Close-up of a crankshaft main journal and main bearing caps insi…

Close-up inside an oily engine block showing a polished crankshaft main journal with two oil holes, flanked by counterweights and dark cast-iron main bearing webs with hex-head bolts. A connecting rod cap with studs and nut sits below in the shadow; the block is on a stand outdoors over gravel.

AI caption July 2006 · Photo 32 of 79