Catchcan PCV system vs valve cover breathers.
Catchcan PCV system vs valve cover breathers. I've been having oil consumtion through the PCV, With my engine the PCV oil mist get's right pass my catchcan but leaves almost no oil in the catchcan but totally leaves an oily film all over my intake and the back of my throttle body. also the oil has been causing KR at WOT. Recently I've been running three breathers from the crankcase and valve covers to the open air. No more oil in the intake or all over my intake runners. Does anyone know how to seperate the oil mist from the crankcase air? My AMW catch can will stop oil but not oil mist. Should I run a catchcan with an oil/air seperator together maybe? I would rather run a closed system but I dont want that oil all over my intake and heads anymore. 
And as far as running crankcase breathers? I hear running breathers is bad for your rings.
So the main Questions are:
(1) Is there any long term Ill effects on my engine or piston rings of running breathers?
(2) Will an oil/air seperator stop oil mist?
(3) and if an oil/air seperator will work, where can I find aircraft oil/air seperator?
(4) Has anyone had good result's with a cadillac air pump?
I've been battling this for a while, I wish I can find somthing that works.
Thanx in advance.
And as far as running crankcase breathers? I hear running breathers is bad for your rings.So the main Questions are:
(1) Is there any long term Ill effects on my engine or piston rings of running breathers?
(2) Will an oil/air seperator stop oil mist?
(3) and if an oil/air seperator will work, where can I find aircraft oil/air seperator?
(4) Has anyone had good result's with a cadillac air pump?
I've been battling this for a while, I wish I can find somthing that works.
Thanx in advance.
Last edited by Oatmeal; Mar 3, 2005 at 10:35 AM.
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From: Fat Chance Hotel
Get a small piece of porous foam or cloth and make a "filter" element for the catch can. This way the oil won't be sucked right through the can an into the intake. You'll need to make something like a baffle to keep the cloth/foam from getting pulled into the outlet port and blocking it. Wire mesh might be useful.
Originally Posted by technical
Get a small piece of porous foam or cloth and make a "filter" element for the catch can. This way the oil won't be sucked right through the can an into the intake. You'll need to make something like a baffle to keep the cloth/foam from getting pulled into the outlet port and blocking it. Wire mesh might be useful.
The only thing that stops it Is getting rid of the PCV system all together(This is temporary for now) I could be wrong but I hear that's bad on rings in the long run. I had that problem... AMW cat fixed it. How short did you cut the hose going from the PCV to the can? Maybe try rerouting it and giving the air/oil mist a chance to cool down.. maybe the can will work better that way. just a thought....
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Originally Posted by JL ws-6
I had that problem... AMW cat fixed it. How short did you cut the hose going from the PCV to the can? Maybe try rerouting it and giving the air/oil mist a chance to cool down.. maybe the can will work better that way. just a thought....
. I mounted mine on the passenger's side head in the front near the belt tensioner. The hose I have on mine is rather long, as it comes off the pcv, down to where the A/C hose is and is zip tied to the a/c hose and around to the cover on the catch can. The hose leaving the can is short right to the intake. I was doing the coolant bypass and while I had the lid and bellow off to route the line that's when I noticed the oil in the bottom of the TB. I looked in the intake, and it looked like a pond. I sopped it all out with rags on a ruler, and then sprayed some carb clean in there and wiped that out... and cleaned the TB off too when installing the catch can. I looked inside the TB with a bright flashlight.. and there's no oil residue at all now... and the can had a buttload of oil in it after about 800 miles... so I think that it's working. I'd lost the alum lines.. they heat up probably more than the hose that the can came with, and try routing about 2 feet of hose ( I figure that's about what I have ) and see what that gets you. Hopefully will solve your problem.
Originally Posted by technical
If oil mist is still getting in through it makes me wonder if the other side of the system is plugged or capped. The hose that runs to the TB...is it present and clear from obstructions?
. my other LS1 never did this. The odd thing is my old car used to collect oil in the catchcan and leave the intake pretty much clean but this car leaves hardy anything in the catch can but leaves my intake . What are the long term effects of running valve cover breathers instead of the stock PCV? Anything?
. What are the long term effects of running valve cover breathers instead of the stock PCV? Anything? Last edited by Oatmeal; Mar 3, 2005 at 07:52 PM.
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From: Pembroke Pines,FL
I just swapped out my intake for an LS6 & it also was very oily. I've been running a catch can but the same oily mist was getting through. So I installed a fuel filter between the catch can & intake, problem seems to be fixed. You just need to replace it once in awhile. I use the plastic ford type that has the element underneath( I have also seen people use the VW type). Hope this helps.
i myself got tired of covering new parts with oil from the pcv...did the catchcan thing and that helped...but i stopped it by running breathers on my new motor....no problems so far ...though it will make any weak spots in your gaskets or seals show up...it does make you change your oil more often...
i use full synthetic and change it every 2500 to 3k miles...
just my .2 cents....but my car is not a dd either..
98ss a4 4000tci 373 heads etc etc....
i use full synthetic and change it every 2500 to 3k miles...
just my .2 cents....but my car is not a dd either..
98ss a4 4000tci 373 heads etc etc....