Fix RAM 6.7L Grid Heater Failure with Banks Monster-Ram
Preventing RAM 6.7L Grid Heater Failure with the Monster-Ram
Understanding the RAM grid heater problem
A failing RAM grid heater causes catastrophic engine damage if you ignore the warning signs. Read on to learn how the Banks Monster-Ram prevents this disaster. Over time, the bolt inside the 2007-2024 RAM 6.7L Cummins stock grid heater deteriorates. Eventually, it breaks loose and falls directly into the intake runner. Gravity then pulls the heavy steel stud straight into cylinder #6.
Consequently, this failure destroys pistons, valves, and cylinder heads, often ruining the entire engine. Although this critical design flaw has existed for years, many mechanics miss the symptoms. Furthermore, they rarely disassemble the engine to diagnose the root cause. Instead, they just replace the whole motor, meaning the factory flaw remains. Specifically, this malfunction affects all year ranges of the 6.7L Cummins, regardless of mileage, geographic region, or climate.
How to identify the problem
A sudden check engine light usually serves as your first warning. When you plug in an OBD scan tool, you will frequently see P2609 or P0542 diagnostic trouble codes.
Decoding P2609 and P0542 Trouble Codes
Specifically, a P2609 code signals a severe intake air heater voltage drop. This directly means the grid heater bolt is failing and actively losing its electrical connection.
Similarly, a P0542 code triggers when the powertrain control module (PCM) detects abnormal voltage from the intake circuit. Corroded harness connectors, an open circuit, or high resistance in the heater relay typically cause this fault. However, the computer might take three full drive cycles before illuminating the check engine light. Therefore, you must treat both P2609 and P0542 codes as immediate red flags.
Inspecting the Factory Grid Heater
Look at the bottom of the factory grid heater, and you will find a bolt and nut assembly. The top of this stud connects to the +12v lead, which energizes the entire heating element. Electrical current passes straight through this stud into the metal strip that feeds the grid.
Because of extreme heat cycles, this stud and nut assembly eventually melts. Once it breaks free, it drops directly into the intake runner and smashes into cylinder #6.
Below, you can see the empty hole where the bolt used to sit. Unfortunately, this specific RAM owner ran out of luck. The loose stud bounced around inside cylinder #6, causing catastrophic piston, valve, and head damage.
To get a clear view of the damage, look at the two upside-down grid heaters below. Compare the brand-new heater on top to the destroyed unit underneath.
The Jiggle Test
You can actually detect a failing heater by simply jiggling the +12v lead on top of the assembly. If the plastic housing rocks back and forth, the bolt has likely sheared off. Consequently, it is probably rolling around inside your intake manifold right now.
Fortunately, some RAM owners use this jiggle test to catch the failure early. If you feel significant movement in that plastic post, do not start the engine. Instead, tow the truck straight to a mechanic for a proper inspection, just like Randy did in the video above. You can locate this +12V post right next to the fuel rail, as shown below.
Ultimately, a broken grid heater bolt guarantees total engine failure. The image below shows a destroyed piston after it ingested the stud. The piston repeatedly hammered the bolt into the cylinder head and valves until the motor locked up entirely.
Because the gouges cut below the minimum deck height, machinists could not resurface the head. As a result, the owner had to buy a new piston, head, and valves. Factoring in labor, the final repair bill easily exceeded $10,000. Even worse, dozens of other RAM owners had to buy complete replacement engines costing upwards of $30,000.
RAM dealers can’t help, here’s why
Dodge RAM service centers only install certified factory replacement parts. Sadly, these are the exact same failure-prone parts that caused the issue in the first place. Furthermore, dealerships typically charge nearly $3,000 for this temporary fix.
The solution is Banks Monster-Ram Intake Elbow
We specifically engineered the Banks Monster-Ram intake elbow to maximize air mass flow. Not only does this system completely outperform the stock unit, but it also destroys every aftermarket competitor. By delivering a massive 88.3% gain in mass flow, the Monster-Ram provides instant throttle response and noticeably better fuel economy.
Previously, competing intake elbows required deep dents or crushed tubes just to clear the stock fuel line. To fix this restriction, Banks engineers designed a proprietary #1 fuel line. This custom line securely hops over the Monster-Ram, guaranteeing perfectly unobstructed airflow. Next, we dramatically increased density by throwing out the restrictive factory grid heater and installing a billet high-flow intake plate. To handle cold weather, we integrated a high-performance coil heater vertically inside the aluminum casting.
Interestingly, our engineering team initially focused purely on horsepower gains. However, mechanics at ProTech Diesel Centre soon called to praise the system for permanently solving the deadly grid heater bolt issue. By replacing the entire factory grid assembly, the Monster-Ram completely eliminates the risk of engine failure.
Take one look inside the casting, and you will instantly see how free-flowing the Monster-Ram is compared to the choked-out factory elbow.
As usual, Banks delivered an outstanding product. The catastrophic grid heater GONE. Now I can rest easy. Definitely feel a difference in throttle response, feels like it has more power and turbo lag GONE.
⭐⭐⭐⭐⭐ – Brandon O., Sonora, CA
Stop RAM Grid Heater Failure With the Right Upgrade
The Monster-Ram is the go-to for RAM owners aiming to improve performance, fuel economy, and prevent grid heater failure. And best of all, it’s 50-state emissions compliant. Upgrading to the Monster-Ram is the most effective way to eliminate the risk of RAM grid heater failure permanently.