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Old 07-09-2012, 06:36 PM   #1
Joe02wrx
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Default turbo oil return line blowing out air when boost leak testing

so this just recently started happening, theres a lot of air coming out of my turbo's oil return line when i am boost leak testing. it never used to happen and i can't think of any event that would cause this to happen. i have a Fp 68hta turbo thats pretty new less that 7k miles on it. SOMEBODY HELP i can't even boost leak test my car anymore because it escapes out of the line. i'm not sure if its effecting performance
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Old 07-09-2012, 08:10 PM   #2
KillerBMotorsport
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The oil seal isn't really a "seal" I'm really suprised to hear that you never head a leak out of it before. Maybe you just didn't hear it? Plug the drain & feed and continue your testing.
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Old 07-09-2012, 09:26 PM   #3
Joe02wrx
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When I tested it before my whole system held pressure until I unplugged my hose. Now it only holds for a few seconds. It's not a slight leak it's a massive one. This is normal?
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Old 07-09-2012, 09:26 PM   #4
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But thanks for the information I'll do what you said
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Old 07-10-2012, 02:00 AM   #5
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Wondering if I blew a seal
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Old 07-10-2012, 10:47 AM   #6
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If there's not excessive oil in either housing you're good. Remember, the oil seal isn't a real "seal". It's more a part/feature that prevents oil the oil from flowing where it shouldn't give the turbo orientation is maintained. When the seal wears you will have a symptom, almost always oil getting into areas it should not be.
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Old 07-10-2012, 11:46 AM   #7
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Alright I'll take off the turbo and check both housings
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Old 07-10-2012, 10:40 PM   #8
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No oil in either side
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Old 07-11-2012, 11:19 AM   #9
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Looks like the coolant and oil line on my turbo got bent into each other so the hose won't go all the way up it? Or are they normally touching?
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Old 09-12-2012, 04:50 PM   #10
Spunky424
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ever get this resolved? just got a call from my tuner saying i have the same boost leak from the oil return drain from the turbo.
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Old 11-12-2012, 04:19 PM   #11
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Bump, any update?
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Old 11-21-2012, 11:44 PM   #12
Joe02wrx
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Sorry didn't see the replies. I found out that only happens when you don't plug the crankcase breather hose that connects to your turbo inlet. Under other circumstances it would never see pressure. Just plug the crank case breather hose coming off the inlet
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