End Float ?

[Jamie72]

hi all ,I recently purchased a hks gt2835 pro s of a SAU member,

ive noticed it has some side play which is a little more than i would like but seems like it would still be ok,

the thing i`m not too sure about is front to back movement.applying forward pressure to the turbine shaft then counter on the comp end i get (without

measuring properly) movement forward and back.enough to clearly see and feel..from what ive read the desired end float is zero,

so my question is ...Is there a ok amount of end float or is it likey in need of a rebuild ?

i dont have a dial guage or the like ,is there another way to measure it ? cheers.

[StealthX]

can you take a guess as to how much end to end movement?

My GT28 fresh from garrett had a tiny bit of end to end movement. It's to do with the ball bearing system...

[75coupe]

when I had this turbo check by a workshop they did say the movement I was worried about was normal for BB turbo and that once it had oil floating the bearings it would be fine....

they said I was worried about nothing and I took their word for it... it seems once I started searching BB turbos do have some movement in them...

[Jamie72]

hey cheers,I did consider oil pressure coming in to play,

but with my limited experience with turbos wanted to be sure b4 fitting it up,

"can you take a guess as to how much end to end movement?" At a guess not much more than 1mm or so,its hard to say though.

After what 75coupe said I feel much better about going ahead

Thanks guys for your help.

[WYTSKY]

my brand new garrett had .5 of a mm, had it off the car about a month ago (after about 10,000kms), still had .5mm... (or there about, something so small I can only just feel it when I push the blades in - think you'll find it will be quite normal )

[PM-R33]

Yep perfectely normal with a ball bearing turbo.

[89CAL]

When oil gets in the turbo it will take some of this out, my brand new HKS 2835 KAI had a bit of float, but all good, on the car now running 18psi

[Jamie72]

good to hear your replies thanks fellas.I`m convinced its all good.