Pinto Car Club of America

These three horizontal scratches on the cylinder walls appear to be only a couple thousandths on an inch deep... my concern is how they were caused?

I believe honeing with a drill with one of those starburst looking things with the balls on the ends will remove them... but I am wondering if were caused by cracking?  I looked through one of the coolant channels and I can not see a crack... just makes me worry.

 No, that is not a crack. 2.0 blocks dont realy crack. It is an interesting set of scores. I would run a hone through it and see if it cleans up.

I'd pull the piston and look at the ends of each ring to see if the end gap is too small. Those 3 scratches are about at the same location as the rings when the piston is at top dead center. If the but end of the rings shine, that probley your problem.

My knee-jerk-know's-nothing-but-willing-to-take-a-guess reaction is:

The car has sat or slightly overheated and the rings became lightly "welded" to the cylinder walls. When the car was restarted, they broke free. My guess is honing the cylinder(s), cleaning the ring groves in the piston(s), and replacing the rings will suffice.

sounds correct to me as the #3 cylinder got way too hot it looks like as the exhaust valve is white due to the carbon being super heated...

thanks guys !