Description
Product Overview
Stop the notorious 6.7L Cummins coolant bypass hose leak permanently with this Billet Aluminum Coolant Bypass Hose Barb Adapter from iFJF. The OEM plastic barb fitting on 2009-2019 Ram 2500/3500 Cummins engines is a well-known weak point — repeated heat cycling causes the plastic to become brittle, crack, and eventually leak coolant. This can leave you stranded with an overheating engine. Our CNC-machined billet 6061-T6 aluminum adapter is a direct bolt-on replacement that eliminates this failure point for good.
This complete repair kit includes the billet aluminum adapter plus new hose clamps, replacement O-rings, and hose sections — everything needed for a permanent, leak-free repair in one package.
Why the OEM Plastic Barb Fails
The factory coolant bypass hose barb is made of glass-reinforced nylon plastic. While adequate when new, years of exposure to coolant at 190-210°F operating temperatures — combined with the constant vibration of the Cummins diesel engine — causes the plastic to degrade. The result is a sudden coolant leak that can rapidly drain your cooling system, leading to engine overheating and potential head gasket damage. This is one of the most common failure points on 2009-2019 Ram Cummins trucks.
Key Features
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Billet 6061-T6 Aluminum Construction — CNC-machined from solid aerospace-grade aluminum for permanent durability
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Direct OEM Replacement — Same dimensions and fittings as the factory part; no modifications required
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Eliminates Plastic Barb Failure — No more cracked, brittle, or leaking OEM plastic fittings
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Corrosion-Resistant Finish — Engineered to withstand coolant exposure and engine bay conditions
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Precision CNC Machining — Tight tolerances ensure a perfect, leak-free seal with OEM hoses
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Lifetime Durability — Aluminum barb will outlast multiple OEM plastic replacements
Compatibility
| Year |
Make |
Model |
Engine |
| 2009-2018 |
Ram (Dodge) |
2500 / 3500 |
6.7L Cummins Turbo Diesel |
| 2019 |
Ram |
2500 / 3500 |
6.7L Cummins Turbo Diesel |
Technical Specifications
| Specification |
Detail |
| Material |
CNC-Machined Billet 6061-T6 Aluminum |
| Finish |
Corrosion-Resistant |
| Fitment |
2009-2019 Ram 6.7L Cummins |
| Installation Time |
30-60 Minutes |
| Installation Difficulty |
Intermediate (Basic Hand Tools) |
Frequently Asked Questions
Q: Does this fix the common coolant leak on my 6.7L Cummins?
A: Yes. The OEM coolant bypass hose uses a plastic barb fitting that becomes brittle over time and eventually cracks, causing a coolant leak. Our billet aluminum adapter permanently replaces this failure-prone plastic part.
Q: Is installation difficult?
A: Installation is straightforward for anyone with basic mechanical skills. It typically takes 30-60 minutes with common hand tools. You'll need to drain some coolant before removing the old fitting — always work on a cool engine.
Q: Will this fit my 2009-2019 Ram 6.7L Cummins?
A: Yes. This adapter fits all 2009 through 2019 Ram 2500 and 3500 trucks equipped with the 6.7L Cummins turbo diesel engine.
Q: What material is the adapter made from?
A: CNC-machined from billet 6061-T6 aluminum with a corrosion-resistant finish. Unlike the OEM plastic barb that degrades from heat cycling, our aluminum adapter will last the lifetime of your engine.
Q: Do I need any special tools?
A: Basic hand tools are all you need — socket set, pliers, flathead screwdriver, and a coolant catch pan. Some models may benefit from hose clamp pliers for tight spaces.
Q: What's the difference between the adapter only and the complete kit?
A: The adapter-only option includes just the billet aluminum barb fitting. The kit includes the adapter plus new hose clamps, O-rings, and replacement hose sections for a complete, leak-free installation.
Why Choose iFJF?
iFJF specializes in solving the common failure points on diesel trucks. Our coolant bypass adapter is engineered by diesel owners, for diesel owners — we understand what fails and how to fix it permanently. Every product is backed by our commitment to quality and responsive US-based customer support.
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