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1. 04:48 PM - Re: Oil Lines and Aluminum AN Fittings (John Evens)
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| Subject: | Re: Oil Lines and Aluminum AN Fittings |
I've used aluminum fittings successfully with oil coolers. Galling can
be a problem, but doesn't have to be. Aluminum AN fittings are hard
anodized, and oil coolers usually are not. As long as you use a good
thread sealing/lubricating compound, & don't over-tighten (most
important), you won't gall the threads. Bare aluminum against bare
aluminum is much more of a problem, but the anodized fitting can be
successfully used with aluminum that is not. The admonition to use
steel fittings on carburetors, oil pressure lines, etc. is definitely
rooted, at least partially, in the fact that there is a lot of
vibration on & around an engine, and steel is much stronger, heat
resistant, & less prone to fatigue and cracking.
Brass also work hardens & can be prone to cracking. Anodized aluminum
is fine as far as compatibility with fuel is concerned.
John Evens
Time: 07:08:51 PM PST US
Subject: Re: Kitfox-List: Oil Lines and Aluminum AN Fittings
From: Michael Kraus <n223rv@wolflakeairport.net>
Actually the issue is aluminum fittings on an aluminum oil cooler will
gall a nd bind together making the fittings impossible to remove. If
you try, it s trips the threads on the oil cooler. I lost a $200 oil
cooler trying to re t ighten the fittings.
Sent from my iPhone
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