
09-13-2006, 10:36 AM
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CC Member
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Join Date: Apr 2005
Location: Near Chattanooga,
TN
Cobra Make, Engine: SPF, 418 Stroker
Posts: 220
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Not Ranked
AN Fitting Leak
I hooked up my oil cooler a couple of weeks ago, and there is a persistent small leak at one of the connections to the cooler. It's the standard SPF setup with AN-10 90 degree fittings at the cooler connection. I've tightened to about 12 ft-lbs, which I found recommended as the max torque for -10 fittings. Still leaked, so I added a soft aluminum cone (similar to Earls Conoseal; got it at a local aircraft shop) on top of the tapered nipple on the cooler. Still leaks. I can't see any imperfections on either the 90 deg fitting or the cooler nipple. I know the threads are not supposed to form the seal, but I'm considering adding some teflon tape or something similar. Suggestions, anyone?
Thanks a bunch.
Jerry
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