Overhead valves open vertically from the head into the combustion chamber. Overhead valve engines use a system of lifters, push rods, and rocker arms to operate the valves. The cam on an overhead valve system is adjacent to the crankshaft, and the lifters, push rods and rockers work together to operate the valves. Overhead cam engines position the camshaft directly above the valves. In that position, there is much less weight of the valve operation mechanism, resulting in a potentially higher engine operating speed.
It's a valve that's over your head
Mainly, the difference is that in an overhead cam engine, the camshaft is mounted on the head of the engine, and the valves are still overhead, in an overhead valve engine (sometimes called a "pushrod motor"), the camshaft is in the crankcase.
Under the valve cover, of an overhead valve engine. They push the rockers on the opposite side of the valve stems. Overhead Cam engines do not have push rods.
the advantage of OHC : - more accurate control of valve operation, especially at higher speeds. where as the OHV is more complicated due to the pushrod and rocker system that was added. hope this helps x
Fewer moving valve train parts such as the push rods.
Single Overhead Valve Engine
Jeep uses an orfice line, not a pcv system. They can only be purchased at the dealer.
16 valve and double overhead cams
the advantage of OHC : - more accurate control of valve operation, especially at higher speeds. where as the OHV is more complicated due to the pushrod and rocker system that was added. hope this helps x
You can run the overhead, on your 3126 Caterpillar diesel engine, by removing the valve covers. The overhead can be adjusted with the adjusting screws.
The original overhead valve or OHV piston engine was developed by the Scottish-American David Dunbar Buick around 1902.