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-   -   radial shaft play in a new turbo (http://forums.tdiclub.com/showthread.php?t=253123)

tdibeliever July 19th, 2009 18:51

radial shaft play in a new turbo
 
Anybody know what would be acceptable radial play in a K03/K04 Hybrid turbo? It's only got 1500mi. on it and the car is using oil to the tune of a half quart in 750mi. There is quite a bit of oil pooling in the boost pipes.

diesel-dave July 19th, 2009 18:54

there has got to be enough play to allow oil to surround shaft

some oil is common in intake tract

are you idling long?

tdibeliever July 19th, 2009 19:01

Perhaps an hour off and on while sorting the car out in the garage. The 1500mi. were all highway. There's no in/out movement. The compressor wheel looks it's right on the verge of touching the housing if was pushed to one side.

dieseleux July 19th, 2009 19:18

Radial shaft play of K03 or K03/K04 are big compare to another turbo because bushing have only one point bearing versus two point for most turbo.
Compressor wheel touch housing... normal for this small KKK turbo.
I have this hybrid on my car last 130,000km and work good.
Axial play for brand new Garrett turbo are aprox 8 mil. (KKK are similar)



Dieseleux

diesel-dave July 19th, 2009 19:29

Quote:

Originally Posted by tdibeliever
Perhaps an hour off and on while sorting the car out in the garage. The 1500mi. were all highway. There's no in/out movement. The compressor wheel looks it's right on the verge of touching the housing if was pushed to one side.


time for a new turbo

dieseleux July 19th, 2009 20:37

http://pics.tdiclub.com/showphoto.ph...0&ppuser=52721

Video of radial play of my brand new K03/K04.

and photo...
http://pics.tdiclub.com/data/500/medium/k03_l.jpg
http://pics.tdiclub.com/data/500/medium/k03_i.jpg
http://pics.tdiclub.com/data/500/medium/k03_h.jpg
http://pics.tdiclub.com/data/500/medium/k03_c.jpg


Dieseleux

tdibeliever July 19th, 2009 21:52

Here's a pic and a short quicktime of it. I can only fit a .0015" feeler gauge between the wheel and the housing.

[IMG]http://pics.tdiclub.com/data/500/med...cture_0194.jpg[/IMG]

Ok, I can't figure out how to post the video, but they are in my member gallery.

Rub87 July 20th, 2009 01:46

Seems plenty, the stock K03 I removed from my AHU at 480.000km had less play and didn't use a drop of oil:confused:

dieseleux July 20th, 2009 06:29

Quote:

Originally Posted by tdibeliever
Here's a pic and a short quicktime of it. I can only fit a .0015" feeler gauge between the wheel and the housing.

Ok, I can't figure out how to post the video, but they are in my member gallery.

Just put link of video like me.

In this small turbo, compressor wheel center by centrifugal force.



Dieseleux

tdibeliever July 20th, 2009 08:40

http://pics.tdiclub.com/showphoto.ph...2&ppuser=14478

tdibeliever July 20th, 2009 09:51

I just got an Email back from Gpopshop. They say acceptable values are between .018"-.022" Mine measures up to .025" and with as little clearance as .0015".

diesel-dave July 20th, 2009 10:06

oh i thought you said it was touching or hitting the housing

with oil pressure it will float straight.

mojogoes July 20th, 2009 10:16

The Gt25bb i'm using gives similar play as the turbo in the video if not a tad more............the bigger the turbo the more play it will have.

The Shootist July 21st, 2009 07:36

tdibeliever,

That spec should be bearing clearance. At the end of the shaft it will be more, so your .025" is probably ok with that taken into account.

My 2256 had the same sort of play and when taken apart had absolutely zero signs of wear in the bearings. High oil volume floats the shaft in the center of the bearing, and will keep it centered until shaft rotation stops.

mojogoes July 21st, 2009 09:50

Quote:

Originally Posted by The Shootist
tdibeliever,

That spec should be bearing clearance. At the end of the shaft it will be more, so your .025" is probably ok with that taken into account.

My 2256 had the same sort of play and when taken apart had absolutely zero signs of wear in the bearings. High oil volume floats the shaft in the center of the bearing, and will keep it centered until shaft rotation stops.

Yeah can you say "tubo timer"


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