6.7 Cummins CCV Filter Replacement: Guide & Reset Procedure
Replacing the 6.7 Cummins CCV filter every 67,500 miles is essential to prevent excessive crankcase pressure and oil leaks. This maintenance task requires basic tools like an 8mm socket and includes a critical electronic reset of the service reminder on your dashboard.
🎯 Key Takeaways
- Replace the CCV filter every 67,500 miles to maintain engine health.
- Use an 8mm socket to remove the CCV cover bolts.
- A clogged filter causes oil leaks and high crankcase pressure.
- Always reset the ‘Service CCV Filter’ message via the foot pedal sequence.
- Inspect the valve cover area for oil residue during replacement.
To replace the Crankcase Ventilation (CCV) filter on your 6.7L Cummins, you need to access the top of the valve cover, remove the breather element housing, and swap the internal filter. This maintenance is required every 67,500 miles on most Ram 2500 and 3500 trucks. Neglecting this service will trigger a persistent “Perform Service” message on your dashboard and eventually lead to increased crankcase pressure that can damage your engine seals.
Performing this job yourself takes roughly 30 to 45 minutes and requires only basic hand tools. By staying on top of this interval, you prevent oil mist from coating your turbocharger compressor wheel and fouling your intercooler boots. It is one of the most cost-effective ways to ensure your 6.7L Cummins breathes cleanly and maintains optimal turbo performance over hundreds of thousands of miles.
Signs and Symptoms of a Clogged CCV Filter
The “Perform Service” Dashboard Indicator
The most common sign that your CCV filter has reached its capacity is the overhead display or instrument cluster showing a Perform Service message. On the 6.7L Cummins platform, this specific message is almost exclusively tied to the CCV filter and the EGR cleaning interval. Unlike a standard oil change reminder, this notification is hard-coded to the 67,500-mile mark. If you see this message and your oil is fresh, your crankcase filter is the primary suspect.
Diagnostic Trouble Codes (DTCs)
If the filter becomes severely restricted, the engine’s sensors will detect excessive internal pressure. You may encounter Code P1507, which specifically indicates Crankcase Filter Restriction. When this code triggers, the ECM has determined that the pressure inside the valve cover is high enough to potentially blow out the rear main seal or the oil pan gasket. At this stage, the filter is likely saturated with oil and soot, losing its ability to separate air from liquid oil.
Visible Oil Leaks and Turbo Contamination
A failing CCV filter often leaves physical clues under the hood. You should inspect the following areas:
- Turbocharger Inlet: Excess oil passing through a clogged filter will pool at the turbo inlet, causing a “wet” look on the compressor wheel.
- Intercooler Boots: If you notice oily residue or “sweating” around the rubber boots of your charge air cooler pipes, the CCV is likely bypassing oil into the intake system.
- Dipstick Pushing Up: In extreme cases, high crankcase pressure can actually push the oil dipstick slightly out of its tube, venting pressure and oil spray across the engine bay.
Master 6.7 Cummins CCV Filter Replacement in 7 Simple Steps
The Crankcase Ventilation (CCV) filter on your 6.7L Cummins engine plays a vital role in maintaining the health of your turbocharger and intake system by capturing oil mist and preventing it from re-entering the combustion cycle. Over time, this filter becomes saturated, leading to a “Perform Service” message on your dashboard or, worse, oil leaks and reduced engine efficiency. This comprehensive guide covers everything from tool selection to resetting your dash light, ensuring your Ram truck stays on the road and out of the shop for this routine maintenance task.
Step 1: Preparation and Tool Gathering
What you need: A new CCV filter (OEM Mopar/Fleetguard part number CV52001 is highly recommended), an 8mm socket, a ratchet with a 3-inch extension, a flathead screwdriver, clean rags, and nitrile gloves.
Instructions: Before you begin, ensure your vehicle is parked on a level surface and the engine is completely cool. The 6.7 Cummins retains significant heat in the top-end components, and you will be working directly over the valve cover. Open the hood and locate the large rectangular plastic housing sitting atop the valve cover; this is the CCV filter assembly. Lay out your tools on a fender mat or clean workspace. Inspect your new filter to ensure the integrated rubber gasket is seated properly and that there are no cracks in the plastic housing. Having everything ready beforehand prevents you from having to step away mid-process with an open engine component exposed to dust.
Pro Tip: Stick with Fleetguard or Mopar filters. Cheap aftermarket CCV filters often have inferior filtration media that can trigger premature “Service” lights or allow oil vapor to bypass the filter, eventually gunking up your turbocharger vanes.
Step 2: Clearing the Way and Removing the Beauty Cover
What you need: 8mm socket and ratchet.
