thewhitewarrior

is it a specialist job or can it be done at home, if so how hard are they to do, thanks phil.

T4YLOR 83

iTrader: (2)

what turbo is it mate?

thewhitewarrior

TDO6 25G it dont look like a bad job to do, just wondered if its a specialist job or can i get my hands on it, cheers phil.

T4YLOR 83

iTrader: (2)

aparently if your handy with a spanner its a fairly simple job or so i have heard

GreenDream

It's a definate no-no if you want the turbo to last. They need to be balanced once they have been re-built, and this can only be done on a specialist VSR (Vibration Sorting Rig) machine.

thewhitewarrior

would it still need to be balanced if it only has new seal and nothing else, remember it is a new turbo that had a scavenging pump making the oil pressure too hight that caused the seals to fail, its not through wear and tear of alot of thrash, just a thought.

GreenDream

Yes it still needs ballancing every time it comes apart. When the nut is tightened down on the compressor wheel, it can throw off the balance due to the mass of the nut not being exact on all sides. When the centre housing is built, it's balanced using a magnet as a sensor and will be balanced up to 150000 rpm. A tiny amount will be shaved off the nut or the comprssor wheel to get it to balance perfectly. Unless you could tighten the nut so it is in EXACTlY the same postion (to the nearest 1000th of a milimetre - which is impossible!!) it will be well out. An improperly balanced turbo WILL fail, and catastrophically!!! I have seen it way to many times before.

Just think about a new engine, when it's built all the rotating parts needs to be balanced to extremely fine tollerances, and they only rev to 10'000 rpm max. Now if a turbo revs to 150,000 rpm, just think how finely ballanced it needs to be. In fact, there is only one machine that is used within the turbocharger industry worldwide that is trusted to balance to such a fine degree, and it was createdand is sold the world over by my managing director (who helped design the fisrt commercially used rolls royce jet engine!!).

Please don't do it. Turbocharger re-manufacturers do not charge much to balance a turbo.

Peanuts

iTrader: (15)

if its an MHI unit then I call a certain amount of bull**** on the above.
Well, not necessarily bull**** but certainly a fair amount of scare mongering.

its a do-er, has been done by many, remember to mark as you go.

GreenDream

Fair comment, but i stopped working for them (a major turbo re-manufacturer) over 4 years ago so have nothing to gain from my advise, and still wouldn't advise it. Unless you have been in a position to see, and deal with turbo failuers, warranty claims and competition turbo's for WRC, GT, Formula Palmer Audi as well as uprated and stock units for every turbocharged vehicle out there, be vary careful on the advice you give. If the OP takes your advice and the result is a turbo failure, he may wish to have answers from you.

And please explain how MHI turbo's differ from other units, that makes them not need balancing, or less susceptible to damage than other turbo's? They are all the same internally, using the same materials, and have exactly the same building and balancing requirements.

172sport

iTrader: (6)

Ive seen a few built on the driveway last a lot longer than the so called specialists.

I'd take the risk.

Maybe its my cynical side in me but i have doubts whether the run of the mill refurbers would even bother or have the caperbility to balance any way....

thewhitewarrior

thanks for the very usefull and indepth replies, i never ment to cause any arguments, and both of you seem to be very passionatly about what you said, what i will do is take it to bits and look at it, (just for curiosity) and find the problem, that way i can advise people later, then take it to the turbo specialist down the road, for the re-assembly and balancing, thanks once again for the advise.
phil.