How much play is normal?

[Mike]

How much play is normal for a turbo?

Ive got about 2-3mm left to right on both turbos ive got. And about 1-2mm in and out on one, 3-4mm in & out on the other.

There both Garrett T2's if that makes any difference.

[burgo]

****ed!!!

shouldnt be any play in and out

[R1CH]

****ed!!!

shouldnt be any play in and out

Absolute bollox !!

ALL turbos, even new ones have abit of play in and out (end float).

What Turbo is it ? If its a somethinh like a T2 / T3 that has a journal bearing then there apear to be a bit of play side to side as well, as it spins on a film of oil. If its a roller bearing turbo then it shouldn't have any side to side play.
You'll only be able to measure the end float with a dial guage really.

Edit: just read thee first post propperly !! if theres a few mm end float then thats a fair bit really, any idea on milage, did it burn any oil ??
If theres that much play then the wheels will have came in contact with the housings, remove them and see if theres any damage.

[burgo]

ive never had a turbo with any in and out play other than knackered ones

[R1CH]

Granted it'll only be like 0.01 / 0.02 but ALL Turbos will have a very small amount of play, trust me !!

[Philsutton]

yes they will all have a play in an out, its the play in the other axis you really dont want.

[burgo]

Granted it'll only be like 0.01 / 0.02 but ALL Turbos will have a very small amount of play, trust me !!ok but still 3-4mm is ****ed!!

[R1CH]

ok but still 3-4mm is ****ed!!

Oh aye, i'll be very suprised if they have over 1mm play to be honest, if they do then both wheels will definatly have came into contact with the housings, pretty much making them scrap.
As said, the only way to check is to use a dial guage to measure it.

[Mike]

Right, stripped one of the T2's to bits today and found the following...

Doesnt appear to be any score marks etc
http://i80.photobucket.com/albums/j181/mikenova/TWOC%20Rebuild/194.jpg

Good?? Bad??
http://i80.photobucket.com/albums/j181/mikenova/TWOC%20Rebuild/195.jpg

?
http://i80.photobucket.com/albums/j181/mikenova/TWOC%20Rebuild/196.jpg

http://i80.photobucket.com/albums/j181/mikenova/TWOC%20Rebuild/197.jpg

http://i80.photobucket.com/albums/j181/mikenova/TWOC%20Rebuild/198.jpg

Muchos bad :(
http://i80.photobucket.com/albums/j181/mikenova/TWOC%20Rebuild/199.jpg

New thrust bearing is a must, new oil seals, new fecking everything lol

[burgo]

are you planning on re-building it yourself?? if so how are you gonna go about balancing it

[Mike]

Itll go to a turbo centre to be balanced Luke.

[burgo]

have you actually found a place that will balance it if you rebuild it? only reason i ask is a mate rebuilt a turbo but then everywhere he tried refused to balance it for him as the rebuild wasnt carried out by them

[R1CH]

Looks lovely, all you can do really is make sure everything is spotlessly clean and visually inspect everything.
Idealy you need to check its all still within tolerance but without and measurments to go off and without propper tools your gonna struggle.
Things that need checked are ... Condition of blades on the wheels, wear on the shaft, piston ring grooves, piston ring groove bore on the core and back plate, bore on the compressor wheel ect ...
If you had access to a (Bead) blast cabinet then that would help cleaning everything up (not the Compressor wheel).
Whats the condition of the blades like on the Compressor wheel ? edges of the blades look rounded off ? New one required if they are.
Its also best to balance both the shaft wheel and compressor wheel seperatly before building it up as well, but 'should' get away with it ?!?
Can't see why you'd have any probs getting the CHRA balanced really.

Rich