lastphaseofthis

iTrader: (8)

so my engines coming in in a few weeks from kevin, i decided to fix my turbo problem, one turbo spins very freely, but has in and out shaft play(bad bearing?) the other has no shaft play at all, but is harder to turn, heres the hard to turn one:

-efini-

doesnt it need to be rebalanced once u take apart the center section?

Wankel7

Yikes, did the oil ever get changed?

James

lastphaseofthis

iTrader: (8)

i am guessing no, i bough the car and have put 4 miles on in in the last Year :P, the other turbo looks exactly the same under the hotside turbine bearing cover dome thingy.

yes it SHould be rebalanced, but this will only be put on for break in, and i am hoping if use the same shaft /hotside/compress turbines, and change out just the center and rear housing i should be O.K. but i dunno

Wankel7

Imagine how coked up that turbo would be if it wasn't water cooled also. Yikes

87_rocket

Didn't know they made cocaine forced injection systems...

Alex6969

wow i'm not a turbo guy (yet) but i don't think turbos are sapposed to look like that

Pinfield357

ya thats pretty bad

lastphaseofthis

iTrader: (8)

heres the REAL problem, them bearings are worn the **** out man!
so would the travel inward that the bad bearings allowed cause oil to come out the hotside? i am guessing so b/c its cover with oil.

Alex6969

wow i also didn't know a turbo had all of those little misc. parts in it

lastphaseofthis

iTrader: (8)

well its all back togather and spinning freely, does anyone know a way to messure the turning resistance, it almost feals free-er then before, but i know how the fealing measurement goes.

Digi7ech

iTrader: (1)

I would not trust your rebuild unless you marked the turbine placements so it will remain perfectly balanced.

You don't want an unbalanced shaft spinning at 100k rpm.

I recommend a local rebuilder which does mainly phone sales/rebuilds.
www.turbosdirect.com

They did an excellent rebuild on mine and the turn around was a day.

staticguitar313

iTrader: (2)

How much did they charge you?

Digi7ech

iTrader: (1)

They charged me $216-ish after tax for local pick up. They are less than a block from my house.

Slo Motorsports

Was that for the stock TII turbo?

NZConvertible

The turbo has to be rebalanced when any part of the rotating assembly is changed. If you reuse the wheels and shaft, and return everything to exactly the same relative position as before, it doesn't need to be rebalanced. If the relationship between the parts wasn't marked on them before disassembly, it'll need to be rebalanced or the bearings won't last long.

lastphaseofthis

iTrader: (8)

i know its bringing this thread back from the dead, but i put 6k miles on that turbo before swapping it out, and have the choice of using it again or one with MORE shaft play then it does(which still has the same as it did when it was "rebuilt")
on an unbalanced turbo should it have failed me sooner then 6k, or does it sound like i got lucky ?

The Wankler

iTrader: (14)

lucky!

classicauto

iTrader: (3)

Also depends on how hard it was pushed.

6,000miles isn't that far. If every single one of those miles was done at 13psi, then its quite a bit.

Also, un-balanced and un-verified are two different things. Not to mention the journal bearing turbo's will take a little in-balance much better then a BB

initial D is REAL!

The reason the oil seeps through that heat shield on the exhaust side is because of the piston ring looking seal that goes around the turbine shaft.

I dont know why, but my turbo balance was $25. The turbo shop balanced each part individually balanced, so it was unnecessary to have it marked in a certain location before assembley

NZConvertible

BS. The only way to balance a turbo is to balance the entire rotating assembly as one unit. Since the parts then need to be taken apart for assembly into the housing, there always needs to be alignment marks made.

initial D is REAL!

So its not good to balance the turbine and the compressor wheel and considering it balanced? I was told this by my turbo shop. Please inform me so i can bitch at them. lol. No wonder they didnt charge that much. Well, i saw them balance each part on some thing with lil belts. It spins teh wheel and tells them where the material needs to be taken off. Let me know

lastphaseofthis

iTrader: (8)

well yeah 6k hard miles

NZConvertible

Don't ever go there again (except maybe for a refund). You can't balance two pieces separately, join them together and expect them to be balanced. That's just crazy. The next time you buy tires, ask the installer to balance the wheel and tire separately before putting the tire on. Tell us what names he calls you...

initial D is REAL!

OK cool, thanks for the real info