Instructions: Depending on the year of your Ram 2500 or 3500, you may have a plastic “beauty cover” over the engine. If present, use your 8mm socket to remove the bolts holding this shroud in place and lift it off. Once the engine is exposed, you will see a wiring harness and a vacuum line crossing over or near the CCV cover. Carefully unclip any plastic wire looms that obstruct access to the perimeter bolts of the CCV housing. You do not necessarily need to disconnect the electrical connectors, but moving the harness slightly to the side will give you the “straight-on” access needed to prevent stripping the small 8mm bolt heads during the next phase of the project.
Pro Tip: Use a piece of masking tape to label any sensors you choose to disconnect, though most owners find they can simply move the harness enough to work around it without unplugging the main engine sensors.
Step 3: Removing the CCV Housing Bolts
What you need: 8mm socket, ratchet, and extension.
Instructions: There are eight (8) small bolts securing the CCV cover to the valve cover. Using your 8mm socket and extension, begin loosening these bolts in a staggered or “crisscross” pattern to ensure even pressure release. These bolts are not under high torque, so they should break loose easily. Be extremely careful not to drop any bolts into the dark recesses of the engine bay, as they can be difficult to retrieve. Once all eight bolts are fully loosened, they should remain “captive” in the cover’s eyelets on most models, but it is always safer to pull them out and place them in a magnetic parts tray if they feel loose. Double-check that all eight are accounted for before attempting to lift the cover.
Pro Tip: If a bolt feels stuck or crunchy, spray a tiny bit of penetrating oil and work it back and forth. The brass inserts in the plastic valve cover can sometimes spin if you apply too much brute force to a seized bolt.
Step 4: Lifting the Cover and Removing the Old Filter
What you need: Flathead screwdriver (optional) and clean rags.
Instructions: With the bolts removed, gently lift the CCV housing cover straight up. If it feels stuck due to the oil seal, use a flathead screwdriver to very lightly pry at a corner—be careful not to gouge the plastic mating surfaces. Once the cover is off, you will see the rectangular filter element. It may be soaked in oil and quite heavy compared to the new one. Lift the old filter out of the valve cover cavity. There might be some residual oil pooling in the bottom of the tray; use your clean rags to wipe away any standing oil or debris. Ensure that the mounting surface where the new filter’s gasket will sit is clean and dry to guarantee a leak-free seal.
Pro Tip: Have an old grocery bag or a piece of cardboard ready to place the old filter on immediately. These filters are saturated with oil and will drip everywhere the moment they are removed from the engine.
Step 5: Installing the New CCV Filter
What you need: New CCV filter and a small amount of clean engine oil.
Instructions: Take your new filter and apply a very thin film of clean engine oil to the rubber gasket running around the perimeter. This helps the gasket slide into place and create a better seal. Lower the filter into the valve cover cavity. Note that the filter is keyed to fit only one way; ensure the “TOP” markings (if present) are facing up and the filter sits flush within the recess. Press down firmly with your palms across the top of the filter to seat it properly. It should not rock or feel loose. If it does not sit flat, check for any debris or an old piece of gasket material that might have stayed behind from the previous unit.
Pro Tip: Check the “manufactured date” on your new filter box. While these don’t “expire,” you want to ensure the rubber seal is soft and pliable, not stiff from sitting in a dry warehouse for five years.
Step 6: Reinstalling the Cover and Torquing Bolts
What you need: CCV cover, 8mm socket, and ratchet.
Instructions: Place the CCV housing cover back over the new filter. Align the bolt holes and hand-thread all eight bolts to ensure they are not cross-threaded. Once hand-tight, use your ratchet to snug them down. Following a star pattern is essential here to prevent the plastic cover from warping. The torque specification is very low—typically around 71-80 inch-pounds (about 6-7 foot-pounds). If you don’t have an inch-pound torque wrench, tighten them until they are “snug” plus a quarter turn. Over-tightening will crack the plastic housing or strip the threads in the valve cover, leading to an expensive and frustrating repair.
Pro Tip: Use “one finger” on the head of the ratchet when tightening to gauge the torque. If you are pulling with your whole arm, you are likely over-tightening these delicate fasteners.
Step 7: Final Inspection and Indicator Reset
What you need: The vehicle’s ignition key.
Instructions: Re-clip any wiring harnesses or vacuum lines you moved during Step 2. Replace the engine beauty cover if you removed it. Now, you must reset the “Perform Service” message on your dashboard. To do this, turn the ignition to the “ON” position (do not start the engine). Press the accelerator pedal slowly to the floor three times within ten seconds. Turn the ignition off. When you next start the truck, the message should be cleared. Finally, start the engine and let it idle for a minute. Inspect the perimeter of the CCV cover for any signs of oil weeping or air hissing. If everything looks dry and the light is off, you have successfully completed the job.
