Rubber Hose Leak Fix With Sinister Diesel Coolant Pipe

Our diesel engines are maintained, cooled, and run, off of fluids. Fluids play a pivotal role in the operating procedures and with that, the hardware they run through often deteriorate and or fail over time. For instance, we’re covering the coolant hoses on the Ram trucks that run from above the thermostat over to the top of the radiator. With the help of Sinister Diesel, our truck will not only look better, but it will also keep us on the road longer, too.
From the factory, these trucks are equipped with the rubber, L-shaped hose and a pair of the full-width clamps. You know, those clamps that are extremely tight and are tough to get off sometimes? Yes, those. The truck we’re working on has right at 100,000-miles and with that many miles, a ton of hot and cold cycles, the hose is starting to deteriorate.

As a matter of fact, it has developed a very small leak. Although it isn’t a life-threatening leak and wouldn’t prevent the truck from driving, at the end of the day, we drive this truck very long distances and don’t want to risk the leak bursting and leaving us dead on the side of the road. So, what’s the fix? Sinister Diesel is the answer.
We are going to install the Sinister Diesel Radiator Pipe that will eliminate this weak point and introduce some good looks under our hood. With its heavy-duty aluminum construction and 4-ply silicone boots, we can rest easy knowing we have many miles and years of reliability to come.
  • Abrasion and crack-resistant 6061 aluminum piping
  • Precision mandrel-bent tubing for a perfect fit
  • 4-Ply Silicone Boots that are rated to 400 PSI
  • Powdercoated and polished in Sinister Blue for a beautiful finish

The install was as simple as it gets. With the truck safely parked, you simply open up the petcock to drain a gallon or two of coolant out of the radiator. This lowers the coolant level enough that when its time to remove the pipe, coolant doesn’t spill everywhere. With the few gallons drained, it’s only a matter of removing those full clamps.

With the clamps removed and a little assistance from a flat-head screwdriver, the hoses pops right off. Although you don’t have to, I took the time to clean up the ports both on the thermostat housing and the radiator to ensure clean connections of the new pipe. Lubricating the hoses isn’t necessary, but I did to make it easier and slipped both hoses on.

With both boots on, it is as simple as slipping the new pipe into place ensuring you’re as far into the hose as possible to prevent future leaks. Now that the hose is on, you take the supplied four clamps and tighten the hose down on to both the pipe ends and the other points of connection. All that remains is refilling the radiator up with the drained coolant and you’re done.

Not only does our truck have better, longer-lasting parts on it, but it also looks way better, too.

We picked up our tools, cleaned up our mess, and started the truck to make sure there were no leaks. Sinister Diesel makes plenty of coolant system upgrades both steel and hose for many applications. This includes the 2003-2007 6.0-Liter Power Stroke trucks and the 2003-2018 RAM trucks. If you’re interested in upgrading your truck, be sure and check out their website. Stay tuned to Diesel Army for more on the latest upgrades in the diesel industry.

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About the author

Artie Maupin

Artie Maupin is from Southeast Missouri and has an extreme passion for anything diesel. He loves drag racing of all kinds, as well as sled pulling competitions.
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