---------------------------------------------------------- RV-List Digest Archive --- Total Messages Posted Mon 10/18/10: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 08:36 AM - Oil Cooler Mount Cracking... (Bill Judge) ________________________________ Message 1 _____________________________________ Time: 08:36:54 AM PST US From: Bill Judge Subject: RV-List: Oil Cooler Mount Cracking... Matt, I had the same type of cracking on my oil cooler after about 60 hrs. I got rid of my standard oil cooler and used a setrab 10 row with swivel angle fittings. http://www.hrpworld.com/index.cfm?form_prod_id=276,587_823&action=product http://www.hrpworld.com/index.cfm?form_prod_id=276,587_3397&action=product It comes with straight in AN fittings but I swapped them out with one 90 and one 45 because that seemed to be the direction that the lines wanted to enter the cooler. I was able to used the standard lines and just make some mods to accept the setrab cooler. I also beefed up the bracing around the cooler with 0.125 angle rather than whatever is standard. The cooler is about 1/3 the size of standard and so there is much less weight hanging on the baffles. The firewall solution works fine but I really didn't want to have the hoses "working" with the vibrations/shaking of the engine. 550 hrs now and no cracking and my oil temps never get above 200F. The best part is that I was able to sell the standard oil cooler on ebay for enough to cover the cost of the new cooler and fittings. Bill Judge N84WJ RV-8, 550 hrs rv-8.blogspot.com > > Time: 07:14:56 PM PST US > From: Matt Dralle > Subject: RV-List: Oil Cooler Mount Cracking... > > > Dear Listers, > > I took the cowling off the 'ol RV-8 today to have a look around at about > the 112 > TTSN hour mark. Most everything looked okay except for one major issue. > The > outside, lower back mount on the oil cooler is totally cracked off. The > outside, > lower front mount also has a long crack. At this point, the upper part > of the mount seems alright. Also the inside mounts show no signs of > cracks. > The rear flange on the baffling has a small crack where the left rear part > rivets > to the back baffle that the oil cooler is bolted to. No oil leaks of any > kind at this point. See attached pictures from my Cell Phone. > > So what the heck? The engine shakes quite a bit on startup and shutdown > (smooth > as glass during normal ops), but this doesn't really seem like rotational > shake > damage. Although, it must be. Obviously I'm going to have to remove the > oil cooler and have it repaired (that can be done, right?). But just > "fixing" > the mounting flanges isn't going to solve the "problem". > > What are lister's opinion on what's going on here and what could be done to > prevent > it? > > Interestingly, I noted that the #4 grounding cable that is attached to a > bolt hole > right underneath the oil cooler also had the lug sheered off. There is > "service > loop" on the cable, but #4 isn't really flexible so its not particular > effective. Guess I need more. The point though, is, that it seems like > the engine > shook pretty hard. I don't see any other signs of "issues" related. The > mounts and bolts seem solid and tight. > > Thoughts? > > > - > Matt Dralle > RV-8 #82880 N998RV > http://www.mattsrv8.com - Matt's RV-8 Construction Blog > http://www.youtube.com/MattsRV8 - Matt's RV-8 HDTV YouTube Channel > Status: 112+ Hours TTSN! > > __ ------------------------------------------------------------------------------------- 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.