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Dodge Ram 2009-Present: How to Make an Oil Catch Can

Learn how to make your own oil catch can. Your PCV system will thank you!

By Gabriella Massari - July 1, 2015
Contributors: drought_buster

This article applies to the Dodge Ram 1500 (2009-Present).

Oil catch cans are used to aid the PCV (Positive Crankcase Ventilation) system in getting rid of fumes from the crankcase. Inevitably, during the engine combustion process, oil moisture leaks into the crankcase. This can works to catch as much of the vapor as possible, allowing cleaner gases to return through the intake. What's left is a can that condenses vapor to liquid oil, so the can needs to be drained occasionally of course. Compared to buying one for around $130, making your own oil catch can is cost-effective and easy. Learn how to complete this DIY job with just a few materials and a little time.

Materials Needed

  • Air compressor filter
  • Two (2) 1/4" thread to 3/8" barbs
  • Three (3) feet of 3/8" rubber fuel line
  • Zip ties
  • Cutting shears

These materials can be found at Home Depot and O'Reilly's Auto Parts. View the links in the Related Discussion and Sites section below to browse similar products online.

Step 1 – Remove tube from the PCV system

Remove the black tube (shown in Figure 1) from the PCV system in your truck.

Figure 1. Tube to be removed.

Step 2 – Install new hose and filter

Take the new rubber hose and install one end into the existing 90-degree fitting on the PCV. Install the other end to the vacuum grommet in the upper intake. Using zip ties, secure the filter to the existing wires. Next, take your cutting shears and cut the new hose. Lastly, place the air compressor filter you purchased online to the rubber hose.

  • Figure 2. New hose and filter secured with zip ties.
  • Figure 3. Removed tube placed on top of new for reference.

Pro Tips

  • You can go up to 1/2" rubber hose if you don't feel comfortable pushing the hose into the existing grommets. Then you can slide it on top of the PCV instead of shoving it inside the grommets.
  • Alternatively, you could use a crimp coupler from 3/8" to 1/2". You would then need to buy two sizes of hose.
  • If you're concerned about your warranty, simply keep the old rubber tube and re-install it whenever you make a trip to the dealer for maintenance.

Related Discussion and Sites