When you're shopping for a mower, a number of considerations may go through your mind. Will it be easier to start than the last one? Will it last longer? To determine a mower's long-term odds, take a ...

Many older cars have engines with flathead or overhead valves, and these designs also tend to more commonly used flat tappets for actuating the valves. Flat tappets place a unique demand on the engine ...

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 ...

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 ...

Add Yahoo as a preferred source to see more of our stories on Google. Camshafts are simple devices, but important ones. Modern engines can have one or more intake and exhaust valves, and it's the ...