PURPOSES OF LUBRICATION
of an engine lubrication system are as follows:
friction and wear between moving parts (fig. 6-18).
transfer heat and cool engine parts.
the inside of the engine by removing contaminants (metal, dirt, plastic, rubber, and other
particles) (fig. 6-19).
shocks between moving parts to quiet engine operation and increase engine life.
of engine oil and the design of modern engines allow the lubrication system to accomplish
Figure 6-18.How oil lubricates.
of oil contamination.