aslsa.rng(at)gmail.com
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 Posted: Thu Aug 06, 2009 11:23 am Post subject: Oil cooler leak, maybe not so much |
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It appears after disassembly that the oil cooler may be leaking at the fitting rather than at some undiscovered crack. I've looked with 20X magnifiers all around the base of the fitting where I thought the crack might be, but nada. The seal surface of the welded on 10JIC fitting however does seem to have an area of very limited contact view with the same magnifiers. Of course the welded in fitting keeps me from just getting a new fitting. Some blame may be laid on the vibration damper that the oil cooler shared with the muffler mount. As you can see from the pic, the spring that should connect the two steel mounts on each side of the rubber donut isn't. I can't find any evidence that there was ever a weld. The exhaust system kept the whole thing hanging together and hid the failure until I started disassembling things. I'll be looking for a through bolt kind of mount for this application and redo the oil cooler mount to use the Rotax radiator damper.
Rather than replace the oil cooler right now, I may try one of the Locktite miracle products to seal it until a better quality oil cooler. My gripe with the Mocal unit is A: fittings that can't be replaced and B: powder coating a device intended to dissipate heat means they have either too strong a marketing dept or idiots in the engineering dept. MHO.
So, if anyone knows of a specific product that would fix this leak, please forward. I've had good luck with the Locktite weld porosity sealer before and I'll use it again unless someone clues me into something better.
Rick Girard
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