6.7 Cummins Crankcase Filter

Why Does Your 6.7 Cummins Need a Crankcase Filter?

Every Piston Stroke Pressurizes the Crankcase

Blow-by gases slip past the rings on every power stroke, and in a closed crankcase ventilation system those gases get routed through the CCV filter and back into the intake instead of venting to atmosphere. The filter's job is stripping the oil mist out of that vapor stream before it re-enters the engine. It is the only thing standing between oily crankcase vapor and your intake, turbo, and intercooler.

A Loaded Filter Turns Pressure Into Leaks

When the filter media saturates and clogs, the path restricts and crankcase pressure climbs. Pressure finds the weakest exits: rear main seal, valve cover gaskets, the oil pan. Owners chase leaks with new seals while the clogged filter, the actual cause, keeps loading. Fresh media restores the flow path and lets the seals live the life they were designed for.

Unfiltered Vapor Varnishes the Charge Side

Skip the filter long enough and oil film works through the intake tract, coating the turbo compressor, the intercooler, and the intake manifold. Intercooler efficiency drops, oil consumption climbs, and the mess only gets more expensive to clean. The filter is a few minutes of service that prevents hours of degreasing.

What Can a Fresh CCV Filter Solve?

Restores Proper Crankcase Ventilation

Our replacement filters drop into the factory breather housing with media sized to the original flow spec, restoring the closed ventilation circuit to the way Cummins engineered it. Pressure normalizes, the seals stop fighting a losing battle, and the vapor the engine re-breathes arrives clean instead of carrying oil.

Protects Seals, Turbo, and Intake

The immediate beneficiaries are the leak-prone seals, the rear main and valve covers, followed by the turbo and charge piping downstream. Owners who service the filter on schedule routinely report oil consumption settling and weeping seals drying up, because the pressure driving both problems is gone.

Fits the Truck You Actually Drive

Coverage is split by configuration to match the breather assemblies Dodge fitted: the CCV filter for the 2007-2018 Ram 2500 and 3500, and the ISB breather filter for 2008-2021 trucks including the 4500 and 5500 chassis cabs. From a 2008 work truck to a 2021 Ram 3500, the right filter is on this page, and our support team confirms the match from a VIN in minutes.

Shop 6.7 Cummins Crankcase Filter by Dodge Ram Engine & Fitment Guide

• Crankcase Ventilation CCV Filter (2007-2018 Ram 2500/3500) - Fits the 6.7L Cummins in Dodge Ram 2500 and 3500 pickups (2007-2018). The closed crankcase ventilation filter for the first twelve years of the platform, covering the 2007.5 launch trucks, the 2010-2012 DPF-era rigs, and the 2013-2018 fourth gens.
• Crankcase Breather Filter for ISB (2008-2021 Ram 2500-5500) - Fits the 6.7L Cummins ISB in Dodge Ram 2500, 3500, 4500, and 5500 (2008-2021). The breather-side filter covering the medium-duty chassis cabs and the fifth-generation era through the 2021 model year.

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FAQs About 6.7 Cummins Crankcase Filter

What does the CCV filter do on a 6.7 Cummins?

The 6.7 runs a closed crankcase ventilation system: blow-by gases from the crankcase are routed through the CCV filter, which strips the oil mist out, and the cleaned vapor re-enters the intake to be burned. The filter is the system's only line of defense between oily crankcase vapor and your turbo, intercooler, and intake manifold.

When it loads up, two things happen: the vapor that passes through arrives dirty, and the crankcase pressurizes because the flow path restricts. Both cost you money downstream, which is why this little filter deserves the same respect as fuel filters.

Where is the crankcase filter located on a 6.7 Cummins?

On the driver's side of the engine. The filter lives inside the breather housing on the valve cover area, under a cover that comes off with basic hand tools, no lifting, no special service positions. On most trucks the intake tube needs to move aside for clear access, and the whole job happens from the top of the engine bay.

Because it hides under plastic, the filter is easy to overlook for years, which is exactly how so many 6.7s end up with crankcase pressure problems on an original element. Once you have done it once, the location is impossible to forget.

What are the symptoms of a clogged CCV filter?

The classic trio: oil leaks, rising oil consumption, and oily residue in the charge side. Crankcase pressure pushes past the rear main seal and valve cover gaskets, consumption climbs with no visible puddle because vapor carries the oil into the intake, and the turbo compressor and intercooler boots pick up a varnish film.

