 bent valve issues they're kind of folding over like an umbrella in the rain and they're leaking but not always if we put air pressure in the cylinder they they seal up we're like okay i don't hear anything and then we crank it over and the compression's gone it won't run then we put air in there again and they seal up and then nothing and the carbon and the valve being tulipped out a little bit is causing the problem and it's just a steel issue they're having some of these new ones but