I'm propper fucked off. I bought a Garrett GT28R brand new from the States last year, i've done about 6,000 miles, but have been running it at quite high boost (18psi - which it can't hold at the redline).

It's started smoking on the over-run. There is about 1mm in and out play on it, no side to side. The compressor wheels are fine and so is the housing. How much am I looking at for a re-build?

 

could always DIY it

 

or send a pm to danny@radesigns on this board,....hes cheap as fook at the mo for rebuilds,.....will probably be a bit dearer when he goes international.....

 

diy a roller bearing turbo

 

exactly.....

 

if everyone had that attitude nobody would try and do anything themselves

 

yeah fair do's.....
i completely understand that,....but somethings are best left to people who know what they re doing,....

thing is,.....if he rebuilt it, ...wrong,.....and it went majorly tis up, hed be worse off, and more out of pocket for seal kit etc,....

however.....if he has a roller lying about that CAN be "broken by accident", then hes no worse off......get my point?

 

i've sent Danny a PM.

 

yeah i get your point but a lot of people deal with machinery etc at work, although it may not necessarily be a turbo theyre probably still more than capable of building one back up.

the same can be said about gearboxes, people always say fuck that theyre so complicated but theres one lad off here (sorry i forget his name) that rebuilt his own rs turbo box

 

Danny doesn't do roller bearing turbo's.

I think I read before that you have to buy a new core if the seals go. If thats the case, it'll probably cost near enough the price of the turbo.

 

How big is a GT28R then? my old T2 just struggled to hold 18psi and i can't imagine it's similar to that...and 18psi? wouldn't say that was high

 

i am quite sure you cant rebuild a roller bearing turbo it has to be a new core. probably more cost effective to scrap it and buy new.

 

i kinda thought that, but then thought "i'm a mechanical engineer, i must be able to do it" so i got a manual and a rebuild kit and a couple of days later had a like new cossie t5 gearbox. was properly satisfying

 

i'll have a go at anything, im multi skilled, mechanical and electrical, its so satisfying the end result when its DIY

 

You need equipment to balance it at 100 000 rpm. You got any ??


And in case of rallor bearing one it's core replacement anyway.

 

but a lot of people arnt......


hence him pm ing danny,.....turns out he s shit aswel....





i rest my case,.....

but that was your opening statement,....

oh, i thought it was a figure of speech,...i mean, case closed.....

 

It's .64 ar I think. I suppose it depends on what engine the turbo is on. I know the CA18 has a head that flows very well. If I was to maybe fit it onto a Renault 5 or something, it might be able to do higher boost pressures.

I'll be fookin pissed if it's dead.

Is 1mm in and out movement usually enough to mean the seals are fooked?

 

taking something to a 'expert' doesnt always guarantee you a good job will be done,only way to be sure is do it yourself,but thats not always possible in something as specialist as this.

 

in and outs pretty grim unfortunately.......

usually side to side tells you somets wrong.....


carl

 

What does side to side movement mean - oil seals? or something worse?

I think I just killed my T34 last night and have some side to side movement in the shaft (but no front to back movement). . .

 

Side to side means the bearings have gone and usually the whole turbo is fucked beyond a simple re-build

 

If side to side is bearings, is in and out seals?

 

The only ball bearing turbo that can be rebuilt is Turbonetics and I think only the company can do it.

 

If it moves side to side though usually the housings where the oil seals sit are worn aswell

 

my t34 had play in side to side and in and out - safe to say it was fooked. Previously when I have had these turbos rebuilt I have only paid £250 but this time it cost me £530 (£450 + VAT) due to the damage I had done.

Still its back better than before with a few special bits so it should last this time

 

not sure what you mean there,.....



any turbo can be rebuilt,......however,...99% of the gt series need the core replacing,

so,....if its in and out,, it is very slightly possible its the seals,..but as its a gt it will need a core anyhow,....
if its side to side, it is more than likely the seals have been run down or failed.....most of the time,......... sometimes its the bearings, but these get changed anyhow in a rebuild,....(on a normal turbo) but as yours is gt, it needs a core...

so,...your options are,....it needs a core,...or,.....it needs a core.....

however,....fo the guy in america, your cans be rebuilt no probs, and is more than likely the seals or beaings,..
and seals and bearings get replaced in standard rebuild anyway....

 

Sorry what i said only really applies to floating bearing turbo's

 

i have rebuilt 2 roller bearing turbo's used t3 shart's and ground down
to size .i had to get my own balancing machine to balance the shart's
had one on my 620ti t04e compresser and a . 86 turbine and had no
problem other than melting the tip of the turbine

the other roller bearing is a t34 with a 48 turbine to fit a cossy
but drain and oil feed is t28