Oil cooler

Al & Deb Paxhia · Post by **Al & Deb Paxhia** » Fri Feb 17, 2012 9:02 pm

Hi Bob,
I will bend up a single louver with a temporary mounting and see what
happens during flight test.
Thanks,
Al
----- Original Message -----
From: "Bob Patterson" <bob.patterson@canrem.com>
To: <murphy-rebel@dcsol.com>
Sent: Thursday, June 07, 2001 6:34 PM
Subject: Re: Oil cooler

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Hi Al !

It might be a good idea to put a scoop facing back over the
front of the opening in the cowl. That would break the airflow up
and create a little suction to help the cooler. Could be just bent-up
sheet, maybe 3/4" high ...
......bobp

-------------------------------orig.--------------------------------------

-

At 10:03 PM 6/5/01 -0700, you wrote:
The oil cooler discussion has started to make me think I may have a
problem. My SR has the IO540 and the oil cooler is too large to mount on

the

back of the baffling. Murphy used two smaller coolers, one on each side.

I

mounted one large cooler on the inside of the cowling, flush against the
left side. Ram air comes from a 3" scat duct from the front of cyl #1. The
air goes to a box on the back of the cooler and exits through the side of
the cowl. My thinking was to get the coolest ram air possible and exit
that air with out adding any pressure to the lower side of the engine. My
question is, will the air flow around the outside of the cowl keep air

from

exiting the cooler? Has anyone experienced this type of installation? Do

you

think I need to break up that air flow? If so how?
Al Paxhia
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<META content="text/html; charset=iso-8859-1" http-equiv=Content-Type>
<META content="MSHTML 5.00.2919.6307" name=GENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=#ffffff>
<DIV><FONT face=Arial size=2>The oil cooler discussion has started to

make me

think I may have a problem. My SR has the IO540 and the oil cooler is too
large
to mount on the back of the baffling. Murphy used two smaller

coolers,

one
on each side.  I mounted one large cooler on the inside of the

cowling,

flush against the left side. Ram air comes from a 3" scat duct from the
front of
cyl #1. The air goes to a box on the back of the cooler and exits through

the

side of the cowl.   My thinking was to get the coolest ram air
possible and exit that air with out adding any pressure to the lower side
of the
engine. My question is, will the air flow around the outside of the cowl

keep

air from exiting the cooler? Has anyone experienced this type of

installation?

Do you think I need to break up that air flow? If so how?</FONT></DIV>
<DIV><FONT face=Arial size=2>Al Paxhia</FONT></DIV></BODY></HTML>

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brian amendala · Post by **brian amendala** » Fri Feb 17, 2012 10:17 pm

rebel flyers, does anyone have oil temp problems in their rebels. I live
in Olympia WA and the OAT seems to peak at about 70-75 degrees during the
summer. My oil temp at these temperatures stays right around 190-195.
However if the OAT reaches around 90 degrees I see 210 on my oil temp gauge.
This is at cruise (2300-2400 rpm.) I am curious as to what oil coolers
people are using that fly in hotter temperatures.

Thanks Brian

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Bob Patterson · Post by **Bob Patterson** » Fri Feb 17, 2012 10:17 pm

Hi Brian !

Your oil temps sound just fine ! You should push it over
212 degrees occasionally, on climb, anyway, to drive out any water
that might accumulate there.

In hotter weather, it is much better to run <single grade>
oil - straight 50, rather than 20-50, as it will give better
lubrication at higher temps., and runs slightly cooler (as well as
being a bunch cheaper !) . ;-) :-)

I'm running the standard oil cooler, mounted on the firewall.
It poits down to the center for exhaust, and is fed by a 3" SCAT
tube (with a window screen over the inlet) off the back of the
left top baffle. Works so well I have to block it off in winter
to get the oil warm enough - do see about 220-230 on really hot
summer days after long climbs, though.

.....bobp

---------------------------------orig.--------------------------------
At 04:04 PM 7/5/02 -0700, you wrote:

rebel flyers, does anyone have oil temp problems in their rebels. I live
in Olympia WA and the OAT seems to peak at about 70-75 degrees during the
summer. My oil temp at these temperatures stays right around 190-195.
However if the OAT reaches around 90 degrees I see 210 on my oil temp gauge.
This is at cruise (2300-2400 rpm.) I am curious as to what oil coolers
people are using that fly in hotter temperatures.

Thanks Brian

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George Coy · Post by **George Coy** » Fri Feb 17, 2012 10:17 pm

check the Shell oil web site for some good info on oil temps. I presume you
are talking about outlet oil temps as in a Lycoming. Inlet oil temps should
allow for a 50 deg or so rise in the engine and thus 180 to 190 deg. f is
plenty high.
George Coy

-----Original Message-----
From: murphy-rebel@dcsol.com [mailto:murphy-rebel@dcsol.com]On Behalf Of
Bob Patterson
Sent: Friday, July 05, 2002 7:20 PM
To: murphy-rebel@dcsol.com
Subject: Re: oil cooler

Hi Brian !

