Isx 600 bearing issue

Replace the engine. Metal gets everywhere after a spun main. Block is likely damaged. If you rebuild it, can you 110% guarantee you got all the metal out? No. Replace the engine.

 

What oil and filter are you using? Is it possible it could be over heating? Worst case, change out the rod bearings every 100k miles. Don't worry about metal, you have filters to catch it. If it's not in the pick up tube, it's in the pan. See if the crank is salvageable, maybe just try and replace the rod bearings on that cylinder. You have nothing to lose.

 

Rod bearing in these engines seem to be a issue when running high HP, I keep hearing this same problem. Or is it just a bad batch that got thru quaility control

 

We've had some rod bearings let go and really didn't damage the journal too bad. We polished it up and installed new bearings. Not the greatest way to fix it, but sometimes you can get lucky.

 

Yes, that is what I was suggesting to the OP. He has nothing to lose.

 

that many different spun bearings in that many different engines-- do you see a pattern here. low oil pressure, plugged filter, lugging, over reving. just a few of the things that could cause this. cleaning a jornal by crokets cloth is done if you have slight scratches. not on a spun bearing thats just taking a heck of a chance, these isx 600's were famous for this and seizing wrist pins. the newer ones not so much. if i remember there was a update on the early isx engines about oil filters coming apart and the debri going in the oil passages and restricting oil to certain vital parts.

 

That or a Series 60. There are plenty that have excellent power with tunes.