Archangels

yep i know i already asked this before but i didnt get a straight answer.... or mabe i was just blind....

my quick stupid question is, when my turbo's warm/hot and in 1st gear ( rarely 2nd ), at about 4500rpm i'll hear the compressor wheel in my turbo hitting the housing ( 70% of the time ).... when i hear it i get off the gas and it's never there for more then a split second....

i have a turbo on the way but i was wondering if this is an immediate worry or if i can hold off for another 3weeks'ish....

i believe icemark said something about metel shavings that could find it's way into the engine and oil....

what do you guys think, the turbo's definitly going, just waiting on it's replacement....

staticguitar313

iTrader: (2)

eek, is this the stock hitachi? i hope your dont have any serious problems that FC is awesome

Chris Ng

does this sound occure when you are cruising at 4500rpm or taking it to 4500rpm lightly? or does this only occur when you launch hard from a standstill? have you actually confirmed that it is the turbo causing this noise? is it a high pitched squeel? .. have you checked not only the tenstion of your alternator belt, but also the condition it's in?

Archangels

ahh thats a good idea chris, well it's when it's warm and it squeals when i'm mildly on the gas giving it mabe half throttle, happens sometimes and others it doesent....

nah i got all the serious problems fixed, the previous owner didnt take that good care of it, but now it's running like a top except for this turbo ( probably ) quirt and a little oil leak....

but yeah, when it squeals it will stay squealing unless i get off the gas, even for a split second then get back on it, it wont squeal....

if all that makes sence....

Chris Ng

You are right, steve didn't really take too much care of the car. I belive that is the same turbo that was on the original motor that he blew.. it was overboosted quite a number of times, so it doesn't really surprise me that it's decided to die (Mind you, if that is in fact the original turbo, he was already having many problems with it before he sold the car) ..
As for doing damage to your motor in the condition it's in.. as you mentioned, it's possible that you're going to get a bit of fine metal going through your motor.. I would suspect that if any large peices of the compressor wheel break off, they won't make it through your intercooler to enter the motor.. however the fine metal shavings may cause some premature wear...

As a side note, regarding your Intercooler.. I was kind of harsh in my reponse.. but that is only because I belive you are getting charged a great deal of money when you can jsut as easily purchase yourself a greddy IC for much less.. the greddy IC will also grow with your car.. if you ever decide to go to a larger turbo in the future, the 2 1/4 and 2" pipeing will definitly not be optimal and have to replaced...

RETed

You sure it's not a belt slipping?
Are you running just a single belt for the water pump and alternator by remove the air pump?


-Ted

Archangels

a guy looked at my car and said my air pump is gone, yep single belt on the alternator aswell....

yeah chris your right, steve was saying how on this turbo in 3rd gear if he pinned it the tires would break loose, WAY over boosting the turbo for sure....

yeah i thought the piping was a little too small, they can make it larger for me, 2.5inches all around.... the intercooler is decent size aswell....

oh and i will want to run a BNR stage 3 on the car next spring.... they said the intercooler is capable of 500hp....

though i think the piping is way too small....

RETed

I think the "screeching" is the belt slipping.
Try this test...
Rev the car sitting in neutral - pop the hood and see if the noise is from the belt.
Hint, if you see lots of "black" dust around the water pump and alternator, the belt is slipping.


-Ted

Archangels

well i revved it once with the hood up and i'm pretty sure it was the turbo, unfortunately....

when it makes that squealing noise there's a little puff of smoke that comes out of the exhaust, i'm not sure what color, once it was white, the other time it was blue....

i think my turbo is nearing it's death bed, hahaha....

ilike2eatricers

Why dont you just pull the TID and check the turbo for shaft play and/or scarring on the housing?

Archangels

i'm 90% sure it's the turbo, it was over boosted and beat to ****....

i was just wondering if it's an immediate problem or if it can wait approx. 3weeks for the replacement turbo, with a BIG ported wastegate....

:P

slpin

iTrader: (9)

heheh, it goes guess work guess work guess work and then someone mentioned the most obvious, and best way to check to see if the turbos really gone....

Chris Ng

when you pull the TID off, you are only exposed to the inducer of the compressor wheel.. if the compressor wheel is actually contacting the compressor housing, it will most likely do it's damage to the exducer, which you will not be able to see without removing the housing itself.. which will require turbocharger removal..
so now the problem is not as obvious to diagnose...

Archangels

how much do you think porting the waste gate would run me?, and which shop would be able to do the work?...

Chris Ng

Why not just port the wastegate yourself? dremel or a drill and a carbide bit which you can purchase at canadian tire etc....

slpin

iTrader: (9)

cant you make the compressor touch the housing if its loose enough?