Author: John Lee, SPELAB Mechanical Engineer. Updated on May 12, 2026.
Quick Answer: Should You Delete the Grid Heater on a 6.7 Cummins?
A 6.7 Cummins grid heater delete or upgrade is usually considered when owners want to reduce the risk of grid heater bolt failure, improve airflow through the intake horn area, or remove a known weak point in the factory intake system. However, the grid heater helps with cold starts, so the right choice depends on climate, truck use, and whether you want to fully delete the heater or use a heater-retaining upgrade.
If your truck runs mostly in warm climates, sees performance use, or you are mainly concerned about failure prevention, a 6.7 Cummins Grid Heater Delete Kit may make sense. If your truck starts in freezing weather, especially below -10°C / 14°F, consider a heater-retaining upgrade, block heater, coolant heater, or other cold-start support before removing the factory heater function.
What Is the Grid Heater on a 6.7 Cummins?
The grid heater sits in the intake path and helps warm incoming air during cold starts. On a diesel engine, warmer intake air can make starting easier in low temperatures and help reduce rough cold-start behavior.
The problem is that the factory grid heater assembly can become a concern over time. Some owners worry about grid heater bolt failure, intake restriction, carbon buildup, and the risk of loose hardware entering the intake path. That is why many 6.7 Cummins owners research whether to delete, replace, or upgrade the grid heater.
For broader intake upgrades, compare related intake system parts before deciding whether the grid heater plate, intake horn, or full intake path should be upgraded together.
Why Do 6.7 Cummins Owners Delete or Upgrade the Grid Heater?
Most owners do not delete the grid heater just for looks. They usually do it because they want to address one or more practical problems in the factory intake setup.
| Reason | Why It Matters | What to Consider |
|---|---|---|
| Grid heater bolt failure risk | A loose or broken bolt can become dangerous if it enters the intake path | Inspect the factory assembly before a failure occurs |
| Intake restriction | The factory grid heater area can create airflow restriction | Compare delete plates or heater-retaining upgrades |
| Carbon buildup | Soot and oil vapor can create deposits around the intake path | Clean the intake area during installation |
| Cold-start performance | The grid heater helps in freezing weather | Cold-climate owners should plan additional starting support |
| Engine bay simplification | Fewer parts can make the intake area easier to service | Do not leave wiring, sensors, or connectors unsecured |
To understand the failure concern in more detail, read more about the grid heater bolt failure risk before you start the install.
Grid Heater Delete vs Grid Heater Upgrade
Not every truck needs the same solution. A full delete may be suitable for some builds, while a heater-retaining upgrade may be better for daily drivers or trucks used in cold climates.
| Option | Best For | Things to Consider |
|---|---|---|
| Full grid heater delete | Warm climates, performance builds, owners focused on removing the factory failure point | Cold starts may become harder in freezing weather |
| Heater-retaining upgrade | Cold climates, daily drivers, tow rigs, work trucks | Better balance between reliability, airflow, and cold-start support |
| Stock replacement | Owners who want a factory-style repair | May not eliminate the original bolt or restriction concern |
If you are still comparing options, this guide on whether to delete or upgrade the grid heater can help you choose the safer path for your truck.
Cold Weather Warning Before Deleting the Grid Heater
The grid heater exists for a reason: it helps warm incoming air during cold starts. If your truck regularly starts in freezing temperatures, especially below -10°C / 14°F, deleting the heater may make cold starts harder.
Cold-climate owners should consider one or more of the following before deleting the factory heater function:
- Block heater or coolant heater
- Battery maintenance or upgraded batteries
- Fuel system cold-weather support
- Heater-retaining intake upgrade
- Proper winter fuel and anti-gel treatment where appropriate
If your Ram 2500 or 3500 is a daily driver in northern states or Canada, do not choose a full delete only because it looks cleaner. Choose the setup that matches how the truck actually starts and works in winter.
Pro Tip: Monitor EGT After Any Intake Modification
After deleting or upgrading the grid heater, monitor exhaust gas temperature if your truck is tuned, tows heavy, or works under long uphill load. A smoother intake path can help reduce restriction, but EGT still depends on tuning, fueling, turbo efficiency, load, and driving style. If EGT climbs higher than normal after the install, inspect for boost leaks, sensor issues, or fueling problems instead of blaming the grid heater plate alone.
