If you're tired of worrying about that infamous bolt falling into your engine, getting a 6.7 cummins grid heater relocation kit is probably the smartest move you can make for your Ram. It's one of those things where you either spend a little bit of money and time now, or you potentially spend fifteen thousand dollars on a new long block later. If you've spent any time on the diesel forums or in Facebook groups, you've definitely seen the horror stories. Someone's driving down the highway, they hear a weird pop, and suddenly their engine is "making oil" or just flat-out seized.
The culprit is almost always that factory grid heater bolt. It's a design flaw that's haunted 6.7 Cummins owners since 2007.5. Basically, the heat cycles and vibration cause the nut holding the heater element to loosen or even arc and melt. Once it lets go, gravity does the rest, and that tiny piece of metal drops straight into cylinder number six. It's a bad day for everyone involved.
Why the Factory Setup is a Ticking Time Bomb
Let's talk about why this happens in the first place. The factory grid heater is located right at the intake plenum. It's basically a giant toaster element designed to warm up the incoming air so your truck starts easily when it's freezing outside. The problem is how that element is powered. There's a stud and a nut that carry the electrical current, and over hundreds of heat cycles, the connection can degrade.
When that connection gets a little loose, it starts arcing. That arc creates an insane amount of heat—way more than the heater is supposed to make—and it literally melts the stud. Since the intake is under vacuum when the engine is running, that melted nut gets sucked right into the intake valve. Most people don't even know there's an issue until their truck starts missing or they see the "lightning bolt" dash light, and by then, the damage is done.
The Choice Between a Delete and a Relocation
A lot of guys just go for a "grid heater delete." It's cheap, and it definitely fixes the problem because you're just taking the heater out entirely. But here's the catch: if you live somewhere where the temperature drops below freezing, your truck is going to hate you in the morning. These common rail engines are pretty good at starting, but they aren't magic. Without that heat, you're going to get a lot of white smoke, long crank times, and potentially a lot of wear and tear on your batteries and starter.
This is exactly why the 6.7 cummins grid heater relocation kit has become so popular. It gives you the best of both worlds. You get to remove the dangerous factory heater from the intake plenum, but you keep a heating element in the system. Usually, these kits move the heater to a spot in the intercooler piping or use a different style of heater that doesn't have the "killer bolt" design.
Keeping Your Cold Starts Reliable
If you've ever tried to start a diesel at 10 degrees Fahrenheit without a heater, you know it sounds like a bag of hammers being tossed into a dryer. It's brutal. By using a relocation kit, you're still warming that air before it hits the cylinders, which makes for a much smoother start. You won't have to worry about the truck failing to fire up when you're trying to get to work on a snowy Tuesday. Plus, it saves your glow plugs (wait, Cummins doesn't have those) and your electrical system from the strain of repeated failed starts.
Improving Airflow While You're At It
One of the side benefits people don't always talk about is the airflow. The factory grid heater is basically a big restriction right in the mouth of the intake. It's like trying to breathe through a straw with a piece of lint stuck in it. When you install a 6.7 cummins grid heater relocation kit, you're typically replacing that factory plate with a high-flow billet plate.
This opens up the intake path significantly. You'll often notice a slight drop in exhaust gas temperatures (EGTs) and maybe even a little better throttle response. It's not going to turn your truck into a race car overnight, but every bit of airflow helps, especially if you're running a tuner or an upgraded turbo. It just makes the whole engine breathe more naturally.
What's Actually in the Kit?
Most relocation kits are pretty comprehensive because companies know you don't want to be running to the hardware store in the middle of a project. Usually, you're looking at a new intake plenum plate (the "wiggle-free" version), a new heating element, some heavy-duty wiring, and all the gaskets you'll need.
Some of the higher-end kits actually integrate with your factory computer so you don't get any "check engine" lights or "wait to start" issues. They use a different style of heater—often a solenoid-driven one or a heavy-duty glow-plug style heater—that sits further upstream. This way, even if the heater were to fail (which is rare with these designs), it's physically impossible for any parts to fall into the engine.
The Installation Process
I won't lie to you—this isn't a five-minute job, but it's definitely something you can do in your driveway on a Saturday afternoon if you're handy with a wrench. You'll need to pull the intake horn off, which means messing with some fuel lines (be careful with the high-pressure side!) and disconnecting some electrical connectors.
The biggest pain is usually cleaning off the old gasket material. You want that surface to be perfectly clean so you don't end up with a boost leak later. Once the old plate is off, you'll see the factory heater. If you're curious, do the "wiggle test." Take a pair of pliers and see if that center nut moves at all. If it does, you were a lot closer to an engine failure than you realized.
Putting the new 6.7 cummins grid heater relocation kit in is pretty straightforward from there. You bolt down the new high-flow plate, route your new wiring, and mount the relocated heater in the intake tract as per the instructions. Most guys take this opportunity to upgrade their intake horn as well, since everything is already taken apart.
Is It Worth the Money?
Look, I get it. Spending several hundred dollars on a part that doesn't necessarily add 100 horsepower feels a bit boring. It's not as "cool" as a new exhaust or a shiny turbo. But think of it as an insurance policy.
If that bolt drops, you're looking at a minimum of $10,000 to $15,000 for a rebuild or a crate engine. Compared to that, a 6.7 cummins grid heater relocation kit is a total bargain. It's about peace of mind. Every time you turn the key, you don't want to have that nagging thought in the back of your head wondering if today is the day your engine decides to eat itself.
Also, if you ever plan on selling the truck, having this done is a huge selling point. Any informed buyer looking at a 4th or 5th gen Ram is going to ask, "Has the grid heater been addressed?" If you can show them the relocation kit, it proves you took care of the truck and handled the most critical "preventative maintenance" item on the list.
Final Thoughts
The Cummins 6.7 is a legendary engine. It's got more torque than most people know what to do with, and it'll pull a house off its foundation if you ask it to. But every legend has a weakness, and for this engine, it's that silly little nut on the heater.
By installing a 6.7 cummins grid heater relocation kit, you're fixing the only real "kill switch" the engine has while keeping the convenience of a truck that starts in the dead of winter. It's a win-win. You get better airflow, you keep your cold-start capability, and most importantly, you stop worrying. If you haven't checked your grid heater bolt lately, do yourself a favor and just get the kit. Your wallet (and your engine) will thank you down the road.