i rebuilt my turbo.... installed it, drove it, no boost.... it just made a loud screaming/sewing machine noise.... so today i took the compressor/centre section apart from the exhaust housing, i spun it, it spun freely.... installed it back together, spun it... it spun freely... started the car.... no suction, or blow out.... i stuck my finger in to see if the shaft was moving, and it wasnt, i tried spinning it, thinking maybe its caught onto something, and it was about stiff....(not to tha point where i cannot sping it anymore) but it was deffinately no spinning freely... im guessing due to the exhaust gasses passing thought... but it was not spinnging.... now the turbo was working fine before the rebuild...except for the fact that it wwas spewing oil...alli changed where the bearings. and seals... what wiould cause this problem?

 

i rebuilt my turbo.... installed it, drove it, no boost.... it just made a loud screaming/sewing machine noise.... so today i took the compressor/centre section apart from the exhaust housing, i spun it, it spun freely.... installed it back together, spun it... it spun freely... started the car.... no suction, or blow out.... i stuck my finger in to see if the shaft was moving, I fukin started screaming cause the turbo ate my finger, now my turbo is fucked, im missing a finger, and im not sure what to do? Any idea's?

 

im not that stupid to stick it into the turbine, i carefully touched the sahft ... and btw thansk for the useless post.

 

Anytime.

 

 

My guess is you took the bolts all the way out (or out a large amount), then pounded the turbine housing off & managed to bend the shaft or a blade on the turbine. It may not bind 100%, but at 100k rpm, it would be making contact with the bearings.

It also sounds like you put it out of balance by taking it apart. If you go ask any old Volvo or Saab tech that delt with turbos, you'll find that its common for a out of balance turbo (from oil caked on turbine) to 'scream' due to the vibration caused from the shaft.

 

A friend of mine has a fucked up finger/nail, took off a 1/4" off his finger when someone started the Rx7 he was working on without warning him.

 

Come to think of it I think you're right. I love messing with 84-93 Saab 900T's and when I had my first one the goddamn turbo sounded like a semi truck turbo when it spooled and the Saab tech said my turbo was on its way out. That makes a lot of sense. Obviously not super out of balance enough to destroy itself, but enough that it's not happy. That "screaming" is your turbo saying, "OMFG I'm not happy right now!"