TwinTurbo93

Just few day's ago I rebuilded my turbos with a turbo city kit.
The first day I started my car maybe 1/2 hour after warm up they smoked a little, I turned on & off the car few times and the smoke dissapeared, drove aroud for and hour (not boosting) and no smoke, everything seemed OK.

Next day, warm-up, OK, no smoke, got in the highway drove for couple of minutes boosted to around 10 lbs nicely with no prob.

Next day, start the car and warm-up OK, just so I got in the street I saw lots of smoke again, alot more now, went around the block the street was filled with blue smoke, tried the on & off technique many times with no succes.

What the hell I did wrong or what couses this to happen, where does the oil go to couse these blue clouds.
I checked the IC piping and they where dry no oil, even the intake pipes where dry.

Any help would be very appreciated.
Thanks.

RX-007

how much was the kit, I need a rebuild soon.

TwinTurbo93

300 bones for both.

TwinTurbo93

Anyone?

jg937

my guess would be the seals, they must have failed, the seals on my turbos are leaking slightly and i will get some smoke every once in a while,nothing like what your car is doing.

TwinTurbo93

Thera are no seals inside turbo, there is only 2 brass barings that oil goes through which cannot go bad just like that, the one carbon seal does not have contact with oil.
The piont is what couses the turbo to fill with oil and spitt it out in the muffler?

clayne

Improper tolerances or clearances.

Did you plastigauge things?

TwinTurbo93

Improper tolerances or clearance, why is that? Everything went to it's place the way it should.
Turbo is factory balanced to 0.001 or less tolerance so that should be the last thing.

And what's plastiguage?

Thanks.

tonyttt

i have a set of twins 350 tonyttt@comcast.net

Zoomspeed

Little plastic strips you you squash down between parts. Then you can tell what the clearence is between those 2 parts by comparing how much the plastic has spread out with a little chart they give you.

AMRAAM4

Not sure what caused it, but you should have done more research on turbo city rebuild kits. I have read many people here atest to them being junk.

TwinTurbo93

Thanks Zoomspeed.

AMRAAM4, yeah I read alot about the T.City kit before getting them, but I thought I should give it try.

There is nothing to them anyway, there are 2 brass oil bearings that hold the shaft and fit perfectly like the genuine ones, thrust bearing and turbine seal few C clips and screws and thats it, so all that fit fine and simple.
All I'm afrad of is maybe some dirt got in the oil lines when I installed the turbo on the car or something.
I don't know, I'm freaking mad.

LT1-7

take the turbos off. Give the turbos some oil pressure and see where it is leaking from. Sounds like for sure they are your turbos so start there. While you have your turbos off check your exhaust ports for oil, could also be your engine's oil seals

TwinTurbo93

OK, that makes sense, well they will prob. be out mon. or tue.
I was trying to get some other ideas before I go ahead and take'em out, it's not an easy job.
I guess I have no choice.

I went out again today for a spin and they where smoking like ****'s, I wish I was in suburbs far from the city to try'em more to see if they stop smoking but not here, people here look at you like you're insane, and besides that, this place is polutted enough.

TwinTurbo93

wonder1and

I'm getting alot of blue smoke... but my oil metering pump is out! ... might wanna check that out!

Tim McCreary

If your shaft is worn, the new brass bearings will do no help. The tolerances between the brass journal and the shaft have to be very good to prevent the oil from seeping into the turbo intake or exhaust side. Also, the brass bearings, did they press in or just slide in? Could be leaking around the brass assembly into the turbo. Did you soak the bearings in oil prior to installing? The brass should be made of an oil bearing material (oil carrying material) which means there are microscopic passages for the oil to weep through to maintain the necessary oil film between the shaft and the bearing. It is the oil film that does the sealing of the turbo shaft and the oil system. If this oil film is not maintained, the shaft will touch the brass and wear it quickly.

Tim

P.S. Pull the intake and see if the oil is coming into the engine. If it is dry, then the oil is leaking into the exhaust side. Drop the downpipe or Cat and see if there is any oil running down inside the pipe.

TwinTurbo93

QUOTE]Originally posted by wonder1and
I'm getting alot of blue smoke... but my oil metering pump is out! ... might wanna check that out! [/QUOTE]
How can I check the OMP if is working or not?
Thanks wonder1and.

Thanks Tim.
The shaft seemed to have no lines on them (wear apearance) as for the oil brass bearings did have lines, they looked pretty worn out.
The new ones did not need to compress in, they sleed in nicely, I'd say not to tight (Iguess to alow a little oil passage) not to loose either, after comp. installation there was very little shaft play compare to before.

Before and after installation I did soake them with oil and kept oiling every piece by piece, also made sure to work in a very clean place and keep stuff clean.

I took off the intake pipes and the intercooler pipe to see if any oil got there and it was very dry, I guess the oil must of leaked in the turbine side not compressor side.
After warm up, looked at the turbo while the car is still running, at the primary side of turbo towards DP was smoking alitle.
So my guess is that the primary turbo is leaking in the turbine side which throws oil in the DP...
The litle C shape turbine seal is allowing oil through, and that is got to be caoused by something!

tonyttt

i have a set for 350.oo tonyttt@comcast.net

TwinTurbo93

With how many miles on?

wonder1and

I'm not sure... I've got a PFC which makes it simple... you'd have to ask around or look in the shop manual for test procedures.

spoolage

iTrader: (2)

Take your oil filler cap off compleatly and store it somwhere that it wont get lost. Try doing a drive w/ it off, see if it blows smoke. My car was smoking profusley recently due to a cap that I, my idiot self had put on a nipple that shouldnt have been capped and it was causing my oil system to pressurise, causing oil to be forced through the turbos after boosting, and it was resulting in a **** load of smoke any time i boosted.

Just try it, probably not the solution but who knows??

tonyttt

there have 24k on them turbos are good the worked prefect when they were taken off

spoolage

iTrader: (2)

relative of cletus the slack jawed yokle??

TwinTurbo93

I removed the PCV valve when I was doing the hoses and so on, so I capped the nipple.
After a day or so I thought that might have been the problem, (to much crankcase pressure) so I took of the nipple and the cap also but it did not do anything.
I was so happy thinking that was gonna resolve my problem, sadly enought it didn't do s**t!