5 Signs Your Crankcase Filter Needs Replacing (Fleetguard CV52001 for 6.7L Cummins)

Your 6.7L Cummins diesel engine is a powerhouse of performance, but like all high-output machines, it requires consistent maintenance to perform at its peak. One commonly overlooked yet vital component is the crankcase ventilation filter. The Fleetguard CV52001 is the OEM solution trusted by mechanics and Cummins owners alike to maintain clean air within the crankcase, reduce oil consumption, and protect the turbocharger. But how do you know when it’s time to replace it?

Here are 5 key signs your crankcase filter needs replacing, especially if you're using the Fleetguard CV52001 on your 6.7L Cummins-equipped Dodge RAM truck (2007–2024).

1. Excessive Oil Consumption If you're constantly topping off your oil more frequently than usual, a saturated crankcase filter could be to blame. A clogged filter allows less oil mist to be recirculated into the crankcase, leading to increased oil consumption and loss.

2. Increased Blow-By and Oil Drips When the CV52001 filter becomes restricted, pressure builds up in the crankcase, causing blow-by gases to escape through seals. This not only reduces performance but can lead to visible oil drips beneath your vehicle—an early warning sign to replace the crankcase filter.

3. Check Engine Light (CEL) or Diagnostic Codes Modern diesel trucks are equipped with sensors that detect abnormal pressure changes. A failing crankcase filter may trigger the check engine light, especially on 2013+ Dodge RAM models with advanced onboard diagnostics. Codes like P04DB (CCV system disconnected) are often tied to crankcase ventilation issues.

4. Reduced Engine Performance or Whistling Sounds A restricted filter can affect air pressure balance, indirectly impacting turbo efficiency. Drivers often report loss of acceleration power or strange whistling noises from the engine bay—both possible signs your Fleetguard crankcase filter is overdue for replacement.

5. It's Been 67,500 to 75,000 Miles Since Last Replacement Even if you haven’t noticed performance changes, Cummins recommends replacing the CV52001 crankcase filter every 67,500 miles, or 75,000 miles for 2019+ Dodge RAM trucks. Preventive maintenance ensures optimal engine longevity and cleaner emissions.

Why Use the OEM Fleetguard CV52001? This filter features NanoNet advanced filtration media, durable housing, and compatibility with models like the Dodge RAM 2500–5500, Sterling Bullet, and Ford F-650. It separates oil mist efficiently, reduces pressure buildup, and ensures your 6.7L Cummins diesel engine operates smoothly.

Conclusion Ignoring crankcase filter maintenance can lead to costly repairs and reduced engine performance. By recognizing the signs and choosing the OEM Fleetguard CV52001, you protect your diesel investment and maintain peak operating conditions.