Newly installed turbos leaking lots of oil ☹️

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Old Dec 11, 2022 | 09:45 PM
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Newly installed turbos leaking lots of oil ☹️

So frustrating. Just got car back with new Pure 900 turbos installed and fresh ECC tune. car runs amazing ! Installer checked for leaks. I drove it a bunch the next day. I got on it a lot. no issues other than traction even from a 75 mph roll in 55 degree air. 😎. no oil on garage floor. took in to have oil change. my guy rechecked under the car and even took turbo cover off and reinspected for any signs of leaks.

So the next day i drove three hours to Thunder hill For two track days. Car drove fine. Let my friend and pro driver take it out first cold session to see how the new setup feel. He makes 3 turns taking it easy and sees smoke pit back and TC is flashing cutting power 🤯

Pulls in to pits and gets extinguisher just in case. He knows some guys there and they put up on a lift and this is what they found. Ughh. They could see it was def coming from turbo somewhere. So bummed. I used all new factory gaskets and O rings. $250 worth. Mechanic hasn’t looked at it yet. just got home. He mentioned the feed lines were thin flexible lines. Said they almost seemed like one time use kind of thing. Maybe they are 🤷‍♂️

We are assuming the Check engine was due to oil starvation on turbo. will scan for stored codes to confirm. went away as soon as he stopped the car.

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Old Dec 11, 2022 | 11:13 PM
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That’s unfortunate. Keep us posted on what happened. My first thought was you did t replace with new o-rings and gaskets but then you mention that you did.
Maybe a line wasn’t tightened properly?
Hope it’s not something wrong with the turbo itself.
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Old Dec 12, 2022 | 12:03 AM
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Originally Posted by LTHL VPR
That’s unfortunate. Keep us posted on what happened. My first thought was you did t replace with new o-rings and gaskets but then you mention that you did.
Maybe a line wasn’t tightened properly?
Hope it’s not something wrong with the turbo itself.
I had read about doing new orings etc right before he was putting them back in and luckily dealer had them in stock.

I doubt it’s turbos. almost certain it’s a fitting.

wont know for atleast a few days

Lucky it didn’t catch fire.
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Old Dec 12, 2022 | 06:59 AM
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Originally Posted by dllhg
I had read about doing new orings etc right before he was putting them back in and luckily dealer had them in stock.

I doubt it’s turbos. almost certain it’s a fitting.

wont know for atleast a few days

Lucky it didn’t catch fire.
Sorry to hear, somebody screwed up on your installation. I have done a few without any problems. > https://mbworld.org/forums/coupe-roa...ved-today.html

Before you pull things apart - look up in the EPC for all the tubing connecting points (so you have an idea where to look first) - i.o.w where each one of the o-rings are located - check all the flexible sections of the tubing if they have pulled on them taking the tubes out they may have gotten ruptured inside.

Best H
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Old Dec 12, 2022 | 10:46 AM
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Originally Posted by Hendrik Koster
Sorry to hear, somebody screwed up on your installation. I have done a few without any problems. > https://mbworld.org/forums/coupe-roa...ved-today.html

Before you pull things apart - look up in the EPC for all the tubing connecting points (so you have an idea where to look first) - i.o.w where each one of the o-rings are located - check all the flexible sections of the tubing if they have pulled on them taking the tubes out they may have gotten ruptured inside.

Best H
thank you.

So the tubing is a likely suspect you think ? How are tubes removed if you cant pull them ? so you happen to know part numbers for those and how many ? I might just order them from dealer and have them ready in case that’s it.

What’s odd is there were no leaks initially and after a day of driving it pretty hard. was after 200 mile drive to track. didn’t even drive on track enough to matter. 2-3 turns.

Last edited by dllhg; Dec 12, 2022 at 10:58 AM.
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Old Dec 12, 2022 | 02:28 PM
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Originally Posted by dllhg
... What’s odd is there were no leaks initially and after a day of driving it pretty hard. was after 200 mile drive to track. didn’t even drive on track enough to matter. 2-3 turns.
So, could "higher-G turns" be the thing that's different?
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Old Dec 12, 2022 | 02:49 PM
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Originally Posted by user33
So, could "higher-G turns" be the thing that's different?

Possibly 🤷‍♂️. He only did 2-3 turns though.

Also i went on back road afterwards and romped on it a few hard pulls and started smoking badly again. I think when the turbos get hot and or build pressure it just starts leaking badly.
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Old Dec 12, 2022 | 05:13 PM
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Has to be an installation issue, unless the core re-build is suspect. Going around corners and pulling a high 'G' at speed should not cause anything to surge or leak past a seal. If it does then return them.
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Old Dec 12, 2022 | 06:11 PM
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Originally Posted by thebishman
Has to be an installation issue, unless the core re-build is suspect. Going around corners and pulling a high 'G' at speed should not cause anything to surge or leak past a seal. If it does then return them.
most likely culprit for sure. Mechanic suspects the thin tubed feed lines. said they were flimsy. i replaced all the seals orings gaskets etc. is there a way to screw up swapping orings ?
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Old Dec 12, 2022 | 07:48 PM
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If the oil is IN the exhaust causing the smoke to come out the tailpipes it’s a turbo issue. That would likely be the internal shaft seals in the housing. This is common on new turbos that were not primed properly (ie run dry), insufficient or starved oil supply , improper assembly/rebuild or could be from blocked drain lines. I have seen all of them happen but being that these are on a properly engineered OEM turbo oiling system unless the install got botched likely either dry started or rebuild seal issue. Now if the smoke is just from oil getting ON the exhaust I’d suspect the drain tube or o-rings got compromised. Good luck getting it sorted.
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Old Dec 12, 2022 | 08:41 PM
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Originally Posted by dowheelies
If the oil is IN the exhaust causing the smoke to come out the tailpipes it’s a turbo issue. That would likely be the internal shaft seals in the housing. This is common on new turbos that were not primed properly (ie run dry), insufficient or starved oil supply , improper assembly/rebuild or could be from blocked drain lines. I have seen all of them happen but being that these are on a properly engineered OEM turbo oiling system unless the install got botched likely either dry started or rebuild seal issue. Now if the smoke is just from oil getting ON the exhaust I’d suspect the drain tube or o-rings got compromised. Good luck getting it sorted.
Its oil on the exhaust causing smoke. Can see the oil underneath. New orings but possible one failed or maybe put in wrong ?
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Old Dec 14, 2022 | 10:57 PM
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update on the car. My mechanic stopped by the house just now took the covers off and took a look. It’s one of the two thin aluminum flexible lines at the bottom. I believe it’s the return lines. Hard to tell but he thought it look like it might have a crack. It’s a really poor design for trying to reuse. He said he’s confident getting a new one in. I think I’m going to just give him a chance to take care of it.
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Old Dec 15, 2022 | 11:26 PM
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here new return lines. So apparently it’s not uncommon for factory ones to leak. they even upgraded them where the issue was. you can see the green band. that’s new



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Old Dec 15, 2022 | 11:51 PM
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Do you have pictures of old return lines as reference?
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Old Dec 16, 2022 | 12:06 PM
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Originally Posted by AMG 17GT
Do you have pictures of old return lines as reference?

not yet. being pulled tomorrow. will keep thread updated
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