compression leak

[Charlie Broring]

Those are pretty deep dings in the pistons, especially cyl #1. When that happens near the edge of the piston it can distort the top ring grove. If it was my motor I would pull at least #1 piston and make sure the ring is still free in the grove and not pinched. It the top ring grove was not distorted I would flatten the raised metal around the ding with a file and reuse the piston. I have used pistons with some really ugly dents in the top from dropped valves or other debris that went through the motor.

 

[hgrewal]

Thanks for all the advice guys. I will talk to Robello guys again as well regarding reusing the pistons and see what they suggest.

As for the blueprinting questions that David asked, in the blueprinting and balancing process the pistons and connecting rods are all weighted and lightened to match the lightest weights out of all 4. Which means that if I do end up replacing any of the pistons, I will probably have to get it weight matched with the older piston (though I might be wrong on this point so correct me if thats the case) in order to make sure the motor is still fully balanced.