sts turbo oil leak
sts turbo oil leak i just got my turbo up and running its an sts rear mount with the gt67 upgrade and a 2 stage boost controller and a meth kit.i gave it a few good pulls and noticed an oil leak up by the intake manifold i checked the pcv switch to see if it was backwards but it was all good any ideas???????????
Are you sure it's not your rear main seal? If its not that, you have an oil pressure sensor in the top of the block behind the manifold that may be loose, those are my only guesses otherwise. That or your getting a lot of blowby and somehow it's seeping out of the rear of your PVC system behind your manifold, but that seems like a long shot.
TECH Addict
Joined: Nov 2001
Posts: 2,659
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From: Bellevue, Wa
you know I have the same darn thing.
I thought it was my rear main, nope, then thought it was a valve cover (found the rear most bolt loose), nope, now putting it back together, noticed where my pcv valve connects to the hose it's very loose and it's a bit oily there so was gonna try clamping that up and see what happens.
I will check the rear of my intake and see if I feel/see oil there.
Post up if you find out anything else, I will be sure to do the same.
I thought it was my rear main, nope, then thought it was a valve cover (found the rear most bolt loose), nope, now putting it back together, noticed where my pcv valve connects to the hose it's very loose and it's a bit oily there so was gonna try clamping that up and see what happens.
I will check the rear of my intake and see if I feel/see oil there.
Post up if you find out anything else, I will be sure to do the same.
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Verdad Gallardo you'd have to be getting a shitload of blow-by for the oil the actually spray out of the back like that... If you were getting that much oil in your PCV system it would come out of the back PCV piping first on the back of the drivers side valvecover. Rear Main Seal, Rear Cover, Oil Pressure Sensor... those are all that make sense where you're describing.
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Joined: Nov 2001
Posts: 2,659
Likes: 1
From: Bellevue, Wa
hmmm I am thinking more people may have this problem than are aware of it. Looking like sts's pcv solution may not work very well.
It is very interesting though as it doesnt seem to pressurize the crankcase, cause nobody blows the dipstick out or anything like that. It just appears to pressurize that valve cover.
Another car just yesterday had the oil coming back up the oil cap as soon as it went into boost. They ditched the STS pcv stuff and effectively ran a breather and everything was fine. I think the big mistake STS is making is leaving the line connected to the TB. I need to take a good look at what they are doing. I must admit I just blindly followed their instructions. Should have not been so lazy.
I am going back to the way I had my pcv system with my blowers and ditch the sts gizmo. I never any problems with my old method, just had to use a catch can to catch the oil vapors. I must say with the STS pcv setup, there has been ZERO oil in the intake track, but this leak out of the valve cover (at least thats where it seems to be comming from) is not a good thing.
Not going to risk it trying to make their method work.
Should take my own advice and not fix what isn't broken.
It is very interesting though as it doesnt seem to pressurize the crankcase, cause nobody blows the dipstick out or anything like that. It just appears to pressurize that valve cover.
Another car just yesterday had the oil coming back up the oil cap as soon as it went into boost. They ditched the STS pcv stuff and effectively ran a breather and everything was fine. I think the big mistake STS is making is leaving the line connected to the TB. I need to take a good look at what they are doing. I must admit I just blindly followed their instructions. Should have not been so lazy.
I am going back to the way I had my pcv system with my blowers and ditch the sts gizmo. I never any problems with my old method, just had to use a catch can to catch the oil vapors. I must say with the STS pcv setup, there has been ZERO oil in the intake track, but this leak out of the valve cover (at least thats where it seems to be comming from) is not a good thing.
Not going to risk it trying to make their method work.
Should take my own advice and not fix what isn't broken.
Last edited by Blackbird; Jul 29, 2005 at 10:40 AM.
If it's coming from under the manifold in the back, it is probably oil passing the by knock sensor o-rings. The same thing happened to me. Make sure your check valve is working. It sounds like you've got some pressure building up.
I had this same oil leak issue. It turned out to be the valley cover gasket. I just pulled the valley cover off and used "right stuff" rtv to seal everything. The other possibility is the oil sending unit. I'll bet it's the valley cover though.
Originally Posted by Blackbird
so Zombie do you have the pcv configured they way STS instructs or do you have it done differently?
Originally Posted by myws6istheshiznit
thanks for all the input guys ill let you know what i find
I have the same problem in my STS, but look this, I think that the trouble is in the Cam Sensor "O-Ring". But I don't know what can be the cause of the problem
