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Oil Separator

 
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tdawson-townsend(at)auror
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PostPosted: Mon May 07, 2007 7:52 pm    Post subject: Oil Separator Reply with quote

What recommendations do folks have for the different models of Air/Oil Separators? Airflow Performance just came out with one that claims to be “designed for the IO-540”.

TDT


Tim Dawson-Townsend
40025
tdt(at)aurora.aero


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pitts_pilot(at)bellsouth.
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PostPosted: Mon May 07, 2007 8:14 pm    Post subject: Oil Separator Reply with quote

My recommendation is to save your money ... on all of them. If, for some reason, you really need one ...... well, I'd use the money to help fix the problem, not cover it up.
If you're still hell-bent on owning (and using) one, then direct the 'recovered' mess ino a can that you can empty. Do not return it to the engine for any reason.
Linn
do not archive

tdawson-townsend(at)aurora.aero (tdawson-townsend(at)aurora.aero) wrote:
[quote]
What recommendations do folks have for the different models of Air/Oil Separators? Airflow Performance just came out with one that claims to be “designed for the IO-540”.

TDT


Tim Dawson-Townsend
40025
tdt(at)aurora.aero (tdt(at)aurora.aero)


Quote:

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wayne.e(at)grandecom.net
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PostPosted: Tue May 08, 2007 2:48 am    Post subject: Oil Separator Reply with quote

I have a close A&P friend who's worked on my plane and he told me that I would be wasting my money on an oil separator. He seems to feel they don't really work that well.

For what ever it's worth.

Wayne Edgerton #40336

getting close
[quote][b]


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GRANSCOTT(at)aol.com
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PostPosted: Tue May 08, 2007 2:48 am    Post subject: Oil Separator Reply with quote

Our piper 235 is powered by an O-540, for years we had lots of grease/oil on the belly...at our annual a couple of years ago, I (under supervision) removed the breather tube and cleaned it out very well...soaking in a solvent tank and using a long bottle brush to scrub the thing...one would not believe the junk that was on the side walls. The aircraft still has a small amount of oil from time to time on the belly but on the whole we are keeping a lot more oil in the case and a lot less on the belly. 

I don't know the config of most other planes that have blow by problems but if one keeps the breather tube clean it probably will help rather than the O/A Separator's...IMHO. But this is just a personal observation and your mileage may vary.

Patrick

do not archive

See what's free at AOL.com.
[quote][b]


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Tim Olson



Joined: 25 Jan 2007
Posts: 2879

PostPosted: Tue May 08, 2007 3:13 am    Post subject: Oil Separator Reply with quote

My take on the separators is that while they may definitely keep the
belly clean, by throwing that waste back into the engine, I just
couldn't bring myself to buy one. The reason is, along with the
misted oil that's being trapped is all the acids and moisture, and
I've just been left with the thought that I'd be returning THAT
stuff to the engine as well. So I decided to save the money on
the part, but spend it on the oil and the belly cleaner. I'm not
saying the believers are wrong...I think the things have a good side
to them, but it's tough to get me to risk more engine wear and corrosion
for the benefits, even if it weren't likely. I have a hard enough
time getting my oil temps up to that 185 mark where moisture boils
off well...I don't need it dumped back IN.

Tim Olson - RV-10 N104CD - Flying
do not archive
Wayne Edgerton wrote:
Quote:
I have a close A&P friend who's worked on my plane and he told me that I
would be wasting my money on an oil separator. He seems to feel they
don't really work that well.

For what ever it's worth.

Wayne Edgerton #40336

getting close



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carl.froehlich(at)cox.net
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PostPosted: Tue May 08, 2007 3:49 am    Post subject: Oil Separator Reply with quote

I use the relatively cheap separator ($42) from ACS
http://www.aircraftspruce.com/catalog/eppages/hboilbreather.php in my
RV-8A. No complaints.

I do not however return the drain line to the engine. I mounted a pint can
to collect the goo. I end up with about a half inch in the can each annual.
I direct the output of the separator to just above one of the exhaust pipes.
Some recommend cutting open the back of this separator to add a SS scrubbing
pad to increase the surface area for condensation.

My main problem with oil on the belly came from a small, hard to find oil
leak on the prop governor mounting plate. It took several tries to find it,
and three attempts at fixing it.

Keep in mind the separator will not help the normal exhaust film on the
belly.

Carl Froehlich
RV-8A (320 hrs)
RV-10 (wings)

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glastar(at)gmx.net
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PostPosted: Tue May 08, 2007 4:04 am    Post subject: Oil Separator Reply with quote

Andair does have a new separator with an additional condensate "trap"

Looks real nice

Werner

Tim Olson wrote:
Quote:


My take on the separators is that while they may definitely keep the
belly clean, by throwing that waste back into the engine, I just
couldn't bring myself to buy one. The reason is, along with the
misted oil that's being trapped is all the acids and moisture, and
I've just been left with the thought that I'd be returning THAT
stuff to the engine as well. So I decided to save the money on
the part, but spend it on the oil and the belly cleaner. I'm not
saying the believers are wrong...I think the things have a good side
to them, but it's tough to get me to risk more engine wear and corrosion
for the benefits, even if it weren't likely. I have a hard enough
time getting my oil temps up to that 185 mark where moisture boils
off well...I don't need it dumped back IN.