SPELAB 6.7 Cummins Grid Heater Delete Kit Overview
The SPELAB kit is designed to replace the factory grid heater area with a cleaner intake-path solution for 2007.5–2024 Ram 2500 and 3500 6.7L Cummins applications. Depending on the kit configuration, it may support airflow improvement, reduce factory failure points, and simplify the intake layout.
- Color options: Available in black, silver, and red.
- Reduced restriction: Helps smooth the intake path compared with the factory grid heater area.
- Durable construction: Built for high-heat diesel engine bay conditions.
- Cleaner intake layout: Simplifies the intake horn area and improves service access.
- Application range: Designed for 2007.5–2024 Ram 2500/3500 6.7L Cummins diesel trucks.
Important note: The grid heater is not the same as DPF, EGR, or DEF equipment, but local inspection rules can vary. Confirm your local requirements before modifying factory intake-heater components.
For owners upgrading the intake path at the same time, a 6.7 Cummins intake horn can be paired with the grid heater solution depending on your model year and build plan.
Before You Start: Tools and Preparation
This job requires care because the intake port will be open and some trucks may require work near fuel lines, electrical connectors, and sensors. If you are not comfortable working around diesel fuel system components, professional installation is recommended.
Required Tools
- 10mm, 13mm, and 15mm sockets
- Ratchet and extensions
- Universal joint adapter for tight intake-area access
- Torque wrench
- Flathead screwdriver or trim tool
- Pick tool for connectors and clips
- Clean rags or protective covers
- Penetrating lubricant for stuck bolts
- Phone or camera to document connector and line locations
- Scan tool for post-install code check
Pre-Installation Checklist
- Park the truck on level ground.
- Let the engine cool completely.
- Disconnect the negative battery terminals.
- Clean dirt and debris around the intake area before disassembly.
- Take photos of connectors, line routing, and brackets before removal.
- Cover the intake port immediately when open.
- Confirm that the kit, gasket, hardware, and instructions match your truck year.
Step-by-Step 6.7 Cummins Grid Heater Delete Installation
The exact procedure can vary by model year and kit configuration. Use the steps below as a general guide, and always follow the product instructions included with your kit.
Step 1: Remove Intake Tube and Intake Horn Components
- Loosen the intake tube clamps and remove the intake tube.
- Remove the intake horn bracket or related hardware as required.
- Disconnect sensors or electrical connectors only after documenting their locations.
- Cover the open intake port with a clean rag or protective cover to prevent debris from entering the engine.
For owners combining this job with a horn upgrade, review the step-by-step intake horn installation before removing parts.
Step 2: Remove Fuel Rail or Injector Line Components If Required
Some installations may require additional clearance around fuel lines or related components. Work slowly and keep the area clean.
- Take photos before disconnecting lines or brackets.
- Use the correct wrench to avoid rounding fittings.
- Keep clean rags nearby for small fuel drips.
- Do not allow dirt to enter open fuel or intake areas.
- If you are not comfortable with fuel system work, stop and use a qualified diesel technician.
Step 3: Remove the Stock Grid Heater Assembly
- Locate the factory grid heater assembly in the intake path.
- Remove the mounting bolts with the correct socket.
- Lift the assembly out carefully without dropping hardware.
- Inspect the factory grid heater, bolts, gasket surfaces, and intake port.
- Clean the mating surface and remove loose carbon or debris.
Debris warning: Do not use excessive force or uncontrolled compressed air toward an open intake port. Any bolt, washer, carbon chunk, rag fiber, or tool fragment that falls into the intake can create serious engine damage.
Step 4: Install the SPELAB Grid Heater Delete Plate
- Compare the new part with the removed factory assembly.
- Install the new gasket or seal as instructed.
- Set the delete plate or upgrade plate into position.
- Start bolts by hand to avoid cross-threading.
- Tighten bolts evenly in stages instead of fully tightening one side first.
- Confirm the plate sits flat and the gasket is not pinched or misaligned.
