Originally Posted by geezer69
i had a steel crank and block, 283. i couldnt tell from just lookin. the guy that gave it to me showed me the ping thing. i couldnt really do that either. even side by side with a cast crank. hahaha. he also said he can find a crack in a crank by that ping test. is he b s'n me or do you guys know anything about that. i dont know much about engines. just piddle with em.
Some cracks at the earliest stages are barely visible even w/penetrant or magnaflux, but the different sound w/a cracked crank crack is
legit. The sound is very different w/a significantly cracked crank and to someone who deals w/them on a regular basis its a no brainer. Not so much to someone like us who don't handle cranks a hundred times a day unless the crack is bad or you have a good one to compare it to.