Your oil temps sound just fine ! You should push it over
212 degrees occasionally, on climb, anyway, to drive out any water
that might accumulate there.

In hotter weather, it is much better to run <single grade>
oil - straight 50, rather than 20-50, as it will give better
lubrication at higher temps., and runs slightly cooler (as well as
being a bunch cheaper !) . ;-) :-)

I'm running the standard oil cooler, mounted on the firewall.
It poits down to the center for exhaust, and is fed by a 3" SCAT
tube (with a window screen over the inlet) off the back of the
left top baffle. Works so well I have to block it off in winter
to get the oil warm enough - do see about 220-230 on really hot
summer days after long climbs, though.

.....bobp

---------------------------------orig.--------------------------------
At 04:04 PM 7/5/02 -0700, you wrote:

rebel flyers, does anyone have oil temp problems in their rebels. I live
in Olympia WA and the OAT seems to peak at about 70-75 degrees during the
summer. My oil temp at these temperatures stays right around 190-195.
However if the OAT reaches around 90 degrees I see 210 on my oil temp

gauge.

This is at cruise (2300-2400 rpm.) I am curious as to what oil coolers
people are using that fly in hotter temperatures.

Thanks Brian

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Rick Harper · Post by **Rick Harper** » Fri Feb 17, 2012 10:17 pm

G'day Brian !

We get a few "warm days" :-) down here (Australia) ... and I have had my share of oil temp worries too !

I am now using one of the oil coolers supplied by Vans (RV guy) for his 0-320 builders .. (it was a WHOLE LOT cheaper than buying a certified one !) ....

It's mounted ON the firewall & has a 3 & 1/2" scat hose running to it from the rear left (as you sit in the plane ) side of the engine baffling ... PLUS I have made an outlet duct FROM the oil cooler which runs to the lower left hand side of the cowl , with an outside "bubble" over the hole which creates a low pressure area and helps EXTRACT the outgoing warm air ( and this bit REALLY made a noticeable difference to temperatures let me tell you !!!)

Hope this helps

Rick & Wendy Harper
541R
In sunny, but COLD at present Sydney :-(

----- Original Message -----
From: brian amendala (n667ba@hotmail.com)
To: murphy-rebel@dcsol.com (murphy-rebel@dcsol.com)
Sent: Saturday, July 06, 2002 9:04 AM
Subject: oil cooler

rebel flyers, does anyone have oil temp problems in their rebels. I live
in Olympia WA and the OAT seems to peak at about 70-75 degrees during the
summer. My oil temp at these temperatures stays right around 190-195.
However if the OAT reaches around 90 degrees I see 210 on my oil temp gauge.
This is at cruise (2300-2400 rpm.) I am curious as to what oil coolers
people are using that fly in hotter temperatures.

Thanks Brian

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rebel · Post by **rebel** » Fri Feb 17, 2012 10:37 pm

Hello,
I would like comments about wether the oil cooler lines should be tied to
the engine mount shortly after leaving the oil cooler. It seems to me as
though they should be attached to the engine mount so that the vibration from
the engine will not be transferred to the oil cooler fittings. Also is there
an "in" and "out" on the Niagra oil cooler? Is there a preferred connection
scheme for the hoses? Lycoming O-320-E2D, no fuel pump.
Thanks,
Good luck, you'll need it
Rick D.
Rebel 404R

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Robert and Olga Johnson · Post by **Robert and Olga Johnson** » Fri Feb 17, 2012 10:37 pm

Hi Rick. When I connected my oil cooler, I put the in line at the lowest
fitting for two reasons. 1/ air bubbles will always flow up and out. and 2/
heat rises. Just make sure you match the out line of the filter unit. Bob -
Rebel "652"

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Rebflyer · Post by **Rebflyer** » Fri Feb 17, 2012 10:37 pm

Hi Rick, I believe you want to let the oil lines "float" for a distance that would allow the necessary flex for the motion of the engine mounts. If you tie it to close, the constant motion is then transfered to the fittings. Vibration is not really a factor in an fittings of that size, as long as there is not an undo amount of weight hangng on it. If you feel that is a problem, then clamp either to the engine itself, or to a clamp on the firewall. As a side note, it has been found to be a problem if lines are zip tied to the motor mounts as they do move and it may cause undo wear on the mount. The zipp tie acts like a saw.
It's a good rule of thumb to give everything room to float a little, to allow for the vibrations. IMHO Curt N97MR

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Drew Dalgleish · Post by **Drew Dalgleish** » Fri Feb 17, 2012 10:37 pm

