Turbo shaft play in TD04's

[M0R81U5]

One of my TD04s has some lateral movement in the shaft and not having much experience in this area, i know it is not great, but how much is too much play?

I can move it about 1mm maybe just by wiggling the nut on the end of the compressor wheel. The wheel itself doesn't foul on anything, it just wiggles.

PS: No wang jokes please

 

[Guest]

I would think 1 mm isn't too bad

 

[Kenneth]

I would ring up a turbo distributor and find out.

1mm of play might not seem like a lot but in something that normally has none, it is quite a bit.

 

[TME_Steve]

What Kenneth said, I'd check with a few people too, to see you get consistent answers....

 

[unclepaulie]

is it radial or axial play?

 

[VOLK]

I'm thinking lateral is translating to radial. So sideways rather than end to end.

After a bit of a search I found http://www.eng-tips.com/viewthread.cfm?qid=293681&page=4, which lead to this:

General tolerances - Sleeve bearings - (access the shaft from compressor air-in end) -> typical maximum shaft end play (thrust) (back and forth, not sideways) is 0.008"inch or 0.20 mm (play should NOT be noticeable using your fingertips). Shaft side play no more than 0.022" inch or 0.56 mm (very noticeable sideways movement using your fingertips).

Edit: goes without saying it all depends on the turbo bearing type etc. as to determining acceptable limits of play. More info in the first link.

 

[unclepaulie]

yup, from what i have read/experienced, axial play is not good. radial play (1mm or under) is ok. just dont boost the tits out of them

 

[pu-11-me]

PS: No wang jokes please

C'Mon Mick, with a title like that?

I'm gonna change it so people don't get the wrong idea lol

 

[king_panther]

PS: No wang jokes please

What have you got against Wang Chung?

 

[twisted32]

remember td04's are just a plain sleeve style bearing. This means a larger tolerance for oil flow. Once running with oil flow, radial movement will decrease.

 

[M0R81U5]

Thanks people, I was too lazy to do my own googling, so thanks Volk

It is lateral play that I'm referring to, I can't feel any 'thrust' play. The other TD04 I have is rock solid, can't feel any movement in the shaft at all. I've been quoted $850 for a full rebuild, which I don't really want to do since the turbo only cost me $300. I might take it somewhere and see how bad it is, I don't want to go to the effort of fitting it to have it munch itself in a month's time.

 

[VOLK]

Np man, after so many years in IT I've come to accept the fact I'm a glorified google monkey