Close-up of camshaft, bearing caps and timing chains inside an a…

Close-up inside a DOHC aluminum cylinder head with the valve cover off, showing a camshaft held down by bolted bearing caps stamped with letters, its lobes and journals coated in oil. Two roller timing chains run over the cam sprocket at left, with a chain guide and oily passages visible in the head casting.

AI caption June 2003 · Photo 43 of 575