It failed, but wasn't the cause. It failed as a result. Amazingly its still pretty well intact with a short crack. Nope, the piston is what failed, the cylinder and rod are simply victims.Cylinder wall failure??
Funny Paul. Trust me, that thing didn't fall out of the cylinder on its own. It required some persuasion. If I didn't KNOW what caused it to fail, I would be totally stumped myself. I only put this up to see what the guesses would be.Like we could tell from that picture alone. The second problem was that you ripped it out with your bare hands. Next time try taking off the rod bolts as it might damage less stuff.
Excellent guess Vette, and would be my guess if I was looking at the pic. In reality, the pin has no signs of heat nor does the pin bore. I have had pistons fail from tight pins or flex, but it usually results in the pin boss being pulled completely from the piston. The pin pulls out and stays with the rod swinging around cause hell. Actually the engine is in pretty decent shape aside of the cylinder and this piston and rod.Pin too tight maybe?
Yeah, its out of our 300 enduro motor. It took some restraining to keep Bill from kicking some serious ass when he got back ton shore. To say he was pissed would be a huge understatement.Is this yours? If so it would eliminate some of my thoughts as to the build. Either way, that picture does not help be much. I am sure better individuals with more experience might be able to pick it right out.
Stock off the shelf SRP with a 1.52 compression hieght. Same piston used in a 4.25 stroke low deck 496 with a stock 6.135 rod.Was that a custom piston Bob? The few I have seen break like that were customs and there was very little metal between the top of pin and oil ring groove.
Yeah, its out of our 300 enduro motor. It took some restraining to keep Bill from kicking some serious ass when he got back ton shore. To say he was pissed would be a huge understatement.
Stock off the shelf SRP with a 1.52 compression hieght. Same piston used in a 4.25 stroke low deck 496 with a stock 6.135 rod.