When it comes to maintaining a 6.7 Cummins diesel engine, replacing essential filters on time is crucial for performance and longevity. One of the most overlooked components in the crankcase ventilation system is the CCV (Crankcase Ventilation) filter. The 68157291AA is the OEM CCV filter designed specifically for Dodge RAM 2500, 3500, 4500, and 5500 trucks equipped with the 6.7 Cummins engine.
Many truck owners wonder: How often should you change the 68157291AA CCV filter? Ignoring this vital component can lead to excessive oil consumption, pressure buildup, and even engine damage. In this guide, we’ll cover everything you need to know about the 68157291AA CCV filter, including its function, replacement intervals, and why keeping it clean is essential for optimal engine performance.
What Does the 68157291AA CCV Filter Do?
The 68157291aa CCV filter is responsible for capturing and filtering oil vapors from the blow-by gases that escape from the engine’s combustion process. These gases contain a mix of oil mist, fuel residue, and contaminants, which can cause carbon buildup if they aren’t filtered properly.
The CCV system ensures that excess oil vapors don’t enter the air intake system, preventing engine wear, turbocharger damage, and emissions problems. Without a properly functioning CCV filter, your 6.7 Cummins engine may experience oil leaks, increased emissions, and reduced efficiency.
How Often Should You Replace the 68157291AA CCV Filter?
RAM and Cummins recommend replacing the 68157291AA CCV filter every 67,500 miles. However, this interval can vary based on driving conditions, load, and overall maintenance habits.
Factors That Affect CCV Filter Lifespan:
Heavy-Duty Towing Hauling
- If you frequently tow heavy loads or haul cargo, your engine works harder, producing more blow-by gases. This can cause the CCV filter to clog faster, requiring earlier replacement (around 50,000–60,000 miles).
Driving Conditions
- Trucks operating in dusty, off-road, or extreme weather conditions may experience faster filter saturation. Replacing the 68157291AA CCV filter sooner in these environments helps maintain optimal performance.
Oil Quality Maintenance
- Regular oil changes with high-quality diesel oil can help reduce contamination in the crankcase ventilation system, extending the lifespan of the CCV filter.
Check Engine Light (CEL) Alerts
- If your check engine light appears and you notice reduced fuel efficiency or increased oil consumption, the CCV filter may be clogged and require immediate replacement.
Signs That Your 68157291AA CCV Filter Needs Replacement
Ignoring CCV filter maintenance can lead to serious engine issues. Look out for these warning signs:
1. Excessive Crankcase Pressure
A clogged CCV filter restricts airflow, leading to excessive pressure buildup in the crankcase. This can damage seals, gaskets, and even cause oil leaks.
2. Increased Oil Consumption
A failing CCV filter may allow oil vapors to pass through unchecked, leading to higher oil consumption and potential turbocharger contamination.
3. Oil Leaks Around the Engine
If you notice oil leaks near the valve cover or around gaskets, it may be due to excessive crankcase pressure caused by a clogged 68157291AA CCV filter.
4. Reduced Fuel Efficiency Power Loss
Dirty CCV filters can lead to oil mist accumulating in the intake system, reducing airflow and causing a loss of power, sluggish acceleration, and lower MPG.
5. Check Engine Light (CEL) Activation
A failing CCV filter can trigger a check engine light due to pressure irregularities in the crankcase system. If this happens, inspect and replace the 68157291AA filter immediately.
How to Replace the 68157291AA CCV Filter
Replacing the 68157291AA CCV filter is a straightforward process that most truck owners can DIY in under an hour. Here’s a simple step-by-step guide:
Tools Supplies Needed:
- New 68157291AA CCV filter (OEM recommended)
- Socket wrench set
- Screwdrivers (if needed)
- Shop towels for cleanup
Step-by-Step Instructions:
Locate the CCV Filter Housing
- The CCV filter is housed on top of the engine, under a plastic engine cover.
Remove the Engine Cover
- Use a socket wrench to remove the bolts securing the engine cover, then lift it off.
Take Out the Old CCV Filter
- Unscrew and carefully remove the old 68157291AA CCV filter.
Install the New CCV Filter
- Place the new 68157291AA filter into the housing and secure it properly.
Reattach the Engine Cover
- Reinstall the plastic engine cover and tighten the bolts.
Check for Proper Fitment
- Ensure everything is secure before starting the engine.
OEM vs. Aftermarket: Which CCV Filter Should You Use?
When replacing your CCV filter, you have two options:
OEM 68157291AA CCV Filter (Recommended)
- Meets RAM Cummins specifications, ensuring perfect fitment and optimal performance.
- Designed to handle blow-by gases efficiently, keeping your engine clean.
Aftermarket CCV Filters
- Some aftermarket brands offer cost savings, but quality and fitment may vary.
- If choosing aftermarket, ensure it meets OEM specifications.
Final Thoughts
Changing the 68157291AA CCV filter on time is essential to prevent oil leaks, reduce emissions, and extend engine life. The recommended interval for replacement is every 67,500 miles, but heavy-duty use may require earlier changes.
For genuine OEM CCV filters, visit Mopar Truck Filters to ensure your 6.7 Cummins stays in peak condition. Don’t wait until it’s too late—replace your CCV filter today!
