Situation: Got on it pretty hard in 3rd the other day, only to hear this shrill, ungodly metal on metal skreak coming out of the engine compartment. It happened one other time (only when on it hard) so at this point, I'm babying her around.

I think what happened is the turbine wheel has contacted the housing. I noticed when I was doing the conversion that it appeared the turbo had a good bit of shaft play. Not knowing how bad is bad and the fact I had a ton of other stuff to worry about with the truck I just left it.

So if it was the wheel contacting the housing - how long will it last before she shreds herself?

If I had to change out the turbo I would end up trying to find a good used HX35 for cheap ...

Mods: 1/8" timing bump, otherwise engine is all stock.

 

remove the intake piping and apply light thumb pressure to the shaft then rotate. if the wheel is indeed contacting the housing it is only a matter of time before something lets go. tick tick tick tick tick boom. i would address the problem before you have a bigger mess on your hands to clean up.

 

yep only way to find out is to pull the intake off and check it out. You should be able to tell pretty easy if there is scuff marks on the compressor housing or if the compressor wheel's fins are damaged. Don't worry I've been through one too, it would stick so it would boost fine sometimes then no boost at all and it made a weird noise like a boot was blown or something. Just check it out and see what you find, but don't keep driving it! thats just more chunks of metal going into your motor.

 

Don't have any choice about the driving it part, it's my only set of wheels right now.

 

If I were you I think I would start looking for a used replacement. Chances are the impeller has already trimmed itself and there is contact scarring in the housing. Good luck!

 

well maybe I'm smoking something ...

pulled the intake last night, I can't see any damage to the wheel nor can I find any scaring on the housing. It definitely has play (side to side) but I'm unable to push the wheel so that it makes contact with the housing.

 

turbo bark. Not great, but not horrible either.

 

You might have scaring on the Turbin side. I would yank it off and look at it if I wasn in your shoes my friend. Better to be busy all evening then out a engine cause you sent pieces of a turbo thru it. After all you dont wanna end up like this......http://www.youtube.com/watch?v=VQ2Iz...eature=related

 

screeching sound could be exhaust manifold gaskets or CAC hoses. squealing like a a blade of grass in your in your hands

 

hmmm that's an interesting thought. I really didn't know how tight to make he CAC clamps when I put the truck back together, maybe I just didn't go far enough ...

I know this is a serious situation, if it is the turbo starting to grenade, that's a whole lot of metal I don't want going through my engine if it were to explode.

 

if you cant make to compressor wheel touch the compressor housing and it spins freely i wouldn't concern yourself with the turbo.

tighten the clamps until you think you are going to break them LOL no. but seriously the tighter the better. if you have t bolts clamp (which you should) and they are the type with springs in them (which you should) then tighten them till the spring bottoms out. if you are running t bolt clamps without springs then just be careful not to pull the threads out. and if you are running gear clamps. toss them over your shoulder and get some t bolt clamps.

 

Are you sure you dont hae a broken motor mount, and you're hearing the fan hit the shroud?