Close-up of piston crown with valve reliefs inside a cylinder bo…

Close-up down a cylinder bore on a disassembled engine with the head removed, showing the domed piston crown with valve-relief pockets sitting near the top of the honed bore. Head-bolt holes and a dowel ring surround the deck, and green coolant residue with droplets pools on the piston top.

AI caption July 2008 · Photo 4 of 8