Hi Rick
You don't say where your cooler is mounted. I started with my oil cooler
on the firewall with a 4" scat hose feeding it but I wasn't getting enough
air flow and had to move it to the rear baffle. My remote filter is an
aftermarket volkswagen bug unit thats mounted on the firewall. The oil goes
to the filter then to the bottom of the cooler and back. The only hose I
supported is the long one between the filter and the cooler.
Drew

At 07:19 AM 12/27/2002 -0900, you wrote:

Hello,
I would like comments about wether the oil cooler lines should be tied to
the engine mount shortly after leaving the oil cooler. It seems to me as
though they should be attached to the engine mount so that the vibration

from

the engine will not be transferred to the oil cooler fittings. Also is there
an "in" and "out" on the Niagra oil cooler? Is there a preferred connection
scheme for the hoses? Lycoming O-320-E2D, no fuel pump.
Thanks,
Good luck, you'll need it
Rick D.
Rebel 404R

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rebel · Post by **rebel** » Fri Feb 17, 2012 10:37 pm

Thanks to all respondents,
My oil cooler is mounted on the left side of the firewall in the same
manner as Wayne O. has shown in pictures.The cooler will be fed with 3"
scat tubing. I believe this will be enough cooling as I have modified the
cowling to give good exit flow and the infeed is fed with a smooth sheet
metal transition. See pictures posted under Rebel cowl. If not enough I will
put a NACA vent in the side of the lower cowling half and feed it from
there. Before I'm done I may do that anyway. I like the idea of keeping most
of the airflow over the cylinders.
It would help if I knew which port on the accessory case was "in" and
which one was "out". If anyone can point that out to me I would appreciate
it. There is a 3/8 NPT port in the center of the engine below the oil
filter, and another one on the upper left side just behind the breather
port.
I have seen the "saw like" effects on many engine
mounts with ty-wraps attached. I cringe everytime I see it. It is amazing
how many people, from A&P's to homebuilder, still do it. Two rubberized DG
clamps are the way to go.

Rick D.
Rebel 404R (finishing firewall forward stuff)

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Walter Klatt · Post by **Walter Klatt** » Fri Feb 17, 2012 10:37 pm

I just had a look at my Lycoming manual. The one on the
upper left by the breather is the "oil from cooler"
port and the centre one below the oil filter is the
"oil to cooler" port.

Walter

-----Original Message-----
From: mike.davis@dcsol.com
[mailto:mike.davis@dcsol.com]On Behalf Of
rebel@dcsol.com
Sent: Saturday, December 28, 2002 7:17 AM
To: murphy-rebel@dcsol.com
Subject: Re: oil cooler

Thanks to all respondents,
My oil cooler is mounted on the left
side of the firewall in the same
manner as Wayne O. has shown in pictures.The
cooler will be fed with 3"
scat tubing. I believe this will be enough
cooling as I have modified the
cowling to give good exit flow and the
infeed is fed with a smooth sheet
metal transition. See pictures posted under
Rebel cowl. If not enough I will
put a NACA vent in the side of the lower
cowling half and feed it from
there. Before I'm done I may do that anyway.
I like the idea of keeping most
of the airflow over the cylinders.
It would help if I knew which port on
the accessory case was "in" and
which one was "out". If anyone can point
that out to me I would appreciate
it. There is a 3/8 NPT port in the center of
the engine below the oil
filter, and another one on the upper left
side just behind the breather
port.
I have seen the "saw like" effects on many engine
mounts with ty-wraps attached. I cringe
everytime I see it. It is amazing
how many people, from A&P's to homebuilder,
still do it. Two rubberized DG
clamps are the way to go.

Rick D.
Rebel 404R (finishing firewall forward stuff)

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rebel · Post by **rebel** » Fri Feb 17, 2012 10:37 pm

Mike Davis,
I goofed again. Please move the three new pictures that I uploaded and
move them from area 2 (software) to area 32 (Rebel - engine)
And by the way, the lower hose shown from the oil cooler to the engine is 22"
long from absolute end to end.

Thanks,
Rick D.
Rebel 404R

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Del Schmucker · Post by **Del Schmucker** » Sat Feb 18, 2012 10:43 am

I am wondering what oil cooler people are using on their O-320? My oil
cooler on my Subaru isn't quite big enough and am looking at options.

Thank you,

Del Schmucker
Information Systems Manager
Keewatin-Patricia District School Board

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carol and murray cherkas · Post by **carol and murray cherkas** » Sat Feb 18, 2012 10:43 am

Del:

IMO go to Van's site. They have Stewart Warner and Politec. Good Price. Get
a 7 baffle cooler not a 6 baffle and you'll never have a problem.

Good luck
Murray
Rebel 505

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Jesse Jenks · Post by **Jesse Jenks** » Sun Feb 19, 2012 5:58 pm

Date: Tue, 19 Jan 2010 12:51:26 -0800
From: rtpalmer@shaw.ca
To: rebel-builders@dcsol.com
Subject: Re: [rebel-builders] #80 sash chain

Thank you.
Bob

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