Some owners also notice a whistling or wheezing from the breather under load as the engine tries to exhale through a restricted path. If your 6.7 is leaking from multiple seals at once, check the crankcase filter before condemning the seals, because replacing seals while the pressure cause remains is paying twice for the same leak.

How often should you change the CCV filter on a 6.7?

The common guidance lands between 30,000 and 67,500 miles depending on duty cycle, with severe service, towing, idling, short hauls, pulling the low end. Many owners simply tie it to every second or third oil change interval and never think about it again, which is exactly the right instinct.

High-mileage trucks that have never seen a fresh element benefit from an immediate change regardless of interval math. It is one of the cheapest services on the engine and one of the most effective at preventing expensive seal work.

How do I change the crankcase filter on a 6.7 Cummins?

It is a straightforward driveway job. Clear the intake tube for access, release the breather housing cover on the driver's side of the engine, swap the old element for the new one, and reassemble. No special tools, no fluids to drain, and the whole service runs well under an hour even at a relaxed pace.

The cost question owners ask about is really a labor question, and the answer is that there is almost none: doing it yourself with one of our filters costs the part and a few minutes. Compared to a rear main seal job caused by neglecting it, the math never gets close.

Which years do these crankcase filters fit?

Between the two configurations, the full platform run is covered. The CCV filter fits the 2007-2018 Ram 2500 and 3500, from the 2007.5 launch trucks through the 2010-2012 DPF era and the 2013-2018 fourth gens. The ISB breather filter fits 2008-2021 trucks including the 4500 and 5500 chassis cabs, carrying coverage through the fifth-generation Rams.

That means the 2014, 2015, 2016, 2017, and 2018 trucks that dominate the keyword searches are all served, and the 2019 through 2021 Rams land on the breather filter. Match the filter to your configuration, or let our support team confirm from the VIN.

Is the CCV filter the same as the crankcase breather filter or PCV filter?

Same system, different names. CCV filter, crankcase filter, crankcase vent filter, breather filter, and closed crankcase ventilation filter all describe the element cleaning crankcase vapor on the 6.7. The PCV terminology carried over from gasoline engines, where a positive crankcase ventilation valve does similar work; the diesel version is a filtered closed circuit rather than a valve.

Whatever you call it, the service is the same: fresh element on a schedule, dry seals and a clean intake as the reward. Both filter configurations on this page serve that role for their respective truck generations.

Which crankcase filter part number fits my truck?

Mopar and Cummins service numbers vary across the 2007-2021 run, and the honest answer is that fitment follows your truck's breather configuration rather than one universal number. The two filters here are split at the assembly level: the CCV filter for the 2007-2018 Ram 2500/3500 configuration and the ISB breather filter for the 2008-2021 trucks through the 5500 chassis cabs.

The fastest way to the right element is sending us your VIN, which our 24/7 support team matches to the correct filter in minutes. That beats guessing at part numbers and waiting on a return when the wrong element shows up.

CCV filter or CCV reroute kit: which should I run?

They solve different problems. The filter maintains the factory closed system: vapor is filtered and re-breathed, emissions function stays intact, and it is street-legal maintenance everywhere. That is the right answer for the overwhelming majority of trucks.

A CCV reroute or delete kit, which we carry in our other collections, vents crankcase vapor to atmosphere or through a catch can instead, eliminating the filter service entirely. That is a modification for off-road configurations, and it trades stock emissions function for simplicity. Daily drivers and towers are best served by a fresh filter on schedule.

Are these crankcase filters street legal, and what is the warranty?

Yes, completely. CCV and crankcase breather filters are emissions-preserving maintenance parts, the closed ventilation system keeps functioning exactly as designed, so they are legal everywhere with no off-road restriction. That distinguishes them from the delete and reroute upgrades elsewhere in our catalog, which are sold for competition and closed-course off-road use only.

Fitment is configuration-specific across the 2007-2021 Ram 2500, 3500, 4500, and 5500 family, so confirm your generation or contact our 24/7 support and we will match it. Every order ships free from our US warehouses, carries a 1-year warranty, and is backed by a 45-day return policy if the fitment is not right.

Related 6.7 Cummins Collections

Explore the rest of the 6.7 Cummins lineup:

• 6.7 cummins upgrades - Performance parts and upgrade kits for 6.7L Cummins Ram 2500 and 3500 trucks.
• ram 6.7 egr delete kit - EGR delete hardware for off-road and competition 6.7 Cummins builds.