If the bolts worked loose it is very possible that it could have cracked the block. It isn't very thick in the area that it bolts on and if it got a bit crooked while cranking the engine it's possible.
BUT, depending on where the crack is and how bad it is you might be able to make a repair that would hold. You would replace the starter bolts with longer studs that can screw into the hopefully undamaged threads deeper in the block. Then use those to secure the starter. Perhaps add some loctite to keep them from getting loose.
This depends on how bad the damage is though.
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Wednesday, March 22nd, 2017 AT 12:05 PM