Dealing with a 2014 6.7 cummins turbo replacement isn't exactly how most people want to spend their weekend, but if you're feeling a sudden loss of power or hearing a weird siren sound under the hood, it's probably time to face the music. These trucks are absolute workhorses, but the Variable Geometry Turbo (VGT) setup on the 6.7-liter engines eventually gets tired. Whether it's soot buildup sticking the vanes or the actuator finally giving up the ghost, knowing what you're getting into before you start spinning wrenches can save you a massive headache.
Why These Turbos Give Up
Before you go ripping parts off, it helps to understand why these specific units fail. The HE351VE turbo used in the 2014 Ram 2500 and 3500 is a pretty complex piece of machinery. Unlike an old-school fixed-vane turbo, the VGT uses a sliding ring to change the exhaust housing's volume. This gives you that quick spool-up at low RPMs and helps with exhaust braking.
The downside? Soot. If you do a lot of idling or short trips where the engine doesn't get up to operating temp, that carbon builds up inside the turbo. Eventually, the vanes get stuck. Your truck might throw a code for the turbocharger actuator, or you might notice the exhaust brake just isn't "biting" like it used to. Sometimes you can just replace the actuator, but if the internal mechanicals are seized, a full 2014 6.7 cummins turbo replacement is the only real fix.
Picking Your Replacement
When you're shopping for a new unit, you've got a couple of paths to take. You can go with a straight-up OEM Holset replacement, which is the safest bet if you want the truck to behave exactly like it did the day it rolled off the lot.
However, a lot of guys use this as an opportunity to upgrade. There are "drop-in" aftermarket turbos that offer better airflow and more robust internal components without requiring a bunch of custom tuning. Then, there's the "VGT delete" route, where you swap to a second-gen style fixed-vane turbo. Just keep in mind that going that route usually requires custom tuning and you'll lose your factory exhaust brake. For most daily drivers and guys who tow, sticking with a high-quality VGT replacement is usually the way to go.
Getting the Workspace Ready
First things first: this isn't a job you want to do in a cramped, dark driveway if you can help it. You're going to be leaning over the passenger side fender for a long time. Grab a fender cover or an old moving blanket so you don't scratch your paint or ruin your back.
You're also going to want to soak everything in a good penetrating oil—like PB Blaster or Liquid Wrench—at least a day before you start. The heat cycles these engines go through turn exhaust bolts into literal rust-welds. Trust me, spraying them down 24 hours in advance will save you from snapping a stud off in the manifold, which is a nightmare you definitely want to avoid.
Tools You'll Definitely Need
- A good set of deep and shallow sockets (metric is the name of the game here).
- Wobble extensions (these are lifesavers for the lower mounting nuts).
- A torque wrench (don't guess on the oil line or mounting bolts).
- Plenty of shop rags and some brake cleaner.
- A drain pan for the coolant that's going to inevitably spill.
The Tear-Down Process
To get started on your 2014 6.7 cummins turbo replacement, you have to clear some room. Remove the air intake assembly and the crankcase ventilation (CCV) hose. You'll also need to disconnect the electrical connector for the turbo actuator. Be careful with these plastic clips; they get brittle from the engine heat and snap if you look at them wrong.
Next, you've got to deal with the plumbing. The 6.7 Cummins turbo is water-cooled and oil-lubricated. You'll need to disconnect the coolant lines and the oil feed/drain lines. The oil drain line (the big one on the bottom) can be a bit of a pain to get back on later, so pay attention to how it sits. You'll also need to unclamp the downpipe from the back of the turbo and the intercooler pipe from the front.
The hardest part is often the four mounting nuts that hold the turbo to the exhaust manifold. The ones on the bottom are notoriously hard to reach. This is where those wobble extensions and maybe a bit of colorful language come into play. Once those are off, the turbo is ready to come out. Just a heads-up: it's heavier than it looks. It's about 50-60 pounds of awkward cast iron, so watch your fingers.
Prepping the New Turbo
Before you drop the new unit in, compare it side-by-side with the old one. Make sure all the ports look the same and that the actuator is clocked correctly if you're using an aftermarket unit.
One of the biggest mistakes people make during a 2014 6.7 cummins turbo replacement is "dry starting" the new turbo. You must prime the new turbo with clean engine oil before you install the feed line. Just take a small oil can and pour a bit into the oil feed hole while spinning the compressor wheel by hand. This ensures the bearings have lubrication the very second the engine fires up. Without this, you could damage the new bearings before you even leave the driveway.
The Re-Installation
Putting it back together is basically the reverse of taking it apart, but with more focus on gaskets. Always use new gaskets for the exhaust manifold, the oil drain, and the oil feed. Reusing old gaskets is just asking for a leak, and nobody wants to do this job twice.
When you're tightening the mounting nuts to the manifold, do it in a cross pattern and check your torque specs. You want a solid seal so you don't end up with an exhaust leak that sounds like a chirping cricket every time you hit the gas.
Once the turbo is bolted down and the lines are reattached, double-check your coolant level. Since you opened the cooling system, you'll likely need to top it off and "burp" the air out of the system once the truck is running.
The First Start and Break-In
When you're finally ready to turn the key, don't just rev it up immediately. Let the truck idle for a good five to ten minutes. This allows the oil to circulate fully and lets everything reach operating temperature slowly. While it's idling, grab a flashlight and look for leaks. Check the oil lines and the coolant connections specifically.
If everything looks dry, take it for a gentle test drive. Listen for any weird whistling (which could mean an intake or exhaust leak) and keep an eye on your boost levels. It might take a few miles for the computer to fully "learn" the new actuator if you didn't perform a forced calibration with a scan tool, but usually, the 2014 models are pretty good about figuring it out on their own.
Wrapping Things Up
Doing a 2014 6.7 cummins turbo replacement is a big job, but it's definitely doable for a DIYer with some patience and the right tools. It's one of those repairs that really transforms how the truck feels. You'll get that crisp throttle response back, your exhaust brake will actually work, and you won't have to worry about the truck limping home in a cloud of smoke.
Just remember to take your time, don't force the rusty bolts, and keep everything clean. These engines will run forever if you treat them right, and a fresh turbo is like giving your Cummins a second lease on life. Plus, you'll save a ton of money on labor by doing it yourself, which is more than enough for a few tanks of diesel and maybe some more upgrades down the road.