I picked up a 58 Mark III not long ago, the engine has a scar on the #5 cylinder wall, looks like broken rings, I have yet to take it to the machine shop but just to get some input from the experts here, if its deep enough would sleeving be a good option or boring is the only way to go?


Thanks.

Your question can only be properly answered after a machinist has taken a look at it. It's almost impossible to give advise without at least a photo. A machinist can also do a pressure and a sonic check that will reveal what can be done.

Here are some pics.

What do you think, is it a piston seizure or does it go deeper like a crack? A crack wouldn't be that straight, but you never know.

It doesn't look like a crack, is it possible that a broken ring could've done that?

In some cases, where the bore is miked O.K., it can be sufficient to just hone the bore. I assume that your block has seen quite some mileage, so boring and honing would be your option I guess. Again, it's better to let a machinist inspect the block.

I'll take it to a machine shop when I get a chance, hopefully is not that bad, thanks Theo.

You're welcome. Good luck.