Table of Contents

What the CCV Filter Does on a 6.7 Cummins

Every diesel pushes some combustion gas past the piston rings. That blow-by carries oil mist with it. Since 2007, the 6.7L Cummins has routed that gas back toward the intake instead of venting it outside.

The CCV filter sits in that path, on top of the valve cover and usually under the plastic dress cover. It is a coalescing filter. Oil droplets cling to the media, merge into larger drops, and drain back to the engine. The cleaner gas continues to the turbo inlet.

The media loads with soot and oil over time. Once it is saturated, it stops separating oil and starts restricting flow. That is when crankcase pressure climbs.

How Often to Change the CCV Filter

Ram publishes the interval by model year. The mileage numbers below match what major diesel parts sellers list for these trucks.

Model Year Typical Interval Approximate Time
2007.5 to 2018 67,500 miles About 54 months
2019 to 2024 75,000 miles About 60 months

Most trucks show a "Perform Service" message when the interval is reached. That message runs on a mileage and time counter, so it can appear before the filter is truly restricted, and changing the filter does not clear it (reset steps are below).

Before you order: Confirm the interval and the filter part for your exact year and VIN in your owner's manual or with a Ram parts counter. The 2019 and newer trucks are on a different schedule.

When to Change It Earlier

The published interval assumes average use. Work trucks rarely live there. Plan on an earlier inspection if your truck sees any of these:

  • Regular heavy towing or hauling
  • Long idle periods on jobsites, which keep the engine too cool to burn off crankcase moisture
  • Dusty roads, fields, or construction sites
  • Cold climates where condensation loads up the crankcase

Several diesel shops suggest a look at the filter around 30,000 to 50,000 miles for severe duty trucks. That is shop guidance, not a Ram requirement.

Symptoms of a Clogged CCV Filter

A restricted filter does not fail with a bang. It builds up over thousands of miles. Watch for these signs:

  • Service message: A "Perform Service" or crankcase filter message on the cluster.
  • Code P1507: Crankcase filter restriction. A scan tool will show it, and it is a stronger signal than the timer message.
  • Rising oil consumption: You add oil more often and find no drip on the driveway.
  • Oil film in the intake: A wet, oily coating inside the charge pipes, turbo inlet, or intercooler.
  • Oily residue near the valve cover: Moisture around the filter housing or oil filler cap.
  • Rough idle or blue smoke on cold start: Oil mist burning in the combustion chamber.
  • New seal or gasket leaks: Pressure inside the crankcase pushes oil past weak points.

None of these alone proves the filter is bad. Several of them together, plus a filter past its interval, point straight at it. A P1507 usually means the filter, but a frozen or pinched vent hose in sub-zero weather has also been reported to set it, so check the hose too.

The Oil Cap Check

Many diesel owners use a quick check before they pull anything apart.

  1. Let the engine idle.
  2. Loosen the oil filler cap, but leave it sitting on the opening.
  3. Watch how it behaves.

An inline-six pulses naturally, so a cap that rattles lightly or hums is normal. A cap that is pushed off steadily, or a continuous forceful stream of gas and oil spray, points to high crankcase pressure.

Safety note: Work around a running engine with care. Keep hands, sleeves, and tools clear of belts and the fan, and do not remove the cap completely.

This is a screening step, not a diagnosis. A shop can measure crankcase pressure with a manometer for a firm answer.

What Happens If You Ignore It

When the filter clogs, crankcase pressure climbs. That pressure has to go somewhere. Over time that can mean:

  • Oil carried into the turbo compressor and intercooler
  • Oil mixing with the dry soot from the EGR system and forming sludge in the intake path, which takes a teardown and cleaning to remove
  • Leaks at the front or rear main seal. A rear main leak can mean pulling the transmission, and a new seal can leak again if the clogged filter is never addressed
  • Pressure working against the turbo oil drain, which can push oil past the turbo seals and get a healthy turbo blamed for the problem

Each of those costs far more than the filter, and a work truck loses days parked.

Replacing the CCV Filter on a 6.7 Cummins

Installation difficulty: Easy to moderate. Most owners with basic hand tools can do it in under an hour.

