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XE-285 oil tank cap problem
#1
Is it possible that the 285 oil tank was never intended to hold petroleum products?

My cap gasket was swollen and ballooning away from the cap.  I made a replacement out of automotive rubber gasket sheet but it had to be 15mm smaller in diameter than the swollen gasket to fit into the cap.

I checked a recently re-engined XE here in the shop and it was just as bad.  Both are using the recommended Legend ZX-2SR oil.  Neither of the failed gaskets have more than a couple of hours of flight time, or a couple of weeks exposure to the oil.

I've attached a picture of a new cap, the gasket from mine (now somewhat dried out and flatter), and the other XE's cap.  The other shot is a close-up of a failed gasket.
       
Do you have a better solution than mine for everyone else?
-Chip-
N8421L Mosquito XE-285
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#2
Chip,

Mine only had an "O"-ring.
XE 285  1205 (Myrtle)
Start: 8/1/2013
Finish: 5/24/2014
Arrived home: 10/11/2014

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#3
Just checked mine, also swelling up pretty bad.  Guess I'm going to need a flat O-ring and replace.
Thanks for the heads up.
Dave
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#4
Yep, mine has done the same thing...


Sent from my iPhone using Tapatalk
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#5
Never noticed it before but the rubber liner clearly doesn't like the oil.  The tanks are supposed to be inert to chemicals.  I will find a suitable replacement but if anyone finds something let me know please.
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#6
This is what I'm using.

http://smile.amazon.com/Canton-Racing-Pr...detailpage


Kind of pricey, but it like it.
I wish the site tube was on the other side, but it's still easy to check.


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Lorne Diebel
MXE1106
Merritt Island, FL
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#7
I've seen Lorne's oil tank and it's classy and nicely engineered, but I prefer a translucent tank over a sight tube myself.

May I suggest that any replacement tank have an offset fill opening?  It's nearly impossible to refill the current one, mounted in the specified position, without making a mess.  Even using a plastic funnel is problematic.

Either that, or find a cap&spout that fits on the Legend oil gallon jug.
-Chip-
N8421L Mosquito XE-285
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