MY QUESTION IS DOES MICROPOLISHING A CRANK MESS UP THE OIL BEARING CLEARENES? IF SO DO YOU NEED OVER SIZED BEARINGS. I ALREADY PURCHASED STANDARD SIZE ACL BEARINGS AND I WAS WONDERING IF THE MICROPOLISIHNG WILL MESS UP THE OIL BEARING CLEARENCES. pLEASE HELP ASAP.

 

Micropolishing is just that, Polishing. Its so minimal that it shouldnt throw your clearances off. Bearing clearances wont change unless you were grind the crank.

 

thanks, thats what i thought. Some guy was saying in some thread that if you mico polish your crank it will totally through off your oil bearing clearence, but i guess he was wrong.

 

You'd really have to go long and hard at it to remove more than .0003" at a time off a single journal on a Honda crankshaft because they're hardened.

In fact, you're not supposed to take a lot out on a micropolish without a properly-constructed abrasive belt. It'll belly down the centerline of the journal because it takes more out of the middle than the outer edges (towards the fillets).

My experience with micropolishing is that after two micropolishes, the journals were about .0003" to .0004" smaller than before having them polished. I had to polish the journals twice because the first place didn't deburr the teardrop & chamfer they put on the oil feed holes.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by IN VTEC &raquo;</TD></TR><TR><TD CLASS="quote">You'd really have to go long and hard at it to remove more than .0003" at a time off a single journal on a Honda crankshaft because they're hardened.

In fact, you're not supposed to take a lot out on a micropolish without a properly-constructed abrasive belt. It'll belly down the centerline of the journal because it takes more out of the middle than the outer edges (towards the fillets).

My experience with micropolishing is that after two micropolishes, the journals were about .0003" to .0004" smaller than before having them polished. I had to polish the journals twice because the first place didn't deburr the teardrop & chamfer they put on the oil feed holes.</TD></TR></TABLE>

What about machining your rods for arp bolts? Can i still use acl std. bearings for the rods too?

 

You'll just have to measure after honing.

 

perfect
im going with acl . clearences are just what i wanted