Today's Message Index:
----------------------
1. 08:36 AM - Oil Cooler Mount Cracking... (Bill Judge)
Message 1
| INDEX | Back to Main INDEX |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | 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 <dralle@matronics.com>
> 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
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|