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HELP! Three blown 14b's in 500 miles!!!!

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Sk8er07999

20+ Year Contributor
600
0
Oct 30, 2003
Denver, Colorado
Ok, I bought the car with the 14b on it and it ran great for a few months. Had one track day it was fine then that night I went out and messed around with a mustang on the street and thats when it blew. This one had tons of shaft play(like half an inch) and just smoked like crazy. So I got another one from a friend for 100 bucks off his parts car. We put it on and it lasts about an hour and then blows again while we are out messing around. Well I took it off and looked at it and this one just completely self distructed. The bolt that holds on the compressor wheel was laying in the intake pipe. The turbine wheel was stuck in O2 housingand the shaft was sheared completely off the back of the turbine wheel. The shaft or the bearing must have flown out and hit the O2 sensor because it's all bashed up. I found the bearing in my muffler but the shaft is missing. So this turbo I don't know maybe the bolt on the compressor just backed off some how and led to the complete distruction of the rest of the turbo. Well now I am on to the third 14b. This one lasted alot longer then the second one. I put about 100 miles on it in one day and it was boosting fine all day long and pulled hard. Well this time I went to launch off a light and it pulled really hard then at about 5k I heard a pop. I though I might have blown an intercooler pipe of but nope nothin. I took off the intake pipe and the turbo does not spin unless you rev it up. Yet it spins freely with your fingers and has NO shaft play nor does it smoke at all. But I think I found pieces of what might be the turbine wheel fins in my exhaust! What the hell is cause this! Could it be compressor surge! My Type-s is too tight and it does make the flutter sound like compressor surge does but would that causet this problem. Also, it can't be a restriction in the oil feed line because I have used a different one all three times. I inspected the coolant feed/return line too and oil drain line and there is no clogs I even cleaned them all up before the third install and it still F'd up! What's the deal! Any help you guys may have would be great. Thanks in advance, Kevin. Oh yeah and the 1st turbo was ran at 18 psi. 2nd was ran at about 15 maybe lower when it self destructed, and the third was ran at around 20 for a very short time when it just stopped working.
 
Well guys I guess I should update. I got the oil feed line from turbogarage and it's been working great. Also got a new boost controller from SBR and a new OEM PCV valve from Mitsubishi. I haven't turned the boost past ~15-16 psi. but so far it's still going and pulling pretty well. I am not going to turn the boost up anymore for fear it will pop another turbo. So until I save the money for a real turbo I guess I will just have to be happy with 16 psi. :cry: Thanks for the help guys, Kevin.
 
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