Re: Ceramic coating pistons and heads
Posted: January 28th, 2014, 9:37 pm
ive torn down several high millage 4.0's and i would be more concerned with keeping the intake manifold, and ports clean of carbon..ive seen it nearing .5 thick!!!while the valves are clean from the single hole injectors spraying them...no wonder old 4.0's get so flat on top!!!