DIY turbo rebuild
Turbo Mini Forums

Right, ive 90% stripped the T3 but im a bit stuck now as to what to do next. the exhaust turbine dont want to come off the shaft. any ideas? all that im left with, is the centre casting (which the oil feed though, and the exhaust turbine, with that cup shaped thing in between. there seems to be some funny triangular rounded angular funny shaped thing on the exhaust turbine end, but doesnt seem to want to turn. is this a nut?

HELP!

MM

Sooperdooperturbocooperexpertengineering!

you dont need to remove the eehaust turbine because once youve removed the compressor wheel, the shaft should just pull out with the exhaust turbine on the end from what i can remeber. if youve not removed the nut on the compressor wheel side hold the triangle nut on the exhaust bit(i fink a 14mm 6 sided socket does the job) and undo the little nut on the compressor wheel.
dont forget to mark their positions
if youve done the above and the shaft wont pull out perhaps it stuck in the bearings or seals or something like that
hope this is any help

Edited by Carl on 17th Jan, 2004.

no longer a series, but still 1.3 turbo.

The exh turbine does NOT come off the shaft, its friction welded on there!!! The triangle on the end is used for balancing the assembly, so any damage might effect the dynamic balance badly!

I assume you've undone the compressor nut... its best to use a 12-pointed socket on those with a t-bar handle so you aplly an even twisting force to the shaft. To hold it sill gentle clamp the triangle end in a vice but try to supprt the unit so its not hanging all that weight on there!

alex

AlexF

Got to admit i dont think i'd ever try rebuilding my own turbo. It must affect the balance by a huge amount. Also depends how bad the turbo was in the first place, was the compressor or turbine rubbing any of thre housings ???

Right, the compressor wheel is off, the shaft that end is bare, ive removed the bearing circlip, so the exhaust turbune and shaft should juts pull though yeh? havent been forcing anything, so hadnt really tried that. been real gentle with it.

bearings were buggered, although it turned free enough, you could get it to rub if you held it one side. ive checked for wear and rubs on both rotors, and both seem fine.

ive been marking absolutley everything, even nuts and bolts!

got the 12 pointed nut off using a good quality socket, and had one of those Gator grip sockets on the triangular end, so as not to damage it in any way.

will give it a gentle tap with my ally bar, see what happens.

MM

Sooperdooperturbocooperexpertengineering!

it should just pull through...

when its out what ur looking for is ware on the shaft. It should be utterly smooth, but expect to find ridges!

The other thing to look at is how much damage there is to the comp and turbine wheels.

Did you mark the position of the compressor wheel to the shaft so its goes back together the same as before?

If not your going to have to get the whole lot balanced again, or just risk it. But that depends on what you find inside I guess!!

alex

AlexF

see above post,

'ive been marking absolutley everything, even nuts and bolts! '

will see if it comes out!!

comp and turbine wheels all seem pukka!

Sooperdooperturbocooperexpertengineering!

good good

lets see some pics!

alex

AlexF

i know this is an old post, but thought why start a new one...

i cant for the life of me get the turbine of the shaft. i cant even undo the nut. someone on here said its a reverse thread, so i have been turning it right, this is correct yeah? also whats is the best way to keep the hole thing from turning as its got the stupid triangular nut at the other end? i have tried a vice with wood, i have tried just the vice, still no luck.

help!!

its a t2 by the way if that helps

The "stupid triangular nut" at the other end isn't a nut, well not on the T3s anyway.

I would guess the T2s are the same.

It isn't a nut - I learnt this the hard way - the turbine shaft/wheel are all one part, the "triangle" is just the bits removed for balancing.

If you put that bit in a vice you may screw the balance up.

The nut at the other end is usually (on a T3) RH but some are LH - it's usually obvious as there will be a couple of threads on show.

I just put a load of rag around the compressor wheel and use an impact gun which spins it off instantly if you have the correct RH/LH sorted.

Schrödinger's cat - so which one am I ???

Full marks for searching an old thread.

Nil pois for reading said thread.

In the 13's at last!.. Just

theoneeyeddizaed: i did read the whole thread, and know the triangle "nut" is not an actual nut. what i ment was the best way to hold the triangular thing to keep it from spining. but took the advice above and used a sixpoint socket which worked a treat and got it undone already.

now the next problem. i cant get the compressor of the shaft, after removing the nut is there something else i need to do?shouldn't it all just come apart now? is it ok to use a bit of persuasion in terms of a hammer?

Edited by c2_mad on 12th May, 2012.

Whatever you do dont use a hammer !

The compressor wheel should just lift off.

If it doesn,t and you bend any of the blades then you will have lost the balance.

got a puller on there and finally got it moved...

now i just need to get some tiny circlip pliers...

Schrödinger's cat - so which one am I ???

for a stuborn impellor, application of a little heat will allow the impellor to just lift off.

i used a small puller hooked on the backplate to push the shaft out towards the turbine end,as suggested by kean on his guide to rebuilding the turbo i dont see what could be bent, the shaft? did you maybe think i hooked the puller to the compressor wheel itself and bent that??

there is absolutly no way it would have come off normally

Edited by c2_mad on 12th May, 2012.

there was a step by step guide i used from another forum, sure they do one for the t2 as well.

there might be a link in my build thread

also dont those nuts thread the wrong way, i recall someone snapping a gt17

(sorry if this dont make sence, its 5am)