[Tom Wesenberg]

My stock engine had ping with the slightest acceleration, even with the spark at half way down. Turned out the cooling chamber had a lot of rust buildup in the rear of the block, and this caused a hot spot, which resulted in ping. It also caused the rear pistons to run too hot and slightly collapse the skirts. I flushed out the block and cured the ping, but I still have some light piston slap.