Re: Curious Cub. Oil in the donaldson air cleaner?

Posted by ScottyHOMEy on February 22, 2011 at 21:14:53 from (70.105.250.149):

In Reply to: Re: Curious Cub. Oil in the donaldson air cleaner? posted by moondoggie on February 22, 2011 at 18:15:51:

"The cup doesn't get that hot."

Precisely. The filter might warm up a little with heat from the block through the mount, but it is always drawing in cool air under vacuum so it never gets truly warm. When in operation, most of the oil that rests in the cup is up in the mesh/wool and any moisture in the intake air, whether it passes over or throght the oil has an opportunity, if the conditions are right, to emulsify to some extent with the oil.

At the same time, that filter is subject to the same kind of inernal condensation that can get into a crankcase, that from wide and rap[id temperature fluctuations while it is just sitting.

The difference is that your crankcase oil will get hot when you run it and if run long enough will steam off any water that has emulsified with the oil. That filter cup never gets hot enough to do the same thing.

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