Tim Olson - RV-10 N104CD - Flying
do not archive
Wayne Edgerton wrote:
> I have a close A&P friend who's worked on my plane and he told me
> that I would be wasting my money on an oil separator. He seems to
> feel they don't really work that well.
>
> For what ever it's worth.
>
> Wayne Edgerton #40336
>
> getting close
>




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jesse(at)saintaviation.co
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PostPosted: Tue May 08, 2007 5:18 am    Post subject: Oil Separator Reply with quote

I have used a cheap ACS (or Van’s) one as someone else mentioned, but it doesn’t have a return. It is just mounted between the breather port and the breather tube and I think it gravity feeds back into the engine when it stops. It seems to have helped a little, but not measurably. I also terminate the tube on the exhaust stack to try to burn off any oil that gets out there to keep it off the belly. I think most belly oil comes from leaks elsewhere if you keep the oil in the sump below 9 or 10 Qts. It seems to blow off down to 9 or so pretty quickly. We usually add a Qt when it gets down to 8.5. If you put 12 in, you will blow a LOT of it off very quickly in our experience.

Jesse Saint
Saint Aviation, Inc.
jesse(at)saintaviation.com (jesse(at)saintaviation.com)
www.saintaviation.com
Cell: 352-427-0285
Fax: 815-377-3694


From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of tdawson-townsend(at)aurora.aero
Sent: Monday, May 07, 2007 11:53 PM
To: rv10-list(at)matronics.com
Subject: Oil Separator


What recommendations do folks have for the different models of Air/Oil Separators? Airflow Performance just came out with one that claims to be “designed for the IO-540”.

TDT


Tim Dawson-Townsend
40025
tdt(at)aurora.aero

[quote] [b]


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LloydDR(at)wernerco.com
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PostPosted: Tue May 08, 2007 7:46 am    Post subject: Oil Separator Reply with quote

All of this talk about greasy belly's, just another reason to go Subaru, no noticeable oil burn between oil changes...or so I have heard, my engine will be shipping this week and I will be able to give a first flight report in the next month or so and let you all know how clean the belly is!
Dan
N289DT RV10E

From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of Jesse Saint
Sent: Tuesday, May 08, 2007 9:18 AM
To: rv10-list(at)matronics.com
Subject: RE: Oil Separator


I have used a cheap ACS (or Van’s) one as someone else mentioned, but it doesn’t have a return. It is just mounted between the breather port and the breather tube and I think it gravity feeds back into the engine when it stops. It seems to have helped a little, but not measurably. I also terminate the tube on the exhaust stack to try to burn off any oil that gets out there to keep it off the belly. I think most belly oil comes from leaks elsewhere if you keep the oil in the sump below 9 or 10 Qts. It seems to blow off down to 9 or so pretty quickly. We usually add a Qt when it gets down to 8.5. If you put 12 in, you will blow a LOT of it off very quickly in our experience.

Jesse Saint
Saint Aviation, Inc.
jesse(at)saintaviation.com (jesse(at)saintaviation.com)
www.saintaviation.com
Cell: 352-427-0285
Fax: 815-377-3694


From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of tdawson-townsend(at)aurora.aero
Sent: Monday, May 07, 2007 11:53 PM
To: rv10-list(at)matronics.com
Subject: Oil Separator


What recommendations do folks have for the different models of Air/Oil Separators? Airflow Performance just came out with one that claims to be “designed for the IO-540”.

TDT


Tim Dawson-Townsend
40025
tdt(at)aurora.aero

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billderou(at)yahoo.com
Guest





PostPosted: Tue May 08, 2007 8:59 am    Post subject: Oil Separator Reply with quote

Lots of good comments on this subject by everyone. I installed a "certified" unit on my Piper Archer and it made no change to the oily belly or oil consumption rate (seperated oil routed back to case).

My RV-10 belly stays fairly clean and I have not cleaned it yet (80 hrs). I keep oil level at 10qts and routed breather exit close to the muffler and ended tube 1/4" above muffler. I believe this exit location away from fast air flow and close to the hottest end of the exhaust pipe lets the drops hit the hot tube and provides more burn time as the residue migrates down and out.

I have this unproven theory that the drops are flying into the airstream and end up on the belly rather than gently dropping onto the exhaust pipe and burning. Perhaps the breather exit geometry accounts for the different experiences. If I were to do this again I would squeeze the end of the breather tube into an oval shape with the long axis of the oval parallel with the exhaust pipe to increase the probability that the drops will fall onto the top center of the exhaust pipe.

Bill DeRouchey
WTD Aviation Technology
N939SB, flying


Jesse Saint <jesse(at)saintaviation.com> wrote:
[quote] v\:* {behavior:url(#default#VML);} o\:* {behavior:url(#default#VML);} w\:* {behavior:url(#default#VML);} .shape {behavior:url(#default#VML);} <?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /> st1\:*{behavior:url(#default#ieooui) } I have used a cheap ACS (or Van’s) one as someone else mentioned, but it doesn’t have a return. It is just mounted between the breather port and the breather tube and I think it gravity feeds back into the engine when it stops. It seems to have helped a little, but not measurably. I also terminate the tube on the exhaust stack to try to burn off any oil that gets out there to keep it off the belly. I think most belly oil comes from leaks elsewhere if you keep the oil in the sump below 9 or 10 Qts. It seems to blow off down to 9 or so pretty quickly. We usually add a Qt when it gets down to 8.5. If you put 12 in, you will blow a <?xml:namespace prefix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" />LOT of it off very quickly in our experience.

Jesse Saint
Saint Aviation, Inc.
jesse(at)saintaviation.com (jesse(at)saintaviation.com)
www.saintaviation.com
Cell: 352-427-0285
Fax: 815-377-3694


From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of tdawson-townsend(at)aurora.aero
Sent: Monday, May 07, 2007 11:53 PM
To: rv10-list(at)matronics.com
Subject: Oil Separator


What recommendations do folks have for the different models of Air/Oil Separators? Airflow Performance just came out with one that claims to be “designed for the IO-540”.

TDT


Tim Dawson-Townsend
40025
tdt(at)aurora.aero


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