tsi keeps killing turbos!!!

[insanedsm2403]

Ok so I have a 90 tsi awd.some of you may remember my post about a month ago asking why I may have smoked my new evo 3 16g.well I got another 16g,great condition,barely used,minimual shaft play.(also I took apart my blown 16g completely.although I am not an experienced turbo rebuilder,I see no blue shaft to indicate lack of oil,nor is there oil everywhere to indicate blown seals so I still have no clue why it died.chewed up compressor blades is all I found)now,I used new oil feed line,new a/n return line.I get plenty of oil out of the feed port.650 miles on the replacement 16g now and it has so much shaft play I give it a week of use left.now once again,could anyone give me any pointers as to why this may be happening?I ran this replacement at no more then 18psi?(current mods are in profile)compressor surge maybe?I'm out of ideas and can't keep replacing turbos every 1k miles.any help is greatly appreciated.

 

[insanedsm2403]

Yea it does.

I know my dodge mod bov had a little hole in the bottom, where it mates to the flange and I'm sure I covered it with rtv.however it does not leak on boost leak tests

 

[JEFFREYCASTGSX]

Yea it does.

I know my dodge mod bov had a little hole in the bottom, where it mates to the flange and I'm sure I covered it with rtv.however it does not leak on boost leak tests

Make sure that it can open under vaccuum.

 

[insanedsm2403]

How would I check if it opening under boost.sorry if I'm asking a lot of questions,but this is my first time diagnosing this type of problem.

How would I check if it opening under boost.sorry if I'm asking a lot of questions,but this is my first time diagnosing this type of problem.

 

[JEFFREYCASTGSX]

How would I check if it opening under boost.sorry if I'm asking a lot of questions,but this is my first time diagnosing this type of problem.

How would I check if it opening under boost.sorry if I'm asking a lot of questions,but this is my first time diagnosing this type of problem.

Vaccuum is what opens a bov, and to check if its opening UNDER vaccuum, hook a vaccuum pump to the nipple, apply a vaccuum to it, and push the diaghram, if its easy then your more than likely ok. If not your bov might be stuck or since you said its modded then that can also be the problem. Also try it with no vaccum, you should be able to push it open, but not with ease

 

[JusMX141]

The valve definitely needs to be open slightly during idle.

These guys who are tightening their adjustable valves to remain shut at idle so they can vent their BOV without the car choking out and stalling are defeating the purpose of having the valve in the first place and are definitely doing more harm than good.