Fitting ATI Damper
#5
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Everyone I have talked to (including ATI) says the crank needs to be honed for the pulley. I bought a used built engine not too long ago that had an ATI damper on it... It has been sitting with the puller on it for several days on a very high tension... it won't come off. My mechanic says it is at the point where it will be broken if removed... The conclusion my mechanic and the machine shop we had who also tried to remove it, is that the crank was not honed for the install. Be careful!
#8
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Luke..... How do you "hone" a crank????
I know you can polish a crank, I know you can Grind a crank.
But to hone a crank is a new one on me.
But what I would take away is that ATI did not finish hone the ID of the balancer to have a proper press fit that is firm but not excessive.
THAT would be a fault on the part of ATI.
Thanks for the heads up, I will be sure to measure one before install.
I know you can polish a crank, I know you can Grind a crank.
But to hone a crank is a new one on me.
But what I would take away is that ATI did not finish hone the ID of the balancer to have a proper press fit that is firm but not excessive.
THAT would be a fault on the part of ATI.
Thanks for the heads up, I will be sure to measure one before install.
#10
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
Luke..... How do you "hone" a crank????
I know you can polish a crank, I know you can Grind a crank.
But to hone a crank is a new one on me.
But what I would take away is that ATI did not finish hone the ID of the balancer to have a proper press fit that is firm but not excessive.
THAT would be a fault on the part of ATI.
Thanks for the heads up, I will be sure to measure one before install.
I know you can polish a crank, I know you can Grind a crank.
But to hone a crank is a new one on me.
But what I would take away is that ATI did not finish hone the ID of the balancer to have a proper press fit that is firm but not excessive.
THAT would be a fault on the part of ATI.
Thanks for the heads up, I will be sure to measure one before install.
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#15
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It's supposed to fit tight - extremely tight. You need to make sure you get the right lubricant on there - I think my ATI damper came with a little single serve packet. It makes it a hell of a lot easier to install if you've got the correct tool with the ball bearing on it as well. I helped my builder remove it at one point, and then reinstall it. It was definitely tight, but nothing resembling "impossible"
#16
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
Luke..... How do you "hone" a crank????
I know you can polish a crank, I know you can Grind a crank.
But to hone a crank is a new one on me.
But what I would take away is that ATI did not finish hone the ID of the balancer to have a proper press fit that is firm but not excessive.
THAT would be a fault on the part of ATI.
Thanks for the heads up, I will be sure to measure one before install.
I know you can polish a crank, I know you can Grind a crank.
But to hone a crank is a new one on me.
But what I would take away is that ATI did not finish hone the ID of the balancer to have a proper press fit that is firm but not excessive.
THAT would be a fault on the part of ATI.
Thanks for the heads up, I will be sure to measure one before install.
IIRC it's the bore in the pulley you hone to match your crank to some kind of clearance.
#17
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the balancer hub has to be honed to spec, everyone had tolorances, so measure. i took a square key and ground it to fit flush in the bore of the balancer hub, and then used a hone to get it correct, use anti seize grease, and go to a local engine machine shop and see if you can barrow or rent there balancer installer. it has a thrust bearing that sits on the balancer so there is no binding or friction when you install, and its still not easy. they are very tight....... like a tiger
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