Help eliminate the possibility of scored rear cylinders and blown freeze plugs with this Coolant Bypass Kit from Fleece! The Fleece Coolant Bypass with Stainless Lines solves the problem of excessive coolant pressure before it becomes a problem. The integrated secondary thermostat locates at the back of the block and allows coolant to flow freely when at normal operating temperatures ensuring consistent temperatures across all six cylinders and eliminates excessive pressure. The kit comes with high quality AN o-ring fittings and AN hose connections with braided hose to ensure a leak free installation and installs in two hours or less!
Increased Coolant Flow, Decreased Coolant Temperatures - The rear cylinders on the 12 Valve 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. Fleece's 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 12 valves 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.
California Air Resource Board
D-834-9
Increased Coolant Flow, Decreased Coolant Temperatures - The rear cylinders on the 12 Valve 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. Fleece's 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 12 valves 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.
California Air Resource Board
D-834-9
Specifications
- SkuFPE-CLNTBYPS-CUMMINS-12V-SS
- ManufacturerFleece Performance Engineering
- MPNFPE-CLNTBYPS-CUMMINS-12V-SS
FEATURES & BENEFITS:
- Lowers coolant temperature at the rear cylinders
- Ensures consistent temperatures across all cylinders
- Prevents damaging coolant pressure build up
- Complete kit comes with Stainless Steel braided hose and AN O-ring fittings to ensure a leak-free installation.
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Fleece Performance Coolant Bypass Kit W/Stainless Braided lines 94-98 12 Valve Cummins
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