why did my barely used b16g just blow???

[insanedsm2403]

Hello everyone.I have a 90 tsi awd with basic mods wally 255,610cc inj,2g mas,full stock rebuild on motor with b/s removed,mitsu 4 layer mls,arp head stud,3 inch turbo back and so on bla bla.I have boost set at 18psi with turbo xs bc.of course the 16g never listens to this command and likes going into the 25psi area when the pressure is really put on by the right foot.now on to my turbo.it is barely used.put 2,500 miles on it then it sat for 3 years until about a month and a half ago slightly less then 1,500 miles so far when I swapped motor and turbo in.So I'm out tonight and after hitting normal operating temp I do a hard 3rd thru 4th pull slow down and do another one,3rd thru 4th.all is well I get to a stoplight maybe half mile down.I start driving and hear a loud really okward howling like a cayote I would say.my boost seemed delayed and not so strong.I got to my garage pull the intake pipe off and holy sh**!rediculous amount of shaft play.it absolutely needs a rebuild.oh and by the way I did a blt test maybe 500 niles ago and all still felt mint in regards to shaft play.my question is what the hell could have caused this disaster,so that I don't chew through another one so fast because this is my daily driver and this is unacceptable.any help,ideas,suggestions please let me know.I appreciate any help.oh before I go I never ported my oil housing for lower oil pressure but lets also think around that at maybe other causes.

 

[RED95]

Sounds like an oiling problem, lack of oil or contaminants/particles reached the turbo. Also check for a clogged oil return.

 

[lk82]

im thinking it could be just old seals,dirt,and number of other things.

 

[Lusion972]

what brand turbo is it?

 

[insanedsm2403]

The turbo is a mhi evo 3 16g.I changed my oil twice in less then 1,500 miles.

 

[fastmitsu18]

The two most common reasons for turbo failure are foreign object damage, or poor lubrication. IF you dont see any visual damage to the compressor and/or turbine, then your problem is very much likely to be a lack of lubrication which could be caused by bad seals, clogged lines, dirty oil/oil contamination, not enough oil pressure, too much oil pressure, etc.

Did you reuse the stock oil lines, or did you install new ones?
you should always replace the oil lines when you do a turbo swap to ensure proper lubrication.

And when you do use new lines you should line it with a bit of RTV. Unforunately sometimes people go over board witht he RTV and end up clogging the line.

David.

 

[insanedsm2403]

Actually no I reused my old oil and coolant lines didn't think it would be an issue.

 

[fastmitsu18]

That is most likely your cause of failure.

"Oil feed lines often become filled with carbon deposits that will damage your new turbo. Even a clean used one is a liability. In fact most aftermarket manufactures will not warranty a turbo that was installed with a used oil line."

That came directly out of the book: "How to build max performance Mitsubishi 4g63t engines"

I alway check this book when doing any tuning or swaps.

 

[insanedsm2403]

Really?!!this is bullsh**!all because of a stupid old oil line.how much are these things new anyway ten dollars?I had no idea such small details,or particals I should say can cause such a disaster.

 

[fastmitsu18]

they usually cost about $50 by themselves. The one I got came with my install kit that I bought from punishment racing.

check out the attached link, they have more info on causes of new turbo failures.

RRE Mitsubishi Turbo Warranty Info

 

[insanedsm2403]

Better then going through another turbo.now I was thinking too high oil pressure from not having balance shafts,but this idea hasn't come up yet.any thoughts on this since I never ported my oil relief valve I believe its called.

 

[EclipseTical]

Better then going through another turbo.now I was thinking too high oil pressure from not having balance shafts,but this idea hasn't come up yet.any thoughts on this since I never ported my oil relief valve I believe its called.

certainly possible. A lot of MHI turbos don't like to be fed from the OFH without a restrictor of some sort, especially with your balance shafts removed.

The pressure at the OFH can kill the seals in the turbo. There is a reason Mitsu engineers designed the 1G's with the feed at the head.

