Radiator Hose

Q: How long do radiator hoses last, and how do I know mine needs replacing?

Factory rubber hoses typically last 5–10 years or 60,000–100,000 miles before heat cycling starts to harden and crack them, though towing and stop-and-go heat cycles accelerate that timeline. Watch for a hose that looks collapsed or "sucked in" after the truck sits and cools, visible cracking or a mushy feel when squeezed, or a sweet coolant smell near the engine bay. A collapsed hose right after shutdown isn't always the hose itself — a bad radiator cap or a restricted coolant overflow tank can cause the same vacuum symptom, so it's worth ruling those out too.

On modern diesel trucks, the factory radiator hose is often one of the first cooling-system parts to fail. The stock upper hose on 6.7L Cummins and Duramax engines is molded rubber or reinforced plastic that hardens, cracks, and collapses inward under repeated heat-and-cool cycling — especially under towing loads. Evil Energy's upper radiator hose kits replace that factory hose with a rigid 6063 aluminum alloy pipe and 5-ply silicone couplers: a direct radiator hose fix for a failure point your OEM hose was never built to outlast.

Why an Aluminum & Silicone Upper Radiator Hose Outlasts the OEM Hose

Factory rubber hoses collapse because they have nothing rigid inside them — when the engine cools and the system pulls vacuum, a soft hose folds in on itself, and years of heat cycling leave it cracked and brittle long before that. Evil Energy's kits solve this with a rigid aluminum center pipe that can't collapse, connected to 5-ply reinforced silicone couplers that absorb engine vibration and movement at each end. Every kit ships with stainless radiator hose clamps (T-bolt style, the same heavy-duty clamps used on factory turbo and intercooler piping), so there's nothing extra to source before installing. If you're already changing your radiator hose because it collapsed, cracked, or started leaking coolant, this upgrade means addressing that weak point once — not every few years.

Find the Right Upper Radiator Hose for Your Truck

These are direct-fit upper radiator hose replacements engineered around each engine's factory routing, not a universal-fit hose — match your platform below, or cross-reference your OEM part number before ordering:

Truck & Engine	Years	Replaces OEM Part #	Shop
Ram 2500/3500 6.7L Cummins (Standard Output)	2019–2024	68359598AF / AD / AE	Shop the 2019–2024 Cummins SO kit
Ram 2500/3500 6.7L Cummins	2010–2018	68166469 / 68224266 / 55056954 / 68227796 series	Shop the 2010–2018 Cummins kit
Silverado/Sierra 2500HD/3500HD 6.6L L5P Duramax	2017–2019	84094878	Shop the 2017–2019 L5P kit
Silverado/Sierra 2500HD/3500HD 6.6L L5P Duramax	2020–2025	84813629 / 85122989	Shop the 2020–2025 L5P kit
Silverado/Sierra 2500HD/3500HD 6.6L LML Duramax	2011–2016	22884211 / 25874337 / 23455292	Shop the 2011–2016 LML kit

Need a lower radiator hose or a full cooling system refresh instead? Browse our Cooling System for radiators, thermostats, and coolant tanks that pair with these kits.

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FAQs about Radiator Hose

How much does it cost to replace a radiator hose, and is an aluminum kit worth it over a cheaper rubber replacement?

A basic rubber upper radiator hose can run $20–60, while a direct-fit aluminum-and-silicone kit like Evil Energy's runs closer to $130 — but the comparison isn't apples to apples. Rubber hoses on Cummins and Duramax trucks are a known repeat-failure point, so the "cheap" hose often gets replaced more than once. An aluminum pipe can't collapse the way rubber does, so you're paying once for a permanent radiator hose fix rather than budgeting for another roadside repair. If you're already refreshing your cooling system, it's worth pairing with our Evil Energy Radiators to check whether your radiator is due as well.

How long do radiator hoses last, and how do I know mine needs replacing?

Factory rubber hoses typically last 5–10 years or 60,000–100,000 miles before heat cycling starts to harden and crack them, though towing and stop-and-go heat cycles accelerate that timeline.

Watch for a hose that looks collapsed or "sucked in" after the truck sits and cools, visible cracking or a mushy feel when squeezed, or a sweet coolant smell near the engine bay.

A collapsed hose right after shutdown isn't always the hose itself — a bad radiator cap or a restricted coolant overflow tank can cause the same vacuum symptom, so it's worth ruling those out too.

How do I replace my upper radiator hose, and do I need special clamps?

The process mirrors a standard hose swap: let the engine cool, drain the coolant, disconnect the factory hose at the radiator and engine ends, install the new hose or pipe, and torque the clamps before refilling and bleeding the system. Evil Energy's kits include stainless T-bolt radiator hose clamps in the box, so there's nothing extra to buy. If you're flushing the system while you're in there, our complete guide to hoses and fittings covers how coolant hoses fit into the rest of the system.

Why does my upper radiator hose keep collapsing or cracking, and will an aluminum hose actually fix it for good?

Rubber and plastic hoses have no rigid structure inside them, so when the engine cools and the system pulls vacuum, a soft hose folds inward — and years of heat cycling leave it brittle enough to crack even without a vacuum event. Because it happens repeatedly on the same platforms, it's a known weak point rather than a one-off defect. A rigid aluminum pipe physically can't collapse the way rubber does, which is why this is a permanent fix rather than a temporary patch.

Will this Radiator Hose fit my exact truck？

Match your truck's year, engine, and drivetrain to the fitment table above, or cross-reference the OEM part number stamped on your factory hose against the numbers listed for each kit — this matters because some model years (like 2013–2015 dual-radiator Cummins trucks) use different routing than standard single-radiator setups.

If you're not sure which kit applies to your build, contact our support team with your VIN or engine option before ordering.

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