Is this Kohler block any good

[Bach-Ed 170]

Last year this K241 threw a rod.  And as it went it damaged the bore.  I later heard that some lower damage can be tolerated when rebuilding.  So is this still a usable block or is it only fit to be a boat anchor?

[JAinVA 4,619]

If that damage is below the  piston skirt bottom at bottom dead center and there are no radiating cracks from the damage you should be good to go.The piston doesn't travel all the way to the bottom of the bore anyway.If you won't have to put a lot of money into I say go for it,JMHO,JAinVA

Edited October 13, 2016 by JAinVA

[953 nut 55,243]

If it is not in need of being bared I would think it is going to be OK. You may want to have it magnafluxed to be sure there are no cracks.

[JAinVA 4,619]

As Richard says you could get the block magnafluxed.That is the best way to make sure that the damage hasn't let unnoticed cracks cause a problem.If that service isn't available to you, try a dye penetrant test.While not as good magaflux it can detect cracks.Again if little money is at stake and you know the risks button her up and see what happens.These old Kohlers are some of the toughest air cooled engines ever built.JMHO,JAinVA

Edited October 13, 2016 by JAinVA

[oldredrider 2,548]

I've successfully rebuilt blocks in much worse shape than yours. Sleeving the cylinder is another option if necessary. 

[Howie 886]

Knock the sharp edge off of that hone it or bore it and use it. My K301 is similar to that and has been in service since 1985. It could be 

sleeved as mentioned above.

[WH nut 553]

Run her