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An overhead valve engine, abbreviated (OHV) and sometimes called a pushrod engine, is a piston engine whose valves are located in the cylinder head above the combustion chamber. This contrasts with flathead (or "sidevalve") engines , where the valves were located below the combustion chamber in the engine block .
SOHC design (for a 1973 Triumph Dolomite Sprint) . The oldest configuration of overhead camshaft engine is the single overhead camshaft (SOHC) design. [1] A SOHC engine has one camshaft per bank of cylinders, therefore a straight engine has a total of one camshaft and a V engine or flat engine has a total of two camshafts (one for each cylinder bank).
The Ford Pinto engine was the unofficial name for a four-cylinder internal combustion engine built by Ford Europe.In Ford sales literature, it was referred to as the EAO or OHC engine and because it was designed to the metric system, it was sometimes called the "metric engine".
2.5 L; 152.5 cu in (2,499 cc) straight-four, with two (pushrod-actuated) valves-per-cylinder and indirect fuel injection. 92 mm × 94 mm (3.62 in × 3.70 in), the engine size is variably referred to as either 2,500 or 2,499 cc. This engine too has been called HR 492, signifying four cylinders of 92 mm (3.62 in) bore. Timing gears, not belt.
Later models came with hydraulic clutches. These were commonly found in Pintos, some Mustang II/Capris, and Rangers but do not match the V6 Bell housings. Changing the engine to a V6 often requires changing the bellhousing (Mitsubishi) but the Mazda trans had an integral bell. 2.6, 2.8, 2.9, and 2.9 Cosworth. Most of these were RWD car engines.
The common valvetrain configurations for piston engines, in order from oldest to newest, are: Flathead engine: The camshaft and the valves are located in the engine block below the combustion chamber. Overhead valve engine: The camshaft remains in the block, however the valves are located in the cylinder head above the combustion chamber.
The most common use of a rocker arm is to transfer the motion of a pushrod in an overhead valve (OHV) internal combustion engine to the corresponding intake/exhaust valve. In an OHV engine the camshaft at the bottom of the engine pushes the pushrod upwards. The top of the pushrod presses upwards on one side of the rocker arm located at the top ...
Considered advanced by Detroit engineering standards at the time, the Pontiac OHC 6 followed the Jeep Tornado I6 as the second post-World War II domestic-developed and mass-produced overhead cam automobile engine. [6] The Pontiac's single camshaft was supported by journals within the aluminum valve cover; no separate bearing shells were used.
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