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Re: Turbo blowing oil (HELP!!)
[Re: SLOW67]
#1076091
09/16/11 10:19 PM
09/16/11 10:19 PM
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Joined: Jan 2005
Posts: 2,540 Milwaukee WI
TRENDZ
master
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master
Joined: Jan 2005
Posts: 2,540
Milwaukee WI
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A 180 degree fitting? As in "oil going in any direction but down?" You cant have any loops or sags in the return line. If the oil isn't going down hill all the time, it will backup like that. Correct the routing and you shouldn't have any problems. Continuing to use it that way will carbon up the seals on the turbine side though.
"use it 'till it breaks, replace as needed"
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Re: Turbo blowing oil (HELP!!)
[Re: 2k1AmberR/T]
#1076094
09/17/11 01:37 AM
09/17/11 01:37 AM
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Joined: Aug 2007
Posts: 475 HEMPSTEAD TX
CUUDAK
mopar
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mopar
Joined: Aug 2007
Posts: 475
HEMPSTEAD TX
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Geeez, here we go with the "Cheap" chinese thing again!! First question is, Did you put the oil restrictor in your feed line??? I purchased the fitting with the restictor cast in it. Your turbo is probably getting too much oil pressure and pushing oil past the seals. As stated above, the oil return must have a straight shot to the oil pan....
SRT8 CHARGER "Four door bore" <img src="/ubbthreads/images/graemlins/smile.gif" alt="" />
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Re: Turbo blowing oil (HELP!!)
[Re: CUUDAK]
#1076098
09/17/11 09:21 AM
09/17/11 09:21 AM
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Joined: Nov 2006
Posts: 1,090 north cakalaky
instigator
super stock
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super stock
Joined: Nov 2006
Posts: 1,090
north cakalaky
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From the drawing you posted the oil drain is coming out of the side of the turbo instead of out the bottom....a very big problem if that is the case.
65 Barracuda All aluminum Indy HEMI with some boost! COMING TO A TRACK NEAR YOU!
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Re: Turbo blowing oil (HELP!!)
[Re: instigator]
#1076099
09/17/11 01:40 PM
09/17/11 01:40 PM
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Joined: Aug 2009
Posts: 14 Virginia
2k1AmberR/T
member
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member
Joined: Aug 2009
Posts: 14
Virginia
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Quote:
From the drawing you posted the oil drain is coming out of the side of the turbo instead of out the bottom....a very big problem if that is the case.
That's exactly what it looks like. You need to clock the center section 90* so the oil return shoots straight to the ground. You also need to just tap your oil pan (at the top) close to the turbo and shoot your oil return line straight down to the pan. Going across the whole engine horizontally like that isn't good either. Try to make the entire return line no less than 45* at any point, that way it is always traveling downward toward the pan no matter what. I'd suggest tapping the pan on the drivers side near the turbo. Sure it sucks to pull the engine and tap the pan...but it doesn't suck as much as ruining a turbo every 50 miles.
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Re: Turbo blowing oil (HELP!!)
[Re: SLOW67]
#1076100
09/18/11 01:50 AM
09/18/11 01:50 AM
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Joined: Jan 2003
Posts: 28,067 Irving, TX
feets
Senior Management
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Senior Management
Joined: Jan 2003
Posts: 28,067
Irving, TX
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Your turbo is probably fine, for now. Keep running it and it'll be carboned up.
Oil should enter through a restrictor. I run restrictors off Mazda RX-7s. Other guys shove .040" Holley jets in their lines.
There are no positive oil seals (like a wheel bearing seal) on a turbo. They spin waaaay too fast for that kind of thing. The drag from the seal would kill the response and once it did get up to speed the turbo would melt the seal. They spin more than 100,000 rpm in many installations.
Do you have any idea what happens to oil when it's sprayed on a shaft spinning 100,000 rpm? Foam happens. Think of shaving cream. How do you drain shaving cream? Quick answer: you don't.
The oil returns to the engine by the magic of gravity. Your feed line is a tiny little thing and the return is a big fat hose (1/2" minimum, 5/8" is great). For gravity to do it's job the hose has to be down hill all the way. If there's anything remotely close to a horizontal part of that line the shaving cream will sit there and not drain. it backs up the return line and makes a mess by finding leaks to escape or flooding the turbo. If it gets past those not-really-a-seal shaft seals your car will smoke like a Cheech and Chong movie.
One of my return lines got tweaked into a near horizontal position. The engine would pump out a smoke screen that would drift across an intersection until the oil was up to temperature.
Oil in is always restricted and always on top.
Oil out is always big and fat going downhill all the way.
If you can't reroute the oil line into a downhill position you have two options: 1) Put it into the oil pan ABOVE the level of the oil in the pan. 2) Install a small reservoir to catch the oil and a pump to push it out.
Live and learn. You've done pretty well so far. One little detail got past you. Fix it and move on.
We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind. - Stu Harmon
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Re: Turbo blowing oil (HELP!!)
[Re: feets]
#1076103
09/18/11 03:54 PM
09/18/11 03:54 PM
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Joined: Nov 2006
Posts: 2,255 IL
furious70
top fuel
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top fuel
Joined: Nov 2006
Posts: 2,255
IL
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from what I've seen on tmf, the prevailing thought now is to try no restrictors and only if you smoke put them in. I did not put them in mine, though I do have the fittings should I need them.
70 Sport Fury 68 Charger 69 Coronet 72 RR
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