Thread: Piston Coatings 101

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Just think of what those pieces of hard ceramic will do to your cylinder when they start to flake off the crown.

When I want to know what is worth my money and what is not, I look to the guys that do the big diesels like Wartsila. With the amount of fuel those engines burn, a percent here or there can equal a million dollars a year or more. Also with the cost of the engine, tens of millions of dollars, a couple of grand here or there to coat a piston or something would add insignificantly to the cost. Even so, none of them coat their piston crowns (they are polished, though). They don't use skirt coatings, though, because the pistons on the really big engines have no skirts.