Questions and Answers
What is the primary source of lubrication for the valve mechanisms?
How is oil returned to the sump throughout the engine?
What is lubricated by oil escaping from the connecting rod and main bearings?
What lubricates the gears in the crankcase cover cavity?
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What is lubricated by drilled passages from the crossover oil gallery?
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Study Notes
Engine Lubrication System
- Connecting rod bearings are lubricated through drilled passages in the crankshaft, which receive oil from the main bearings.
- Valve mechanisms receive lubrication through hollow pushrods from the tappets.
- Cylinder walls, piston pins, and connecting rod bushings are spray-lubricated by oil that escapes from the connecting rod and main bearings.
- Gears in the crankcase cover cavity are lubricated by spray from the rear main and rear camshaft bearings.
- The vacuum pump adapter pad, mounted at the front lower side of the engine, is lubricated through drilled passages from the crossover oil gallery.
- Oil is returned to the sump throughout the engine by gravity.
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Description
This quiz covers the lubrication system of an engine, including how different parts are lubricated. From connecting rod bearings to valve mechanisms and gears, learn how it all works.
