---------------------------------------------------------- RV-List Digest Archive --- Total Messages Posted Fri 03/28/14: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 08:33 AM - Oil Coolers (Bill Judge) ________________________________ Message 1 _____________________________________ Time: 08:33:12 AM PST US From: Bill Judge Subject: RV-List: Oil Coolers Yikes! Glad that hasn't happened to me! I've been blissfully running around for 900 or so hrs. I did a little looking around and it's been said that the SWs are tested to 180 PSI(off of VAF) and the Setrabs from what I can find are only tested to 145 PSI, max operating pressure is 174 PSI and design limit pressure is 536 PSI. http://www.setrab.com/products/proline/technical-specifications/std/ 1 Bar = 14.5 Psi. So 90 PSI shouldn't have been a problem but evidently it was. There is also some speculation that on startup Lyc Oil pressure surges very high, I could see this especially when it's cold. I'm in SoCal now but I was in DC for 4 years before that and started up on some 10 F mornings with no issues. I run about 72 PSI, 60 PSI would be better. Recommended range is 50-95 PSI according to the vantage engine manual which is pretty much the XP-360 that I have. Did it fail where the lines connect? Do you think there was any binding? I hadn't thought about the airflow difference. I've got 1/2 of it taped over anyway so it probably doesn't much matter. Bill > > > Time: 08:39:51 PM PST US > Subject: RV-List: Re: Oil Coolers... > From: "Laird" > > > Gary mentioned a failure in the past of the setrab oil cooler. That was > me back > in June 2000. There was a bunch of discussion then about it then. Would > recommend > searching that time frame in the archives. I'll copy my original post. > > Personally, I wouldn't recommend anyone to use one, but that's the great > thing > about homebuilts. You can do whatever YOU want. > > Laird > (and yes, I shouldn't have over flown a perfectly good airport, but that's > what > I did as the oil temp and pressure were still in the green). > > >From June 2000 > > #67570 > Date: Jun 02, 2000 > From: "Owens, Laird" > Subject: Setrab Oil Cooler Failure (long) > > Hi all, > > Yesterday on the 3rd flight of my RV-6, I had an interesting thing happen. > I was > out to break in my new 0-360 (and have a little fun) and out about 30nm > from > the departure airport, 5500', 2550 rpm just cruising along about ready to > turn > for a run back. I was going to do this back and forth thing for 2 hours to > let the motor work a little. > > I have a 16 row Setrab oil cooler mounted behind the #4 cyl on the baffle. > Setrab > oil coolers had been recommended in the past as a low cost alternative to > S/W's (see post from archives below). Oil temps have been consistent at > 225 deg > F (75 deg F ambient at 0 MSL). I was hoping that would come down a little > once > the engine broke in. Oil pressure had been stable at 90 psi. > > Just before I was going to turn, with about 3 hrs total on the tach, I > noticed > a little puddle of oil on the floorboard in front of the rudder peddles. > That's > weird.....I don't have any oil lines in under the dash.....OH @#$@! Oil > must > be leaking in the engine compartment and seeping thru the wire pass thru's. > I looked up just in time to see oil starting to come out of the upper > cowling > at the fuse/cowl junction. Oil pressure had dropped 5 psi, but was stable, > and temp was still 225. First, pull the power to 1800 and think. > > OK....decision time. I was just north of Valencia, about 15nm from > Whiteman or > Van Nuys, and about 17nm out of Santa Paula (gawd I love that GPS). Lots > of > houses between me Whiteman, and a river bed between me and Santa > Paula.....let's > see, if the engine fails, I can land on a house, or a river bed. That's a > no brainer. And if I can make Santa Paula, Camarillo is just around the > corner. > Maybe I can make it all the way back to home base...... > > I keep the power low, watch the oil pressure and temp and head for Santa > Paula > decending at about 200 fpm to keep the speed up while the motors still > running. > > I pass over Santa Paula at 2500' with good oil pressure so I decide to > press on > to Camarillo. Tower was helpful getting me on the ground quickly without > having > to declare the "E" word. > > I taxied back to the hangar and shut down. I climbed out to find oil > dripping > from the lower firewall to the tailwheel, on the side of the fuse and on > the wing > root and no oil on the dipstick. Guess it lost a little more oil than I > thought, > duh. What a mess in the "engine compartment formally know as clean". > > I pulled the cowl and cleaned up the airplane up (I'm sure the EPA would > like to > talk to me bout now....). > > The oil lines were tight, that only leaves the oil cooler. Pulled that > and put > an air nozzle to it. Sounds like a big hole up where the tubes get welded > to > the main plenum. > > Hello, Van's......Can I order a Positech oil cooler and have it delivered > over > night? Thank you. > > So much for trying to save a couple of bucks on the cooler. > > Just thought anyone out there with one of these might like to know about > it. I > hadn't seen any failure reports in the archives. > > Laird RV-6 (with a well lubed paint job) > SoCal > > >From the Archives: > > From: Mlfred(at)aol.com > Subject: Re: Oil cooler location & low cost option > Hi all: > > PLEASE don't think you need one of those expensive coolers on your bird! > Rob > Lee will tell you, and so will I. > I use a small & inexpensive ($65) cooler (with male -8 AN fittings already > installed) from TMR, Inc in Orange, Calif. (714) 771-1348. Talk to Mike > and > tell him I sent you ( he'll only charge you an extra 10%). The 19 row ($70 > "Setrab" brand- malmo in Sweden) unit I use on my Rocket keeps the temps on > the 540 to 185F in cruise, and I think I used a 13 row on the -4, and it > was > usually too much. Rob Lee has the exact part # for the 320/360 unit. How > about posting it, along with installation tips, Rob? > > I mounted mine on the back baffle, on the left side. I used the > expanding-slowing air/increasing pressure idea, and the inlet to the cooler > is sort of a reverse funnel. > > Check six! > Mark Frederick > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=421186#421186 > > ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message rv-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/RV-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/rv-list Browse Digests http://www.matronics.com/digest/rv-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.