Turn the crankshaft journal to the side as far as possible, and pull the piston down as low in the cylinder as it will go. It's not likely to be able to move far enough to expose the piston rings, but you might be able to see enough of the piston skirt to check for cracks where the Invar anti-expansion strut surrounds the wrist pin. Use one of the high-intensity LED flashlights that are available at most parts stores. That's the most likely place to find a crack. Just be careful not to nick the surface of the crank journal with the side of the connecting rod.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!