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1. 02:10 AM - Re: Oil Cooler Mount Cracks - Replacement Follow Up... (Hugh Ragg)
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| Subject: | Re: Oil Cooler Mount Cracks - Replacement Follow Up... |
Nice work, I am very interested in this as my RV7 is almost complete. I looked
at the oil cooler install and will have a very close look at modifying the installation.
Thanks for the valuable feed back
Regards
Hugh
On 25/10/2010, at 10:55 AM, Matt Dralle wrote:
>
> 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!
>
>
> -
> 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!
> <2010.10.17 - RV-8 - IO-390 Oil Cooler Mount Cracking (1).jpg><2010.10.17 - RV-8
- IO-390 Oil Cooler Mount Cracking (2).jpg><2010.10.24 - RV-8 - Oil Cooler
Replacement And Remounting (1).jpg><2010.10.24 - RV-8 - Oil Cooler Replacement
And Remounting (2).jpg><2010.10.24 - RV-8 - Oil Cooler Replacement And Remounting
(3).jpg><2010.10.24 - RV-8 - Oil Cooler Replacement And Remounting (4).jpg><2010.10.24
- RV-8 - Oil Cooler Replacement And Remounting (5).jpg><2010.10.24
- RV-8 - Oil Cooler Replacement And Remounting (6).jpg><2010.10.24 - RV-8
- Oil Cooler Replacement And Remounting (7).jpg><2010.10.24 - RV-8 - Oil Cooler
Replacement And Remounting (8).jpg><2010.10.24 - RV-8 - Oil Cooler Replacement
And Remounting (9).jpg>
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