coolant flow to provide balanced temperature regulation throughout the engine block. By enhancing coolant circulation, it helps prevent common problems such as head gasket failures and contributes to prolonged engine life. The kit includes a high-quality thermostat and durable braided stainless-steel lines, ensuring both performance and longevity. Whether for heavy-duty workloads or high-performance setups, the Fleece coolant bypass kit is an excellent upgrade for Cummins owners seeking improved engine reliability and efficiency.
The Fleece Performance Coolant Bypass Kit (FPE-CLNTBYPS-CUMMINS-0607) is a high-quality aftermarket upgrade designed specifically for 2006-2007 Dodge Ram trucks equipped with the 5.9L Cummins diesel engine. This coolant bypass system addresses a common issue with uneven cooling, particularly at the rear cylinders of the engine, by rerouting coolant flow to ensure more consistent temperature control across the entire engine block. By improving coolant circulation, the bypass helps reduce the risk of head gasket failures and contributes to overall engine longevity. Additionally, this kit includes a high-quality thermostat and braided stainless-steel lines for durability and reliability. Ideal for high-performance or heavy-duty applications, the Fleece coolant bypass kit is a smart investment for Cummins owners looking to enhance engine efficiency and reliability.
| Weight | 5.35 lbs |
|---|---|
| Dimensions | 12.5 × 9.5 × 4.5 in |
Fitment
- 2006 Dodge Ram 2500/3500 5.9L 24V Cummins
- 2007 Dodge Ram 2500/3500 5.9L 24V Cummins
Features
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 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.
*US Trademark Reg. No. 6099979, 6099980, 6099981 and 7659022.
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.
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