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  #1  
Old 12-20-2011, 08:36 PM
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Catch can filling too fast ?

I would like to know if its a problem or if its happen to someone else.

I have to check my catch can minimum one time a week because it will over fill... IM not sure but I think it fill up a little more rapidly since its colder here (5-10 F).

I read some post on forums and it was more like 1/2" or 1" of liquid in the bottom of the can in two or more weeks !?

I suspect its my PVC valve... what do you think ? (I have 90k on my jeep)

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  #2  
Old 12-20-2011, 10:35 PM
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Re: Catch can filling too fast ?

You have mostly "mayonaise" there. It is probably predominantly condensation. It is much worse in the winter and cold climates. In the summer (unless you're in a real wet climate) it should be just oil, and not very much. I would think that it should not be quite as bad as you're describing though, unless you're driving lots of miles. I had mine fill to the top only once on an 800 mile trip in the winter. I just got back from a 2000 mile trip (~20-55 degrees) and only had about an ounce (1/4 full) in the can. It did have a little condensation too.

For starters, I'd change the PCV Valve and when you install the new one, install it with the hole facing rear. This will insure that there is not a direct shot from the valve to the can/intake, as there would be with it facing the front....hose side.

Can you imagine what your intake/exhaust tract/O2 sensors/catalytic converters would look like after thousands of miles of that crap cycling through? I love my catch cans on both my vehicles.
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Old 12-20-2011, 10:45 PM
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Re: Catch can filling too fast ?

It looks like you got a leak that mayonasise look is coolant mixing with your oil. I head casket leak. My Catch can oil is nice dark looking.
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Old 12-20-2011, 10:48 PM
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Re: Catch can filling too fast ?

Mine looks like that too. Your fine. Don't be worried about anything and I have 140K on my Jeep. I love my oil catch can!
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Old 12-21-2011, 10:44 AM
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Re: Catch can filling too fast ?

Quote:
Originally Posted by Chaoul1 View Post
Mine looks like that too. Your fine. Don't be worried about anything and I have 140K on my Jeep. I love my oil catch can!
x2. Living in the great white north, in the winter it is not unusual for a little water to mix with the oil through condensation. I will often see a little condensed water/oil on the underside of the oil-filler cap. This is especially true if you take multiple short trips - doesn't give the engine enough time to come up to operating temperature and burn off the water vapour.

If you're not loosing coolant, everything is fine...I don't imagine it often gets cold enough in Atlanta for this to be a problem hence the other poster not being familiar with this!
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Old 12-21-2011, 11:17 AM
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Re: Catch can filling too fast ?

Mine started running like crap, checked the CC and it was to the very top with dark fluid. I have never seen the mayo like stuff collected Emptied it last week, and runs much better. Had not checked it in about 2000 miles, as it only collected an ounce or so over the last 6000 miles. Must be the cold weather and short trips. WIll be checking it much more often now.
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Old 12-26-2011, 06:58 PM
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Re: Catch can filling too fast ?

Quote:
Originally Posted by Snow4Lif3 View Post
I would like to know if its a problem or if its happen to someone else.

I have to check my catch can minimum one time a week because it will over fill... IM not sure but I think it fill up a little more rapidly since its colder here (5-10 F).

I read some post on forums and it was more like 1/2" or 1" of liquid in the bottom of the can in two or more weeks !?

I suspect its my PVC valve... what do you think ? (I have 90k on my jeep)
I'll weigh in also:

I check & empty my BT oil catch can every other week. Usually get ~ 3/16"-1/4" of straight oil in the summer and egg nog in the winter (mid-Michigan). I drive ~300 miles per week, mostly 50 mph roads, 20 miles each way. Unscientific observation: I get less oil in the catch can when I use full synthetic 5W-20 than 5W-20 dino oil.

At 90K miles, you are overdue for a new PCV valve (by the maintenance schedule) and the internal spring may be very weak by now, so it sucks more vapor than intended. Change the PCV valve cartridge and do not overfill the crankcase (middle of dipstick range is far enough....for me this is 7 qts of 5W-20 oil exactly).

At least 1 good run per week will minimize water vapor buildup in the crankcase, and therefore, the mayonnaise. [Your picture didn't come thru for me.]

Let us know if it improves after you change the PCV valve cartridge. Thanks.
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Old 11-04-2012, 10:55 PM
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Re: Catch can filling too fast ?

Hey,

I was wondering.. since you have already installed the oil catch can, do you happen to have a picture of how it is installed? I've been looking everywhere but can't seem to find a good example.
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