Quote:
Originally Posted by wingzero_
^^what he said, but he forgot oil catch can.  |
yes, thankya.
Catch can because a mist of oil is often also blown by piston rings from the oil ring and then recirculated back into the intake system via the pcv valve. A catch can and breather stops this.
and "harmful" because the gases are "blow-by from the combustion chamber, if the high pressurized gas was not permitted to escape pressure would build up in the crank.
R.E.D.
Rapid Energetic Disassembly.
