If you’ve ever been elbows deep in your truck’s fuel system and realized the kit instructions don’t tell you half of what you actually need to know, this video will save you the headache. We’re walking through a full AirDog and sump install on a 24 valve Cummins, showing how to get it done clean, tight, and built to last.
The first step is simple but overlooked, checking every part before you start. We lay everything out, make sure the fittings, bolts, and O rings are there, and talk about how to plan the job so you’re not running back and forth once the tank’s open. From there we pick the sump location, mark it, and drill it so the truck can keep feeding clean fuel even when you’re on the throttle. There’s a reason we offset the sump toward the back of the tank, and once you see it, it makes sense.
Next up, we mock up the AirDog and figure out the best mounting spot, something that clears the frame and gives you straight suction. Tight 90s on the suction side just cause cavitation, and that’s the last thing a VP44 needs. You’ll see how we line up the bracket, measure for hose length, and space out the clamps so nothing rubs or leaks down the road. It’s not complicated, but taking the time to do it right means you’ll only do it once.
We pull the stock fuel filter and lift pump, show you where to block off the old bracket, and talk through the easy mistake that causes leaks later. Once that’s done, we tidy up the wiring and shorten the harness so it fits the truck instead of hanging everywhere. When it’s wired clean and clamped tight, you know it’ll work and you won’t be chasing electrical gremlins later.
After everything’s mounted and plumbed, we move on to bleeding the system. This is where a lot of guys waste time cranking forever. We bump the starter a few times, listen for the AirDog to bog down, and check fuel pressure before lighting it off. Once it starts, the pump runs smooth, pressure holds steady, and that VP44’s finally getting the consistent supply it’s been missing.
The whole point of doing an AirDog and sump upgrade like this is reliability. You don’t want to worry about starving your pump halfway through a pull or towing run. You want a steady, clean feed of fuel every time you hit the key. Doing it right once saves you hours later, and it makes a big difference in how the truck drives and holds up.
If you’re the type of guy who likes working on his own rig, the one who doesn’t cut corners, doesn’t like leaks, and wants his truck to look like it was built that way, you’ll get something out of this one. It’s just real shop work, step by step, showing how we’d do it for our own trucks. No shortcuts, no guessing, just solid diesel know how that works.
By the end of the video, you’ll know how to drill and seal a sump, mount and align an AirDog, route and secure fuel lines, delete the stock pump and filter, wire everything clean, and bleed it for a perfect first start. More importantly, you’ll understand why each step matters, the stuff that keeps a VP44 alive and happy.
If you care about doing things the right way and want your Cummins to keep pulling strong, this is worth watching. Subscribe for more shop floor diesel content every week.
Power Driven Diesel is a specialty performance shop engaged in the engineering and development of high-performance turbo diesel technologies.
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