General Motors sees a future for engines with overhead valves, a technology most automakers have abandoned in favor of overhead camshafts. GM will introduce a new family of overhead-valve (OHV) V-6s ...

General Motors Corp. sees a future for engines with overhead valves, a technology most automakers have abandoned in favor of overhead camshafts. GM will introduce a family of overhead-valve V-6 ...

Overhead valve (OHV) engines have their camshaft housed within the engine block, while overhead camshaft (OHC) engines have ...

Adjusting overhead valves on heavy-duty ­diesels is a routine maintenance item subject to benign neglect in many of today’s fleets. The hardware that links the camshaft to the valves and some ...

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 ...

Muscle cars have always commanded awe and yearn from the American auto connoisseurs courtesy their blazing speed and dramatic looks. Interestingly, the fair share of speed technology incorporated in ...

Some automakers are famous for specific cars, others for innovating when the world seemed stuck in the mud. Some, like Volvo, are famous for safety, but some fly under the radar, their greatest ...

Electric cars are all the rage lately, but let’s not forget about the old standby – internal combustion. The modern internal combustion engine is a marvel of engineering. Today’s engines and ...

It seems, for the modern American production car. that the 'L' head engine is a thing of the past. Present design trends indicate that the few remaining flathead engines now in production will be ...

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 ...