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Matt Dralle
Site Admin
Joined: 08 Nov 2005
Posts: 25203
Location: Livermore CA USA
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 Posted: Sun Oct 24, 2010 5:01 pm Post subject: Oil Cooler Mount Cracks - Replacement Follow Up... |
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Dear Listers,
First, let me say thanks to everyone that responded to my post regarding the oil cooler mount cracks. Lots of great feedback; I really appreciate it.
Rather than subject the Oil Cooler's mounts directly to the mounting screw's tension, I decided to craft some angle brackets that much more evenly distribute the load over the original mount. I made a set for the front and back of the rear mount and a single top bracket for the front mount that would sandwich the Oil Cooler mount to the rear baffle. I very carefully trimmed the tube spacers to exactly fit between the front and back brackets; much more precisely than the original installation. The inside rear Oil Cooler mount got the requisite top and bottom notching to clear the engine mount and this time I hogged out a bit more to give even better clearance. (A couple of people noted the scratches on the motor mount near these original notches; I believe these were from when I was filing the original oil cooler, I got a little over zealous and scrapped the power coat; I don't believe that there has been any incounters between the oil cooler and the mount due to engine shake.) I also added a few more rivets on the flanges between the rear and left-rear baffle sheet metal pieces.
To absorb some of the engine vibration, crafted a "gasket" of sorts from the same rubber material the baffle seals are made of. This really seem to nicely isolate the Oil Cooler from the baffle/engine.
Finally, I crafted a sweet stabilization strut from aluminum tube stock to form a brace from the engine to the top of the rear engine baffle. This made a HUGE difference in the overall stiffness of the oil cooler and I'm hoping will be the final modification in solving this Oil Cooler cracking issue.
Thanks again for all the feedback!
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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 Total Time Since May 2 2010 Test Flight!
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Matt Dralle
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gcomfo(at)tc3net.com
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| Posted: Mon Oct 25, 2010 12:34 pm Post subject: Oil Cooler Mount Cracks - Replacement Follow Up... |
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