just did a check on the good old hx35 today. still no end play but i think side play is getting bad? it moves a fair bit, doesnt hit the side when pushed all the way over but seems reaally close thing is there is hardly any clearance as it is so its hard to judge how bad it really is, but u can definitely feel the moving. is there a spec or way to measure the side-side play? thanks guys

ps it had no play of any kind 25000km ago when i bought it, but i guess its had a pretty hard life since i got it i felt the play in my bros 97 turbo and it had a little more side-side and some end play, but i dont wanna use that as my guide to keeping my engine safe lol

 

Radial play is normal. If it isn't contacting the sides, then it should be alright. Its hard to get a proper measurement on it, since the bearings are so close together, and the wheels are overhung so far, it'll exaggerate actual bearing clearance.

Axial play is easy to measure. When I rebuilt my S366 two years ago, it was about .025" before, and .004" after. My BB chargers have a bit more, .007" IIRC on my GT42.

 

I guess if the compressor wheel touches the housing u will know its outta spec lol thanks Tate

 

.001-.005 end (axial) play and .013-.020 radial.

 

What is the correct way to measure the radial play? feeler gauge between the wheel and housing?

 

I think the right way to do it is with a dial indicator with the compressor housing off.

 

 

Well said!

We all try with our fingers, but only the dial indicator can really tell you what's up.