Oil from the breather hose

[shawn coleman]

Re: Oil from the breather hose

I know you said you did not want to buy an air oil separator, but I have had m-20 on my f-19 for the past three or four years, and I think it is the best thing . I have ever put in my airplane I realize the price has gone up a lot since I bought mine . I think, I paid 150 for mine, anyway . I am almost positive it has paid for itself by now . I used to use about a quart of oil an hour now I use a little over a quart every 20 hours or so . plus, I have virtually no mass under my plane, and before the entire underside was black and one advantage for me is that in the summer . I can put 6 qts. in my plane . it helps my engine run cooler, and I don't have to worry about losing it to blow by .

Just figured I would pass on the information
shawn coleman
208ap

[Forrest Barber]

Re: Oil from the breather hose

The "whistle slot" is an absolute requirement. It is merely a cut into the tube on top of the horizonal section and the foward part pushed inward. Prevents pressure if iced over on the bottom and breaks any vaccum created by an improperly placed breather tube exit,should be in a neutral area. I will try to find a diagram , maybe Cessna 150 service letter?? OR run a tube aft down the landing gear

[Dano"T"]

Re: Oil from the breather hose

Here is the extended tube on an O-200 that someone mentioned. A nice fellow out in Washington sent this to me....also see this link he sent

[NY86]

Re: Oil from the breather hose

Another cause of oil out the breather tube is excess crankcase pressure. This can come from blow by or preasurization through the crank seal or the oil fill tube seal. Continental issued SB a while back on how to test for excess crankcase pressure. i'd look there (and do the other 2 mods mentioned previously) before spending money on a separator. They are not without their negatives, either, as you are routing all that garbage back into the crankcase.

[flyguy]

Re: Oil from the breather hose

In reference to putting a clip on the hose; what happened when the the tube froze up on those aircraft? For those engines that "don't have any blowby" I wonder where all that black carbon and the other brown crap in the oil comes from?
DC

[alwaysoar]

Re: Oil from the breather hose

Are you running with full oil? I find on my 65 that at full 4 qts some squirts out the breather, but at 3.5 none does. My compression is high 70's.

[alwaysoar]

Re: Oil from the breather hose

John. I couldn't find the SB for testing crankcase pressure. Do you know the number?

Ed@BTV VT
TF 527

[N96337]

Re: Oil from the breather hose

Flyguy, those engines usually puked the nose seal and made a big mess all over.. I agree on the "no blowby" comment... no engine has 0 blowby... just minimal.
John H.

[selje]

Re: Oil from the breather hose

I one had an early PA-18 with C-90 engine and M-20 air-oil separator that worked great. Has anyone had one of these on an A-65?

[Yellow Duck]

Re: Oil from the breather hose

Guess I am lucky. I have very little blow by. Wipe down about once a week seems to do the trick and keep eveything clean. Well almost. The thing that does get what ever blow by from the breather tube seems to get on the "Turbo Alternator", so I wipe that down also. I find a little "WD-40" and a rag does the trick very quickly.

[flyguy]

Re: Oil from the breather hose

Mine goes up and over and down the back. Only seems to drip out a little condensate oil mix after each flight. I did have an oil leak for quite a while, so I guess I'll have to clean up the underside one of these days. I wonder if that will make me less visible from a lower altitude looking up? LOL. It is on my list about the 133 item down.
DC
I had a 172 with O300 that had a obstructed puke tube, blew the front oil seal.

[NY86]

Re: Oil from the breather hose

John. I couldn't find the SB for testing crankcase pressure. Do you know the number?

M89-9
(Response must be at least 10 characters)

[waltermrich]

Has any one on the forum ever done a 337 for installation of a crankcase air oil Seperator, the are some available from Aircraft Spruce, there may even be an STC'd one for a 65hp from Air Wolf but the price is astronomical.

[Scott]

Search for "aerobatic breather" mod.
turns your breather crankcase fitting into an oil separator.

[waltermrich]

Thank you Scott, noy yet sure how to do this, but can read it again.