Pro Tip: If the pedal-pump method doesn’t work on your specific model year, you can also navigate through the “Vehicle Info” menu on your EVIC (Electronic Vehicle Information Center) to the “Oil Life” or “Fuel Filter” screen and hold the “Right Arrow” or “Reset” button, though the pedal method is the universal standard for the CCV/EGR service interval.
✅ Final Checklist
- All 8 housing bolts are present and tightened to approximately 80 inch-pounds.
- The new filter is seated flush with no visible gaps in the gasket seal.
- All disconnected wiring harnesses or plastic clips have been re-secured.
- The “Perform Service” message has been cleared from the instrument cluster.
- The engine bay is clear of any rags, tools, or old filter parts.
Important Notes:
- Safety: Always wear eye protection when working with engine components to prevent oil or debris from entering your eyes.
- Professional Help: If you notice heavy sludge or “milky” oil inside the CCV cavity, this could indicate coolant contamination or excessive blow-by; consult a diesel mechanic immediately.
- Estimated Time: 30 to 45 minutes for beginners; 15 minutes for experienced DIYers.
- Cost Range: $60 – $120 for the filter part, depending on whether you buy OEM or a reputable heavy-duty brand.
Essential Tools and Recommended Replacement Parts
Required Tool Kit for the Job
You do not need a professional-grade shop to complete this task. Most 6.7L Cummins owners can finish the job with a simple 3/8-inch drive ratchet set. You will specifically need an 8mm socket for the filter cover bolts and a 10mm socket to remove the plastic engine “beauty” cover. A short extension (3 or 6 inches) is highly recommended to reach the bolts near the back of the engine bay, close to the firewall, where clearance is tight. You may also need a flathead screwdriver to gently pry the breather hose if it is stuck to the housing.
Choosing the Right CCV Filter
For the 6.7L Cummins, the gold standard is the Fleetguard CV52001. Fleetguard is the OEM manufacturer for Cummins, and using this filter ensures the internal media meets the specific micron rating required to protect your turbo. While there are cheaper “white-box” filters available online, they often use inferior foam that can break down and be sucked into the intake.
- Mopar Part Number: 68002433AC (standard for 2007.5–2024 models).
- Fleetguard Part Number: CV52001.
- Gasket Note: Ensure your new filter comes with the integrated perimeter seal; most high-quality kits include this pre-installed on the filter base.
Step-by-Step Removal of the CCV Filter
Accessing the Filter Housing
First, ensure the engine is cool to the touch to avoid burns from the exhaust manifold or coolant lines. Open the hood and locate the large plastic “Cummins 24V Turbo Diesel” cover on top of the engine. Use your 10mm socket to remove the bolts securing this cover and set it aside. This will reveal the large, rectangular CCV housing sitting directly on top of the valve cover. Before proceeding, wipe down the area around the housing with a rag to prevent dirt or debris from falling into the engine once the cover is opened.
Disconnecting the Breather Tube
On the driver’s side of the CCV housing, you will see a thick rubber hose. This is the breather tube that routes filtered air back into the turbo inlet. You may need to loosen a small spring clamp or hose clamp depending on your specific year model. Carefully pull the hose off the housing nipple. If the hose is brittle or cracked, this is the perfect time to replace it, as a leak here can allow unfiltered air into your turbocharger.
Unbolting the Filter Cover
There are typically eight 8mm bolts securing the CCV cover to the cylinder head. Start from the front of the engine and work your way toward the firewall. The bolts located at the very back can be difficult to see; use your hand to feel for them and use the extension on your ratchet to get a square fit. These bolts are held in by the cover and usually won’t fall out, but be careful not to drop them into the deep recesses of the engine bay. Once all bolts are loose, gently lift the entire housing straight up to expose the internal filter element.
The Importance of Timely Crankcase Ventilation Maintenance
Ignoring your 6.7 Cummins CCV filter isn’t just a matter of missing a service interval; it is a direct threat to your engine’s efficiency. This filter is responsible for capturing oil mist and soot before the air is recirculated into the intake. When it becomes saturated, that oily “gunk” has nowhere to go but into your high-performance components.
Protecting Your Turbocharger and Intake Sensors
One of the most expensive risks of a clogged CCV filter is turbocharger damage. If the filter is restricted, oil vapors begin to coat the turbo compressor wheel. Over time, this buildup can cause the wheel to become unbalanced or lead to significant carbon deposits. Furthermore, your Mass Air Flow (MAF) and Manifold Absolute Pressure (MAP) sensors are highly sensitive to oil contamination. A fouled sensor often leads to poor fuel economy, rough idling, and frustrating “ghost” codes that are difficult to diagnose.
