xspquest Posted September 1, 2009 Report Share Posted September 1, 2009 Has anyone some info or solutions on how and why I have oil coming out of valve cover breather in back? And making a mess over time may I add. Info is a nvj head and other minors ( hard pipes, xsbov, msd) but mostly stock. Any help???? PS what is an easy way to check my O2 sensor(bosch 4 wire). Thanks Link to comment Share on other sites More sharing options...
joe87tsi Posted September 1, 2009 Report Share Posted September 1, 2009 oil will come out of the breather with the air it is venting. Link to comment Share on other sites More sharing options...
BrazilBoy Posted September 1, 2009 Report Share Posted September 1, 2009 (edited) More boost than stock + breather=oil mess More boost than stock + Oil Sep Can= No oil mess There ya go Oh yeah if your PCV is silver and not gold colored you have the wrong one... Edited September 1, 2009 by BrazilBoy Link to comment Share on other sites More sharing options...
Indiana Posted September 1, 2009 Report Share Posted September 1, 2009 Classic 90s mod, throw the oil separator in the trash and let the crankcase blowby pressure pass the oil out a little filter in the back or a hose that dangles where you can't see it and make a mess and loose oil. I don't suppose you know what the oil separator is do you or have those pieces any longer? One thing you could do is go to your local Mitsubishi dealer and get a new OEM PCV valve. They are about $5-6.00 but the issue to reduce that oil loss you have is a working oil separator system whether its a stock one or one you come up with. If just left alone like you have it the side effect is oil loss and a messy engine bay but its also that piston rings seal better if there isn't pressure in the crankcase, or at least the lower the better you might say. Link to comment Share on other sites More sharing options...
cyberquest Posted September 1, 2009 Report Share Posted September 1, 2009 you may want to read this topic that cover crankcase venting, the breather on the back of the valve cover is a bad idea. http://starquest.i-x.net/viewtopic.php?t=1218 Link to comment Share on other sites More sharing options...
slydogg Posted September 1, 2009 Report Share Posted September 1, 2009 he probably purchased the car that way. lets go easy on him. for now!! Link to comment Share on other sites More sharing options...
xspquest Posted September 2, 2009 Author Report Share Posted September 2, 2009 he probably purchased the car that way. lets go easy on him. for now!! GUILTY AS CHARGED... :confused0024: Link to comment Share on other sites More sharing options...
Indiana Posted September 2, 2009 Report Share Posted September 2, 2009 I assumed you recently got this car and that was done before you got it. Link to comment Share on other sites More sharing options...
Shelby Posted September 6, 2009 Report Share Posted September 6, 2009 some oil being blown out the rear cover vent is normal and is why they use'd the oil seperator on the vent system,, leaveing the stock venting system in place and working is the best way to do this,, air filters on the vent port is a bad idea and asking for a mess durring boost conditions a lot of air is flowing out of that rear vent port,, and it's perfictly normal , it has to go some where or the pressure will blow out an oil seal some where ,,excessive blow by can be from a broken ring land on one or more pistons a leak down test will find these most of the time but not always Link to comment Share on other sites More sharing options...
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