Close-up of a carbon-caked combustion chamber and valves on a re…

Extreme close-up into a single combustion chamber on a removed cylinder head, showing thick black carbon deposits on the chamber roof and exhaust valve, a cleaner intake valve face, and the spark plug hole with its threads exposed. Crusty deposits and oily residue coat the deck surface around the chamber.

AI caption March 2006 · Photo 101 of 159