What you need:

  • The correct filter element for your model year. Fleetguard CV52001 is the common cross-reference for these engines. Mopar part numbers have been superseded over the years, so confirm yours by VIN. Parts listings commonly show roughly $70 to $150 depending on brand
  • Basic hand tools (metric sockets and extensions, plus a screwdriver for hose clamps)
  • A clean rag for the sealing surface
  • A cool engine

The job in short:

  1. Let the engine cool, then remove the plastic dress cover.
  2. Disconnect the ventilation hose from the filter housing.
  3. Remove the housing bolts (8 mm on most trucks) and lift off the housing.
  4. Pull the old filter element. Expect it to be heavy and oily.
  5. Wipe the sealing surface clean, then seat the new element and its seal flat.
  6. Reinstall the housing and tighten the bolts by hand tool. A figure of about 10 Nm (89 in-lbs) is commonly cited, so confirm it in the factory service manual.
  7. Reconnect the hose and refit the cover.

Do not use an impact driver. The housing is plastic and cracks easily. Do not clean and reuse the element. The media is built to be replaced, and cleaning rarely restores it.

Resetting the "Perform Service" Message

The reminder will not clear by itself. The procedure widely published for these trucks goes like this:

  1. Turn the ignition to ON without starting the engine.
  2. Press and release the brake pedal twice.
  3. Press the accelerator slowly to the floor twice within 10 seconds.
  4. Turn the ignition OFF.
  5. Start the truck. If the message returns, repeat the steps.

Check your owner's manual or Ram diesel supplement for your year, since the sequence can differ slightly between trucks.

CCV Filter Replacement vs CCV Reroute Kit

Some owners get tired of the service cycle and look at a CCV reroute kit. The kit moves the crankcase vent path away from the intake, often to a catch can or a vent line. The goal is to keep oil mist out of the turbo and charge pipes.

Important: CCV reroute kits are intended for off-road, race, or non-public-road use where permitted. Customers are responsible for confirming federal, state, and local compliance before purchase and installation.

If your build fits that use, you can browse 6.7 Cummins CCV reroute kits by year and check fitment on each product page.

  OEM Filter Replacement CCV Reroute Kit
Keeps factory ventilation system Yes No
Recurring filter service Yes, per interval No filter to service
Oil mist reaching the intake Reduced, rises as the filter loads Routed away from the intake
Extra upkeep Replace on schedule Empty the catch can or check the vent line
Fault code risk Low Altering the factory path can set CCV codes such as P04DB. Check the product page for tuning notes
Intended use Daily driven and inspected trucks Off-road, race, or non-public-road use where permitted

A reroute is not maintenance-free. A catch can fills and needs emptying. A vent line needs a look for leaks and clean routing. Cold weather adds a risk: moisture in the blow-by can freeze in a vent line and block it. Run the line with a continuous downward slope, avoid sags and low spots, and follow the kit's hose size instructions. A blocked vent leaves crankcase pressure nowhere to go.

If the truck is registered, driven on public roads, or subject to inspection, stay with the factory filter and the service schedule.

Before You Buy

Run through this list before you add anything to a cart:

  • Year, model, and engine confirmed as a Ram 6.7L Cummins
  • Model year range checked against the 2007.5 to 2018 and 2019 and newer split
  • Intended use settled: daily driver, work truck, or off-road build
  • Past modifications noted, since they change fitment and routing

Not sure about a crossover year or a modified truck? Send your year, model, engine, cab style, bed length, and photos of your setup to EngineGo support before you order.

Frequently Asked Questions

What does code P1507 mean on a 6.7 Cummins?

It means crankcase filter restriction. A saturated filter is the usual cause. Inspect the filter and the vent hose before you replace anything else.

Will a new filter improve power or fuel economy?

If the old filter was badly restricted, a new one can restore normal ventilation and cut oil carryover. EngineGo does not promise horsepower or mpg gains from a filter change.

Does a reroute kit remove the need for service?

It removes the filter service, but adds catch can or vent line upkeep. Our CCV reroute breakdown for the 6.7 Cummins covers the tradeoffs. It is for off-road or race use where permitted, not a shortcut for a daily driver.

Does the CCV filter on a Power Stroke work the same way?

The purpose is the same, but the assembly, location, and service steps are different. Use our Power Stroke CCV filter walkthrough for Ford trucks.