Torque note: Many 6.7 Cummins intake horn or grid heater plate installations use a torque spec around 18 lb-ft, or about 24 Nm, for intake-related bolts. Always follow the torque specs included with your specific kit. Do not guess, because over-tightening can strip threads or distort the aluminum sealing surface.
Step 5: Reinstall Intake Components
- Reinstall the intake horn, intake tube, brackets, and clamps.
- Reconnect electrical connectors and sensors.
- Verify that wiring is not stretched, pinched, or left unsecured.
- Reconnect the batteries.
- Check the engine bay for tools, loose bolts, or rags before starting the engine.
Common Installation Challenges and Solutions
| Challenge | Why It Happens | Solution |
|---|---|---|
| Seized or rusted bolts | Heat cycles, corrosion, and age can lock hardware in place | Apply penetrating lubricant, use steady pressure, and avoid snapping bolts |
| Limited space near the intake area | The rear intake area can be tight on Ram 2500/3500 trucks | Use extensions, a universal joint adapter, and good lighting |
| Difficult fuel line or bracket removal | Line routing and brackets vary by model year | Take photos before removal and keep fittings clean |
| Misaligned gasket | The plate may shift during installation | Start bolts by hand and tighten evenly in stages |
| Unexpected fault code after install | Loose connector, heater circuit issue, or existing electrical problem | Scan for codes, inspect connectors, and verify kit wiring instructions |
Common Installation Mistakes to Avoid
| Mistake | Why It Matters | How to Avoid It |
|---|---|---|
| Leaving the intake port uncovered | Debris can fall into the engine | Cover the port immediately after opening the intake |
| Reusing damaged gaskets | Can cause intake leaks | Use the supplied gasket or a new seal |
| Over-tightening bolts | Can strip threads or distort sealing surfaces | Use a torque wrench and follow instructions |
| Loose electrical connectors | Can trigger codes or cause starting issues | Confirm every connector is fully seated |
| Ignoring cold-start needs | Can make winter starts harder | Plan cold-weather support before deleting heater function |
| Fuel line contamination | Dirt can damage fuel system components | Keep lines clean and capped if removed |
Post-Installation Checklist
After installation, do not immediately assume the job is complete. A few checks can prevent leaks, codes, and cold-start problems.
- Confirm no tools, bolts, rags, or debris are left near the intake port.
- Reconnect all electrical connectors and battery terminals.
- Cycle the key and check for abnormal warning lights.
- Start the engine and listen for intake leaks or hissing.
- Check for fuel leaks if any fuel lines were removed.
- Inspect gasket areas after the first heat cycle.
- Scan for codes after the first drive.
- Recheck clamps, brackets, and harness routing.
If the truck shows a check engine light, rough idle, hard start, or unusual intake noise after installation, do not keep driving without inspection. Recheck connectors, gasket position, heater circuit requirements, sensor plugs, and intake sealing.
Common Codes After Grid Heater Delete or Upgrade
After a grid heater delete or upgrade, scan the truck even if it seems to run normally. Codes related to the intake air heater system may appear if wiring is loose, the heater circuit is not connected as expected, or the truck already had an electrical issue before installation.
| Code | Common Meaning | What to Check |
|---|---|---|
| P2609 | Intake air heater system performance or voltage concern | Grid heater circuit, relay, wiring, connectors, and kit compatibility |
| P0542 | Intake air heater circuit high / grid heater-related concern | Heater circuit, relay, power feed, and electrical connections |
| Hard cold start with no code | Reduced intake air heating support in cold weather | Battery condition, block heater, coolant heater, winter fuel, and heater-retaining options |
Important: Do not assume every P2609 or P0542 code means the new part is bad. Start with wiring, connectors, relay condition, battery voltage, and model-year compatibility before replacing parts.
Maintenance After a Grid Heater Delete or Upgrade
After deleting or upgrading the grid heater, continue inspecting the intake system as part of normal maintenance. A cleaner intake path still needs regular checks, especially on trucks that tow, idle often, or operate in dusty environments.
- Inspect the intake system every 10,000 miles for carbon buildup or loose hardware.
- Verify electrical connectors and wiring during oil changes.
- Check gasket seals annually or after heavy towing seasons.
- Watch cold-start behavior as temperatures drop.
