Why The Engine Needs Oil
The oil in an engine does more than just cut down friction and wear by lubricating the pistons, bearings and other moving parts.
It also helps to seal hot high-pressure gases, takes heat away from hot areas and disperses it to the air through the sump. Engine oil also reduces corrosion and absorbs some of the harmful waste products of combustion.
Engine Oil is carried in the sump, at the bottom of the engine and forced by a pump through a filter to the main bearings. The pump will normally deliver several litres of oil a minute, at a pressure controlled by a relief valve.
From the main bearings, the oil passes through the feed-holes or grooves into passages in the crankshaft and on to the big-end bearings of the connecting rods.
In some engines, the oil is taken to the gudgeon pins through passages drilled in the connecting rods. The cylinder walls and gudgeon-pin bearings are lubricated by oil escaping from the ends of the bearings and dispersed by the rotating crankshaft
An insufficient flow of lubricant will lead to rapid wear or seizure of the engines moving parts, by metal grinding against metal. It will also cause engine failure, by destroying the surfaces of the piston rings and allowing high-temperature gases to blow past the pistons.Following the oil change recommendations in your handbook is imperative to prevent sludge buildup that may result in costly repairs. Click To Tweet
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