Heating copper to 825 degrees F will fully anneal it (to its softest
state). A dull red color is far hotter than 825. Perhaps it would be
less trouble to lay the washer on the element of an electric stove, and
leave it there for 2-3 minutes with the 'burner' set on 'Hi'. Careful
not to upset the significant other with this approach. It is correct
that the rate of cooling does NOT matter.
Greg
Eric J Russell wrote:
Consider annealing the copper washer. I have found that even 'new'
copper washers are not always soft. And with use the copper will work
harden & become unable to conform to the small irregularities it is
meant to seal.
String them on a stiff wire, heat with a propane torch until they glow
dull red. Let cool (I have read that quenching in water or letting
them cool slowly in air gives the same result). If starting with a
'used' washer smooth off any burrs/ridges first with fine sand paper.
Eric Russell
Mebane, NC
----- Original Message -----
Date: Thu, 5 Jun 2014 11:57:20 -0400 (EDT)
From: [email protected]
Subject: [alfa] Leaking oil drain plug
Can anyone give me a tip or some advice - I just can't seem to stop that
irritating drip of oil that comes from my plug, and my mechanic says
he's
doing the best he can!
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