If you're looking into a pusher grid heater delete, you're likely trying to avoid a catastrophic engine failure that's been haunting Cummins owners for years. It isn't just about getting a few extra horsepower or making the engine bay look a bit cleaner; for most of us, it's about fixing a ticking time bomb. If you own a 6.7L Cummins, you've probably heard the horror stories of the "jiggle pin" or that pesky nut backing off and dropping straight into the intake. It's the kind of thing that keeps you up at night because one tiny piece of hardware can easily turn your expensive truck into a very heavy paperweight.
The Real Reason People Are Deleting Their Grid Heaters
Let's get straight to the point: the factory grid heater design is a bit of a disaster waiting to happen. The way Dodge and Cummins set it up, there's a bolt that holds the electrical heating element in place. Over time, because of heat cycles and vibration, that bolt can wiggle loose. When it finally lets go, it doesn't just fall into the bottom of the air box—it gets sucked directly into the number six cylinder.
I've seen photos of what happens next, and it isn't pretty. We're talking about ruined pistons, scarred cylinder walls, and a repair bill that'll make your eyes water. By choosing a pusher grid heater delete, you're basically taking that risk and throwing it in the trash. You're replacing that restrictive, dangerous factory block with a solid piece of machined hardware that has zero moving parts to fail. It's the ultimate "peace of mind" mod for anyone who plans on keeping their truck for the long haul.
How the Pusher Grid Heater Delete Changes the Game
Aside from not blowing up your engine, there's a huge performance side to this. If you look at the stock grid heater, it's basically a big toaster element sitting right in the middle of your airflow. It's restrictive, it creates a ton of turbulence, and it's just not efficient. When you swap it out for the Pusher version, you're opening up that bottleneck significantly.
Pusher designs their stuff to be high-flow. They don't just make a block that fits; they make sure the internal geometry actually helps the air get where it needs to go. You'll notice a difference in throttle response almost immediately. The turbo seems to spool up just a hair faster because it's not fighting to shove air through a metal honeycomb. It's one of those rare mods where you get a reliability boost and a performance bump at the same time. Plus, if you're already running an aftermarket intake horn, the pusher grid heater delete is the logical next step to complete that air path.
What About Those Cold Mornings?
This is the big question everyone asks: "If I delete my heater, will my truck start when it's freezing outside?" The honest answer is it depends. If you live in Florida or Texas, you'll literally never notice a difference. Your truck will fire up just as quickly as it did before. These modern common-rail diesels are incredibly efficient at starting compared to the old 12-valves.
However, if you're up in the mountains or living through a Montana winter, you might have to change your routine a bit. You'll likely want to rely more on your block heater. Plugging the truck in for a few hours before you head out will make up for the lack of a grid heater. Some guys also notice a bit more "white smoke" on cold starts for the first thirty seconds, but it clears up once the cylinders get some heat in them. It's a trade-off, sure, but most people would rather deal with a slightly grumpy cold start than a disintegrated engine.
Installation Isn't as Scary as You Think
If you're decent with a wrench, you can totally handle installing a pusher grid heater delete in your driveway. It's not like pulling a transmission or doing a head gasket. You're mostly working on the top of the engine, which is nice for your back and your sanity.
You'll need to pull the intake horn off first, which is pretty straightforward. The trickiest part is usually dealing with the fuel lines. You don't necessarily have to remove them completely, but you'll definitely need to loosen them to get enough clearance to slide the old heater out and the new delete block in. Just make sure you have some fresh gaskets on hand—don't try to reuse the old ones, it's just not worth the risk of a boost leak later.
Once you get the factory heater out, you'll also have to deal with the heavy-gauge power wire that used to feed it. Most people just wrap it up securely or disconnect it from the solenoid. The Pusher kit usually comes with everything you need to keep things clean and professional. It's a Saturday morning project that makes a massive difference in how your truck breathes.
Performance Gains: More Than Just Peace of Mind
Let's talk about EGTs (Exhaust Gas Temperatures) for a second. When you improve the airflow on the intake side with a pusher grid heater delete, you're helping the engine run more efficiently. More air usually means cooler combustion temperatures, especially when you're towing a heavy load up a grade. I've talked to plenty of guys who saw a 50-degree drop in EGTs just by cleaning up the intake path.
It's also about future-proofing. If you plan on doing bigger injectors, a larger turbo, or a custom tune down the road, you need that airflow. There's no point in spending thousands on a high-end turbo if the air is just going to get choked out by a factory grid heater. By installing the delete now, you're setting a solid foundation for any power goals you might have later. It's a supporting mod that actually supports the health of the entire system.
Why Choose Pusher Over Other Options?
There are a lot of "no-name" delete plates out there on the internet, but there's a reason people specifically look for the pusher grid heater delete. The build quality is just on another level. When you hold a Pusher part in your hand, you can tell it was machined by people who actually give a damn. The surfaces are flat, the bolt holes line up perfectly, and the finish is top-tier.
I've seen some of the cheaper plates arrive warped or with burrs still inside the air passage. You do not want metal burrs floating around in your intake—that kind of defeats the whole purpose of removing the heater to save the engine! Pusher has a reputation in the Cummins community for a reason. They specialize in these trucks, and they know exactly where the weak points are. When you buy their kit, you know it's going to fit the first time without you having to "clearance" anything with a file or a hammer.
Final Thoughts on the Swap
At the end of the day, the pusher grid heater delete is one of those modifications that just makes sense. You're removing a known failure point, increasing your airflow, and potentially lowering your EGTs. Yes, you have to be a bit more mindful if you live in a place where the air hurts your face in the winter, but that's a small price to pay for the security of knowing your engine isn't going to swallow a bolt.
If you're on the fence, just go pull your intake horn and take a look at your current grid heater. If you see even a little bit of wiggle in that center stud, or if there's a ton of soot buildup clogging those fins, you'll know it's time to make the switch. It's an easy, effective way to make your Cummins more reliable, and your truck will definitely thank you for it with better throttle response and a much longer lifespan. Don't wait until you hear a "clunk" in the intake to start thinking about it!