Preventing Blown Seals and Oil Leaks
A saturated filter creates excessive backpressure within the crankcase. Diesel engines naturally produce a certain amount of blow-by, and if that pressure cannot escape through the ventilation system, it will find the path of least resistance. This often results in:
- Leaking Gaskets: Pressure can push oil past the valve cover gasket or the oil pan seal.
- Rear Main Seal Failure: In extreme cases, high crankcase pressure can cause the rear main seal to weep, leading to a very costly repair.
- Dipstick “Popping”: If you notice your oil dipstick is slightly unseated, it is a classic sign that your CCV filter is completely blocked.
Cost Analysis: DIY vs. Professional Shop Service
Maintaining a heavy-duty truck is never cheap, but the CCV filter replacement is one area where you can save a significant amount of money with very little effort. Understanding the price gap helps you decide if it is worth your time to tackle this in your own driveway.
What You’ll Spend at the Dealership
If you take your Ram 2500 or 3500 to a dealership, you are likely looking at a bill ranging from $350 to $550. Dealerships often charge a premium for the Mopar-branded filter, frequently marking it up to $150 or more. When you add in the standard shop labor rate—which is often billed as a full hour even if the job takes twenty minutes—and “shop supplies” fees, the total climbs quickly. While you get the peace of mind of a technician doing the work, the financial “tax” for that convenience is steep.
The Financial Benefits of the DIY Approach
When you choose to handle the replacement yourself, your primary cost is the filter itself. High-quality aftermarket filters from reputable brands like Fleetguard (who often manufactures the OEM parts) typically cost between $70 and $110. Since the job requires only basic hand tools that most owners already possess, your labor cost is effectively zero.
- Total DIY Savings: Approximately $250 – $400 per service interval.
- Time Commitment: Usually 30 minutes or less for an experienced owner.
- Tool Requirements: Minimal (standard socket set and a screwdriver).
Beyond the raw numbers, doing it yourself allows you to inspect the area for other potential issues, such as cracked vacuum lines or loose wiring harnesses, that a rushed technician might overlook.
Conclusion
Replacing the CCV filter on your 6.7 Cummins is one of the most straightforward yet vital maintenance tasks you can perform. By staying ahead of the 67,500-mile interval, you protect your turbocharger from oil fouling, prevent expensive seal leaks, and keep your intake sensors functioning at peak performance. Whether you choose to save hundreds of dollars by doing it yourself or opt for professional service, the key is ensuring the work gets done before the “Perform Service” light becomes a permanent fixture on your dashboard.
Next Steps: Check your current mileage and service records. If you are approaching the 65,000-mile mark, go ahead and order a high-quality replacement filter today so you have it on hand. Staying proactive is the best way to keep your Cummins running strong for hundreds of thousands of miles!
💬 Quick Questions & Answers
How often should I change the 6.7 Cummins CCV filter?
The manufacturer recommends replacement every 67,500 miles or when the dash message appears.
What tools are required for the replacement?
You generally only need an 8mm socket, an extension, and a ratchet.
Where is the CCV filter located?
It is located on the very top of the engine, underneath the plastic CCV cover on the valve cover.
Does a clogged CCV filter cause oil leaks?
Yes, it creates high internal pressure that can force oil past gaskets and seals.
What is the most common fault code for a clogged filter?
The P1507 code (Crankcase Filter Restriction) is the most frequent indicator of a clogged filter.
❓ Frequently Asked Questions
What happens if I ignore the ‘Service CCV Filter’ message?
Ignoring the message leads to excessive crankcase pressure, which can blow out oil seals, cause turbocharger issues, and lead to oil-soaked sensors or intake components.
Can I clean the 6.7 Cummins CCV filter instead of replacing it?
No, the filter is made of a dense media designed to trap oil vapor and particulates; it cannot be effectively cleaned and must be replaced with a new unit.
Are there aftermarket CCV filters better than OEM?
While Fleetguard is the OEM provider and highly recommended, reputable brands like Baldwin, Wix, and Donaldson offer high-quality alternatives that meet factory specs.
How do I reset the service message on a Ram 2500/3500?
Turn the ignition to ‘Run’ without starting, then depress the brake pedal twice and the accelerator pedal slowly three times within 10 seconds before turning the key off.
Will a clogged CCV filter affect my truck’s performance?
Yes, it can lead to reduced turbocharger efficiency and may eventually cause the engine to enter a derate mode if the pressure sensors detect extreme restriction.
Why is there oil inside my CCV filter housing?
It is normal to see some oil residue as the filter’s primary job is to separate oil mist from crankcase gases before they are recirculated into the intake.
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