I finally got around to emptying my catch can today during an oil change. Oddly, when i pulled the tap, only water came out? I had about 1 cup of water that came out of the can and little or no oil. We drained it into a can that already had a spot oil, so couldn't be sure if any at all came out. The can sits in front of the driver's headlight since ther was no room left with the PL kit and the FPR mounted on the firewall. Has anyone found just water in a catch can before? All I can think is that it is condensation that got trapped somehow, but the can is not set up properly to catch oil?


I'm baffled

 

it sounds like its just condensation. I get quite a bit in mince since they are mounted in the fenderwell and get a lot of "cool" air around them.

 

But you get oil in there too right? I don't think I had a drop for 6,500 miles of driving (2 oil changes)

 

Depends on how you have it plumbed and which PCV vents you have it hooked up to.

 

Exactly what I found when I drained mine..Didn't seem to cause any problem..

 

the fact that you have no oil is a good thing if it's properly plummed. That means you aren't getting any blow by.

Remember that hot air hitting a cold surface causes condensation (cold pop can on a hot day) therefore hot air from inside the crankcase hits a nice cold catch can and the moisture will condense. This happens enough times and it will fill up. If you are in a humid area this will happen faster. You can eliminate this by keeping your catch can re-circulated back to your engine and not open to the environment.

 

i wish i didn't get oil in my can. I've tried so many ways.

 

not driving the car tends to keep oil of the catch can

 

yeah, not a garage queen, so I guess i will have to deal with it I enjoy it regardless.