Ford Division's first overhead valve V-8, the Y-Block, remains one of the sexiest V-8 engines ever with its perfect symmetry, finned and studded Thunderbird Special valve covers, dual-plane "stacked ...

Time was when a valve job was done with some valve-grinding compound and a vacuum cup on a stick. But no more. Today's high performance engines require the same machining precision in the valves that ...

General Motors has spent decades refining overhead-valve V8s while much of the industry pivoted to dual overhead cam designs, turbocharging, and downsized blocks. I set out to understand why Chevrolet ...

General Motors’ all-new 3.9L V6 has been honored with a Breakthrough Technology award by Popular Mechanics for its innovative use of variable valve timing in an overhead valve engine. For ages GM has ...