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Air/oil separator GPU engines

B

BUD1

Well-known member
I've never heard of an air/oil seperator before. They are fore GPU's and advertise keeping oil from blowing out the crankcase vents. Boy that would save alot of oil consumption. I wonder do they work??? Anyone had any experence with one???
 
Yes, they work. We use them on aircraft. The oil that is blown out the vent is collected in the canister and it drips back into the engine. There are 3 ports on the canister. One to the vent, one to exhaust the air and one small one to the drain. It usually drains back into a port on the accessory case. Sometimes if there is no port on the accessory case people will make a drain back port on a valve cover. Then again you could just use a jug to collect the blow by oil.

You may not want to put it back into the engine. Along with the oil is usually moisture that is cooked off and blown out the vent. They were necessary on aircraft with wet vacuum pumps to put the oil from the vacuum pump back into the engine.
 
it would seem like a good idea but as you said I would be worried the water would get trapped also and run back into the engine thus never letting it leave , of course I am one of those people that have to see something work to believe them :lol:

If you try it let us know how it woks out
 
I forgot to add that the oil water separator doesn't completely eliminate oil blow-by but it does help. If you have huge oil consumption, you need to find the reason why and fix that problem. I don't use one on either of my airboats and I have a few extras just setting around I could use.
 
Thanks for tht info I guess I'm still undecided weather one would be an advantage or not.
 
i have something of that nature on my converted gpu.it is on the ass. housing.where alot of people put the vent tube.it is a canister made of alum.about 3 inches round with chor boy in it . at the top of the canister it has a spot for the blow by tube.i have not had any luck with it.but i also have had a cylinder down one my motor since day one.i ended up putting the rear blow by tube back on also and stopped all oil leakage!!!!!
 
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