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Cam is okay to use but Crank not so good

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6SENSE

Member
Joined
Jun 3, 2001
Messages
1,635
Met with machinist the other day to show him what I had. Left the block and TRW pistons (w/rods) with him but held on to the crank for now.
Just from looking at it he thinks that its going to probably take .030 to clean up the rod journals, because of that spun bearing damage on the #1. This is what I was worried about. I could see where one of the rolled fillets on that journal is close to being shaved flat at one spot. Most likely, the crank would wind up being a .030 (rods)/ .010 (mains).
I know .010/.010 would be ideal. I think that even .020/.020 would be alright. But .030/.010 ?? Gonna need some advice on that one. Im thinking I might need to look for another crank, what do you guys/gal think? Dont really want to steal the crank out of the stock block thats in my car now. Would rather keep that together to go in another car or possibly just as a complete back up.


Oh yeah, the 204/214 Speedpro cam checked out still good, so I guess it will be going back in.
 
I think someone posted that after .025,youve cut the rolled fillet away.Plus its a nono IMO to not cut it even like youre talking about.

I happen to have a standard rolled fillet crank thatll clean at 10/10 if youre interested:D
 
It won't hurt it to turn it to .030/.010...IF IT WILL CLEAN UP WITHOUT GETTING INTO THE PRESSURE ROLLED FILLET...Find out from the machinist how much it would be to set it up and try to machine just that one journal to clean it up...If it cleans up okay, and the rolled fillet is untouched, then have him finish it...You can cut them "uneven"(ie more on the rods than mains, or vice-versa)...

Not sure on this, BUT ask the machinist if that journal does clean up at .030, if it would be okay to just machine the others to .010...I'm not too sure on whether or not that is an accepted practice, but I personally don't think that it would be bad to do...Other than having to buy different size bearings...I also don't believe that it would affect the balance of the crank much either...

Doing it this way would also leave some life left in the crank, to where you could possibly go to .020 or even .030 on the other journals as long as the one .030 journal isn't damaged in the future...

JM .02
 
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