Good luck straightening out your turbo issue, unless its a T25 it sucks when they die.

 

[insanedsm2403]

I'm sorry I think you misunderstood my question.I'm feeding from the head with a stock used oil line.I have removed b/s.I have not ported my oil relief valve which I heard is important to keeping oil pressure at safe levels after doing a b/s removal.

 

[EclipseTical]

I'm sorry I think you misunderstood my question.I'm feeding from the head with a stock used oil line.I have removed b/s.I have not ported my oil relief valve which I heard is important to keeping oil pressure at safe levels after doing a b/s removal.

you're right.. too early and not enough coffee yet!

 

[roostinds]

looks like it is time to rebuild the thing and make sure you pick up a new oil line.

 

[JusMX141]

The only answer is to tear the turbo down and inspect. If you find metal everywhere, you have a much more serious problem that will destroy any turbo that you bolt on your engine until the problem is solved.

 

[insanedsm2403]

Any feed back on ebay td05 rebuild kits?

 

[zdravko_k2002]

yeah similar thing happened to my 16G it def sucks but you learn from your mistakes I guess

 

[JusMX141]

Any feed back on ebay td05 rebuild kits?

You'll want to buy your kit from a reputable turbo parts dealer on eBay, not a seller who has turbo rebuild kits and crafty birdhouses listed at the same time.

 

[dsmmikej]

too much oil pressure can be bad for your turbo. if you have more than 100psi of oil then the oil can be backed up through the oil drain and do some damage to your thrust bearing. That or debris caught between your turbo bearing is probably your problem. time for a rebuild.

 

[4pistons]

If you remove the oil feed like from the head and look where the 'tube' meets the 'banjo' you'll see it is VERY restricted. There's only a small hole. If that hole gets clogged, or varnishes over from sitting too long you could have a serious lubrication issue.

I've reused mine but made absolutely sure it was perfectly clean and not blocked at all. Soaked in the parts cleaner, sprayed brake clean through it, slid a wire up through the hole.

When reassembling do NOT use RTV anywhere on the feed line as even a TINY bit can clog that hole. I've always used a semi-synthetic oil to keep away from heat related burning and coking issues, too. My old 14B was like new even after 100k miles.

Rick - '91 GSX

 

[JusMX141]

too much oil pressure can be bad for your turbo. if you have more than 100psi of oil then the oil can be backed up through the oil drain and do some damage to your thrust bearing.

While too much pressure causes many turbos to fail, he's definitely not seeing excessive pressure using the head as the source and using the 1G oil supply line, which has a restrictor built into the banjo end at the turbo.

I vote oil contamination.

 

[insanedsm2403]

Yea that seems right that hole is tiny so high oil pressure wouldn't make it throught that tiny hole.besides my turbo died so fast and feels so bad with play that I'm now almost positive it was oil starved.I have a slightly used oil line and now have even less money left so I have no choice but to reuse my newer stock oil line.I didn't know how sensitive turbos where to contamination so I will now take evry precaution possible when reinstalling all parts.I will confess this motor sat with no valve cover for 3 months in my garage,hood up before I ran it.I just threw valve cover on oiled up and started her up.that on top of break in contamination could have done it.even though I changed oil three times in 1500 miles I guess it doesn't matter.live and learn is how it goes now to fix my mistake.any advice/precautions as I take on my first turbo rebuild?

 

[DSMtsi23]

foreign object damage, or poor lubrication. Clogged lines?

 

[JusMX141]

any advice/precautions as I take on my first turbo rebuild?

Take your time, don't rush anything, and follow informative guides by those who have rebuilt a turbo or 500:

http://www.dsmtuners.com/forums/art...303828-td05h-td06-turbo-rebuild-part-1-a.html
http://www.dsmtuners.com/forums/art...303829-td05h-td06-turbo-rebuild-part-2-a.html