February 11, 20205 yr Report post Posted 13 hours ago Hi I’ve been a member for a while but have never introduced myself and have generally been poaching tec info from this site. However the time has come to ask a question. i have a 1995 uk Impreza. Had the engine rebuilt 2.1 stroker etc. it then sat around after a respray for about ten years. Last year I finally got a running in map and all was good. I was about to upgrade turbo sports cat and it started smoking under boast so I had a look and the intake has oil in it so I’m now fitting a catch can. ive looked at a million threads but cant find a picture. I’ve taken some breathers off near under the turbo and expected to see the psv valve but it’s just a copper looking pipe coming out of the crank case. im probably about to get spanked for being a noob and posting in the wrong place! cheers Alex
February 11, 20205 yr Author Ok well every breather joint on the way to the intake has a small amount of oil around it. The intercooler and hoses has oil in it. From what I have read this is a breather problem which is common and I need to fit a catch can or my rings are gone which I hoping they’re not cos the engine has only done a few thousand miles.
February 11, 20205 yr As per your other post i would check out the oil seals on the turbo as i wouldn't think the rings would be away on a fresh built engine 👍
February 11, 20205 yr The pcv valve is directly below the throttle body on the inlet manifold, the other 2 oil breathers are on top of each cam cover . Just make sure of you disconnect the oe oil breather system, that you "bung " any un used pipe take offs ... ie the one that goes to the intake pipework and 1 of the outlets on the crank breather y pipe 😉 Excessive oil burning could be due to a turbo seal or rings , are you getting much pressure when you take off the oil filler cap when running? This might indicate blow by , combustion gasses getting past the rings ,leading to excess crankcase pressure and the oil burning
February 11, 20205 yr Author Cheers savage I’ll install the catch can as per your directions and then I’ll check the oil filler cap. I pretty sure there was no pressure there the last time I took the filler cap off when it was running but I need to get it back together to check it now
February 11, 20205 yr Author Oops what a noob psv is sticking out of the intake manifold under the throttle body cheers. so why don’t I want to blank this off?surely it’s still sending dirty gasses back into the heads?
February 11, 20205 yr Although it would make sense if it's a 1 way valve , Otherwise boost would blow out of the inlet into the crankcase . I'd imagine you'd need to block it off as I don't know what pressure it operates at and it might suck air into the manifold at idle vacuum. Tbh my pcv inlet manifold hole had been welded up before I fitted my can 😊
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