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Simpler camshaft drive system: OHV engines have a less complex drive system for the camshaft than OHC engines. [16] Most OHC engines drive the camshaft or camshafts using a timing belt, a chain, or multiple chains. These systems require the use of tensioners, which add complexity. In contrast, an OHV engine has the camshaft positioned close to ...
All of this is side-show to what I said, that OHV engines (though more complex) are intrinsically more reliable than OHC engines. OHV can safely be drip or splash fed with oil (sometimes pushed through hollow pushrods without assistance from the oil pump). Whereas OHC engines have spinning bearings, so they're much more dependent on lubrication.
This reduced inertia in OHC engines results in less valve float at higher engine speeds (RPM). [1] A downside is that the system used to drive the camshaft (usually a timing chain in modern engines) is more complex in an OHC engine, such as the 4-chain valvetrain of the Audi 3.2 or the 2 meter chain on Ford cammers. Another disadvantage of OHC ...
Some engines, such as the Fiat Twin Cam engine of 1964, began as OHV engines with an oil pump driven from a conventional camshaft in the cylinder block. When the twin overhead cam engine was developed, the previous oil pump arrangement was retained and the camshaft became a shortened stub shaft.
The engine block and associated components for the USA market Isuzu G-series engines were locally produced under license by a GM engine casting and assembly plant in Flint, Michigan. In South America an overhead-cam version was adapted, and later developed into a 1599 cc version with a 75.7 mm stroke. [18] 82 mm (3.2 in) 66.2 mm (2.61 in)
The High Value engine family from General Motors is a group of cam-in-block or overhead valve V6 engines.These engines feature cast iron blocks and aluminum heads, and use the same 60° vee bank as the 60° V6 family they are based on, but the new 99 mm (3.90 in) bore required offsetting the bores by 1.5 mm (0.059 in) away from the engine center line.
Simplicity is an important feature of the PC50 with an automatic clutch driving a fixed ratio, splash lubrication to the engine parts except for the use of a small pump to the parallel valves. The sump has an oil capacity of 0.8 - 0.9 litre for the OHC model and 0.75 litre for the OHV. The engine has an 8.5:1 compression ratio, coil ignition ...
The Jeep Tornado engine was the first post-World War II U.S.-designed mass-produced overhead cam (OHC) automobile engine. [1] The 230.5 cu in (3.78 L) hemi-headed straight-six was introduced in mid-year 1962, and replaced the flathead "6-226" Willys Super Hurricane that was in use since 1954.
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