Quote:
Originally Posted by S12 Drifter
I wanted to say it SHOULD NOT have ANY in and out play AT ALL! all turbos have a bit of side to side and up/down play but in and out is a huge no no.
in and out means thrust washers are worn and needs to be replaced (thrust washer) just giving the buyer and seller a heads up.
good luck with sale.
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you are incorrect all ball bearing turbos if not all turbos have small minimal play.
if the play was more than minimal then there would be a problem, I think the most play it should have is .00051in
FROM GARRETT WEBSITE
*A. The Garrett full ball-bearing turbo is designed to have clearance between the bearing cartridge and center housing for hydrodynamic damping in addition to the internal clearances of the bearing cartridge itself. Hydrodynamic damping uses the incompressible properties of a liquid (oil in this case) and the space around the bearing cartridge to dampen the shaft motion of the rotating assembly. When the turbo is new, or has not operated for a long period of time allowing most of the oil to drain out, the rotating assembly will move more in the radial direction than a typical journal-bearing turbo because there is no oil in the center housing. This condition is normal. As long as the shaft wheel spins freely and the wheels don't contact their respective housings, the assembly will function properly.*
*Q. What is/causes Shaft Play?
A. Shaft play is caused by the bearings in the center section of the turbo wearing out over time. When a bearing is worn, shaft play, a side to side wiggling motion of the shaft occurs. This in turn causes the shaft to scrape against the inside of the turbo and often produces a high-pitched whine or whizzing noise. This is a potentially serious condition that can lead to internal damage or complete failure of the turbine wheel or the turbo itself.*