- Scan for codes if the truck starts differently after the install.
If you are already servicing the intake side, it is also worth inspecting oil vapor and crankcase ventilation condition. On high-mileage or modified trucks, a 6.7 Cummins CCV reroute kit may be worth comparing if oily intake residue is a recurring issue.
Related Guides
- Should 6.7 Cummins owners upgrade or delete the grid heater?
- How to prevent the 6.7 Cummins grid heater bolt failure accident
- SPELAB 6.7 Cummins intake horn installation guide
FAQ
Q: Will a 6.7 Cummins start without the grid heater?
A: Yes, many trucks can start without the grid heater in mild climates, but cold starts may become harder in freezing temperatures. Cold-climate owners should consider a heater-retaining upgrade or additional cold-start support.
Q: Does a grid heater delete require tuning?
A: Many grid heater delete or upgrade plates are designed as bolt-on parts, but requirements can vary by model year and wiring setup. Always follow the kit instructions and verify whether the heater circuit must remain connected.
Q: Will deleting the grid heater trigger a check engine light?
A: A properly designed kit is intended to work without tuning on supported applications, but fault codes can still occur if wiring is unplugged, connectors are loose, sensors are damaged, or the truck has existing electrical issues. Always verify compatibility by model year before installation.
Q: What codes can appear after a 6.7 Cummins grid heater delete?
A: Codes such as P2609 or P0542 can appear if the intake air heater circuit, relay, connector, wiring, or heater function is not detected as expected. A properly installed kit is intended to work on supported applications, but you should still scan the truck after installation and confirm all electrical connections.
Q: What torque should I use for the grid heater delete plate?
A: Many 6.7 Cummins intake horn or grid heater plate installs use around 18 lb-ft, or about 24 Nm, for intake-related bolts. Always follow the instructions for your exact kit and tighten evenly to avoid gasket leaks or stripped threads.
Q: Can a grid heater bolt really damage a 6.7 Cummins engine?
A: A loose or broken grid heater bolt can be dangerous if it enters the intake path. That is why many owners replace, upgrade, or delete the stock grid heater assembly before a failure occurs.
Q: Does deleting the grid heater affect engine lifespan?
A: A properly installed grid heater delete can remove a known failure point and may reduce intake restriction, but engine lifespan still depends on maintenance, cold-start strategy, tuning, fuel quality, oil condition, and how the truck is used.
Q: Is a grid heater delete good for cold climates?
A: It depends. In mild climates, many owners have fewer cold-start concerns. In freezing climates, the grid heater is useful, so a heater-retaining upgrade or additional cold-start support may be a better choice.
Q: Should I monitor EGT after deleting the grid heater?
A: Yes, especially if the truck is tuned, tows heavy, or works under long-load conditions. EGT depends on airflow, fueling, turbo efficiency, boost leaks, and tuning, so use EGT as a health indicator after any intake-side modification.
Q: Which trucks fit the SPELAB 6.7 Cummins grid heater delete kit?
A: The kit is designed for 2007.5–2024 Ram 2500 and 3500 trucks with the 6.7L Cummins diesel engine. Always confirm model year, engine, and kit configuration before ordering.
Q: Can I install a 6.7 Cummins grid heater delete myself?
A: Yes, if you have intermediate mechanical skills and are comfortable working around intake components, fuel lines, connectors, and gaskets. If you are not comfortable keeping debris out of the intake or working near fuel system components, professional installation is safer.
Q: What is the biggest installation risk?
A: The biggest risk is dropping debris, bolts, or tools into the open intake port. Always cover the intake opening and keep the work area clean during removal and installation.
Q: Should I upgrade the intake horn at the same time?
A: It can make sense if you are already working in the intake area. A 6.7 Cummins intake horn upgrade can help smooth airflow and reduce restriction when paired with the right grid heater delete or upgrade setup.
John Lee
Mechanical Engineer | 10+ Years Experience
John has spent the last decade engineering and testing high-performance automotive components. Specializing in drivetrain durability and thermal management across Powerstroke, Cummins, and Duramax applications, he bridges the gap between OEM limitations and aftermarket performance. His philosophy: "Factory parts are just a starting point."
