What causes crankcase explosion?

Answer Posted / bejoyed

so why should the oil mist get accumulatedin the crankcase
#1?? ur answer is partly right.. i would say..
this oil mist is produced continouosly as the oil get warmed
up as the engine runs...
also,from every cylinder exhaust gas leaks into the
crankcase(oil sump) in small quantities always(blow by to a
small extent), this heats up the oil.. when the temp reaches
the ignition point of oil mist, it causes an explosion..

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