Search results

I have cracked piston. I was cleaning the carbon off the top of them and noticed a small crack. The intake valve was not seating properly on that cylinder causing the backfiring. In general, what could be some of the causes for the piston to be cracked?

I have recently been told that if I don't install valve seats in my model A block I will have major problems down the road because of the lack of lead in the gas. also that adding a lead additive makes the fuel too heavy for the updraft carb to run right. any thoughts?