evo 16g is done for....now lets find out what caused it so it doesn't happen again

[1993TalonTsiAWD]

So another sad story in the dsm chronicles. I just had problems with the transfer case or something locking up. Still not sure, it has stopped doing it. But a new problem happened. I was out testing the car and seeing how it was running. It was running VERY well. But that was to good to be true (we all know that with our cars). Before I knew it I had lost all boost,I mean the bov wasn't even working. I knew it wasn't good,but didn't know just how bad it was. Before it went out all together it kinda was like compressor surge were it kinda cut out and then back in,but not a enigne cut,but boost cut. Well I get around to pulling the intake and guess what...I try to turn the wheel and nothing, it's siezed very good. Im upset about the turbo, but really care more about what caused it then anything. Time for a upgrade even though this is my 3rd turbo (one 14b,1 evo gt, and this evo 16gmhi). I bought the turbo from ams and was installed by them about one year ago. It has around 12-14,000 miles on it. What could have caused it to die so early in life. I have a few ideas I would like input and your own also.

thanks Derek

It was boosting 18psi,no real big numbers here. The only problem was I think I had a few exhuast leak pre turbo. Could they cause this turbo to die in 3-6months,because I had some work done to it, and it will drop from 18psito 15psi. I did look at the manifold to head gasket and saw alot of black suit .(sp?) This would indicate a few if not more exhaust leaks. Also one of the bolts on the manifold always backs out. Could these two problems over time take my turbos life away?

The other thing I could think of was lack of oil to turbo. It has the stock line feeding it, but has a after market oil return, (that I hate to say it leaks,but not that much). It has the stock coolent lines and I always turbo time it.

The last idea would be that my crushed 1g bov isn't doing its job just right and I was getting compressor surge.

I plan to get pics later on, but the cars in IOWA and Im stuck in IL at school. Im also going through withdraws as I went from my 12sec dsm to my 20sec VW wagon 1.8t (which that turbo really does nothing for that engine).

DSMs are like crack I need my fix. So please help

thanks Derek

 

[brute]

Well an exhaust leak couldn't cause a turbo going out, at least not in this way. The exhaust leak would effect your o2 sensor readings, but nothing to the turbo.

You are on the right track thinking about oil. That'd be my first guess. Compressor surge causes the wheel to get off balance, and over time, the balance will get exponentially worse until the wheels hit their respective housings. It would ruin the blades, but not cause a seizure. Seizures are caused by lack of lubrication. I'd check the oil feed line for any type of clog or something like that. Also check your engine's oil level. Maybe you were running wihout oil just long enough to seize the turbo's bearing. Just check everything related to the turbo's oil system.

 

[Caithness]

Friend's car killed two 14bs in two months. Switched it to a stainless oil feed from the filter housing and a stainless return and the 16g has lasted almost a year so far. Head oil feed is at the end of the oil supply chain, and subject to contamination and pressure drops in old engines.

 

[1993TalonTsiAWD]

Friend's car killed two 14bs in two months. Switched it to a stainless oil feed from the filter housing and a stainless return and the 16g has lasted almost a year so far. Head oil feed is at the end of the oil supply chain, and subject to contamination and pressure drops in old engines.

I forgot some info that may help.

the engine has maybe 14,000, also built by ams
it has
ross pistions eagle rods
arp...etc, but it does have the balance shafts removed,now I was told and have read that the mistu bearings aren't as weak to debris in the oil. I mean yes debris will kill anything,but they are suppsed to be stronger than a ball bearing item. also I was talking about a exhuast leak so bad that it caused the turbo to work twice maybe three times as hard to get to that 18psi.

Also how often do the stock feed lines fail, I have herd of really none. I also change my oil at maximum 2500 miles. what other problems could there be, the engine itself seems very healthy. I run 10w-40 right now, and it does use a bit of oil, sometimes 1 quart per oil change. I was also told this is normal. I just want to figure out what happen so I can stop that from my future turbo.

thanks Derek

 

[Denji]

How often do oil feed lines fail?
Well, I would say half the time cars turbos fail, but people can debate this all day. Lets just say there is a very good reason that warranties on turbos arent valid unless the oil feed line is replaced when the new turbo is installed.

 

[1993TalonTsiAWD]

How often do oil feed lines fail?
Well, I would say half the time cars turbos fail, but people can debate this all day. Lets just say there is a very good reason that warranties on turbos arent valid unless the oil feed line is replaced when the new turbo is installed.

Yes I understand that well, thats more for your ball bearing turbos where they "need" that line to function because of the restriction bulit in the line.

Were talking about the bolt on king here, and I bet half to 3/4 just bolt it on. I would have bought new lines, turst me I would have, but the shop said they wern't needed so I didn't.

I don't cheap out I things,but even when you don't stuff still breaks

thats how it goes, to bad there wasn't a cure for dsms love hate relationship

thanks Derek

 

[Denji]

Yes I understand that well, thats more for your ball bearing turbos where they "need" that line to function because of the restriction bulit in the line.

Were talking about the bolt on king here, and I bet half to 3/4 just bolt it on. I would have bought new lines, turst me I would have, but the shop said they wern't needed so I didn't.

I don't cheap out I things,but even when you don't stuff still breaks

thats how it goes, to bad there wasn't a cure for dsms love hate relationship

thanks Derek

To reiterate, when i said fail, I didnt mean it just in the sense that oil feed lines clog completely and hence no longer operate to flow oil and therefore kill the turbo. There can also be coking in the oil feed line itself, which can break off when the oil line is being taken off, put on or just during normal use and cause bearing damage without full restricton of the line. I would consider this a more typical cause for turbo failure than full on blockage of the line.

We can only speculate on the death of the turbo unless you want to take it apart, which i would do if i were you. If you intend on trying to rebuild it yourself make sure you mark the lines on the compressor wheel, nut and shaft before dissasembling.