Matt Dralle
Site Admin
Joined: 08 Nov 2005
Posts: 25204
Location: Livermore CA USA
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 Posted: Wed Feb 19, 2014 6:50 pm Post subject: RV-List: Oil Cooler's... |
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I thought the source of the cracking had been addressed. I had some issues with the left-rear baffle flange cracking too in the beginning. I made the rear baffle nice and strong, but used the stock left-rear piece which was .032. It just wasn't up for the task. I later added a cross strut from the crankcase just ahead of the hoist loop all the way back to the left rear corner and added some .063 angle stiffners over the oil cooler flanges for additional support. I'm wondering if I cracked the flange today taking the oil cooler off. It was pretty stuck on and I was having to do a fair amount of prying to get it to separate from the gasket. I would have been more careful if I'd of realized those flanges are made out of such crappy pot metal. Man, they are soft.
Since I'm rebuilding, I decided to rebuild the left-rear baffle part and was taking the oil cooler off today to accommodate that. That's when I noticed the crack.
Attached are some pictures of the setup prior to disassembly today.
Matt
At 06:10 PM 2/19/2014 Wednesday, Kelly McMullen wrote:
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I certainly recommend talking to Pacific Oil Cooler before you make any decisions. They can give you pricing to repair, and probably have a source for exact replacement as well.
On 2/19/2014 6:57 PM, Linn Walters wrote:
>If you just install another oil cooler .... my gut feeling is that it'll crack too. If it was mine I would have it welded .... you can't braze aluminum .... and figure out why the oil cooler cracked in the first place. My first choice is engine vibration, and the second is stress due to the baffle mounting flange not being flat.
>Linn
>
>On 2/19/2014 8:35 PM, Matt Dralle wrote:
>>Greetings RV'ers,
>>
>>On the RV-8, I've got Stewart/Warner 10610R 10 row oil cooler for the IO-390. It's mounted on the rear baffle and its worked well and kept the oil temps in the low 180's under all conditions.
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>>I noticed today, that the outside mounting flange that goes next to the baffle is cracked. I suppose I could get it welded or brazed or whatever they do to aluminium, but that seems like a hack.
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>>Apparently, Chief doesn't carry the Stewart/Warner brand anymore and has to different variants of the Aero Classic brand in the 10 Row 10610R compatible unit.
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>>One is the "Standard" model for $269:
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>> http://www.chiefaircraft.com/aircraft/oil-system-filters/oil-coolers/standard/aec-8000081.html
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>>The other is the "HE" (High Efficiency) models are $575:
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>> http://www.chiefaircraft.com/aircraft/oil-system-filters/oil-coolers/he-series/aec-8001646.html
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>>Any thought's on either of these two options? Pros and cons. The HE models look a lot like the S&W model I have, assuming the pictures are accurate.
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>>Thanks for the feedback.
>>
>>Matt
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Matt Dralle
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