2021 Ram 2500 Crankcase Filter Replacement Guide

Your 2021 Ram 2500, powered by the 6.7L Cummins diesel, is a workhorse built for strength and durability. But like any high-performance engine, it needs regular maintenance to keep it running at its best. One of the most overlooked yet essential components is the 2021 ram 2500 crankcase filter, also known as the crankcase ventilation (CCV) filter.

The CCV filter helps remove oil vapors from the crankcase gases before they are recirculated into the intake. Over time, it becomes saturated and loses efficiency, which can lead to increased emissions, reduced performance, and even engine damage. This guide will walk you through everything you need to know about replacing the crankcase filter in your 2021 Ram 2500.

Why the Crankcase Filter Matters

The crankcase filter plays a critical role in your diesel’s emissions system. As your engine runs, combustion gases leak past the piston rings into the crankcase. These gases contain oil vapors and contaminants. The CCV filter captures these vapors, preventing them from entering the intake and causing carbon buildup.

A clogged crankcase filter can lead to:

• Excessive oil consumption
  
  

• Higher crankcase pressure
  
  

• Reduced turbocharger life
  
  

• Lower fuel efficiency
  
  

• Potential engine oil leaks
  
  

Replacing it at the recommended interval ensures your Cummins stays clean and efficient.

Replacement Interval for the 2021 Ram 2500 CCV Filter

For the 2021 Ram 2500 with a 6.7L Cummins engine, Ram recommends replacing the CCV filter every 67,500 miles or sooner if you notice performance issues. This service interval is crucial for preventing excessive crankcase pressure, which can damage seals and gaskets.

If you use your truck for heavy towing, off-road driving, or in extreme climates, consider checking the filter more often.

Tools & Parts You’ll Need

Before starting, gather the necessary items:

• OEM Mopar crankcase filter (or a high-quality equivalent)
  
  

• Ratchet wrench with socket set
  
  

• Torque wrench (for precise installation)
  
  

• Clean shop towels
  
  

• Safety gloves
  
  

• Mild degreaser (optional for cleaning housing)
  
  

Pro Tip: Always choose genuine Mopar filters for best fit and performance. Aftermarket versions may not provide the same filtration efficiency or lifespan.

Step-by-Step Crankcase Filter Replacement

1. Prepare Your Truck

Park your Ram 2500 on a flat, stable surface. Turn off the engine and allow it to cool completely. Open the hood and locate the crankcase filter housing—typically on top of the engine, near the valve cover.

2. Remove the Engine Cover

If your truck has a plastic engine cover, gently lift it off to expose the filter housing. Set the cover aside in a safe place.

3. Access the CCV Filter Housing

Using the appropriate socket, loosen the bolts securing the crankcase filter cover. Keep the bolts in a safe spot—you’ll need them for reinstallation.

4. Remove the Old Filter

Lift the filter straight out of the housing. Be careful not to spill any trapped oil vapors. Use shop towels to wipe away any residue inside the housing.

5. Install the New Filter

Place the new crankcase filter into the housing, making sure it sits evenly. Replace the cover and hand-tighten the bolts before securing them with a torque wrench to factory specifications.

6. Reinstall the Engine Cover

Once the filter is secured, reinstall the engine cover and press it into place.

7. Start the Engine & Check for Leaks

Start your truck and let it idle for a few minutes. Check the filter housing area for any signs of leaks or unusual noises.

Resetting the CCV Service Indicator

On many 2021 Ram 2500 trucks, the instrument cluster will display a “Perform Service” message when the CCV filter is due. After replacement, reset the indicator:

1. Turn the ignition to the “ON” position without starting the engine.
   
   

2. Press the accelerator pedal fully three times within 10 seconds.
   
   

3. Turn the ignition off.
   
   

4. Restart the truck to confirm the message is gone.

Maintenance Tips for a Longer-Lasting Engine

• Stick to recommended service intervals for all filters.
  
  

• Use high-quality engine oil designed for diesel engines.
  
  

• Inspect your crankcase filter housing during routine oil changes.
  
  

• Avoid prolonged idling, which can accelerate filter saturation.

Final Thoughts

Replacing the crankcase filter on your 2021 Ram 2500 is a straightforward job that can save you money and extend your Cummins engine’s lifespan. With just a few tools, an OEM filter, and about 30 minutes of your time, you can keep your truck running clean, efficient, and powerful.

FAQs

1. How often should I replace the crankcase filter on my 2021 Ram 2500?
Every 67,500 miles under normal driving conditions, or sooner in harsh environments.

2. What happens if I don’t replace the CCV filter?
It can cause high crankcase pressure, oil leaks, turbo damage, and reduced performance.

3. Can I clean and reuse my crankcase filter?
No. These filters are designed for one-time use and must be replaced.

4. Is an aftermarket CCV filter safe for my Cummins engine?
While some are acceptable, OEM Mopar filters are recommended for best protection and fit.

5. How much does it cost to replace the crankcase filter?
Typically $100–$150 for parts, plus labor if done at a shop. DIY replacement can save on labor costs.