Date: Thu, 4 Oct 2012 07:27:58 -0700
Reply-To: James Flournoy <fleurdnoix@HOTMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: James Flournoy <fleurdnoix@HOTMAIL.COM>
Subject: Re: How to fix a leaking banjo fitting
In-Reply-To: <vanagon%2012100311252962@GERRY.VANAGON.COM>
Content-Type: text/plain; charset="iso-8859-1"
ditto on my comment about Hylomarbrakes and fuel lines are a whole different story- new washers always, especially on fuel
> Date: Wed, 3 Oct 2012 11:07:13 -0400
> From: email99@BELLSOUTH.NET
> Subject: Re: How to fix a leaking banjo fitting
> To: vanagon@GERRY.VANAGON.COM
>
> Alistair,
>
> I don't wish to drag this out longer but my comments were only for emergency
> recovery of some very low stressed sealing washers, not bending larger
> aluminum pipe. I make no suggestions on how to handle larger pieces of
> aluminum.
>
> I would, however, like to point out that at least one internet source of
> unknown reliability ("Annealing" section of http://www.mlevel3.com/BCIT/heat
> treat.htm) recommends "Cool at uncontrolled rate in air" to anneal "Cold
> Worked Materials" of 6061 alloy. For "Heat Treated Material" slowly cooling
> at "28°C per hour from the annealing temp down to 260°C. Subsequent rate is
> unimportant." is recommended for 6061 alloy.
>
>
> I don't have anything else to contribute to this thread.
>
> Thanks for your comments,
> Ed
>
>
>
>
>
> On Wed, 3 Oct 2012 07:06:16 -0700, Alistair Bell <albell@SHAW.CA> wrote:
>
> >I guess we we will just have to agree to disagree. I would heat the copper
> or Aluminium washers and quench them. Well, even Bob Hoover agrees
> (http://bobhooversblog.blogspot.ca/2006/11/vw-annealing-copper-washers.html)
> >
> > I'm going to be annealing sections of some 6061 1" pipe, either today or
> tomorrow, so that I can bend parts of it. A bit different than washers, very
> unwieldy for quenching, I'll see how it goes.
> >
> >cheers
> >
> >alistair
> >
> >
> >On 2012-10-03, at 5:36 AM, Ed wrote:
> >
> >> Alistair,
> >>
> >> Thanks for your comments.
> >>
> >> However, quenching is not required for annealing of these metals. Copper
> >> and aluminum may be annealed by heating and then either quenching OR cooling
> >> slowly. The behavior of some aluminum alloys may differ slightly according
> >> to their composition, but in general, this procedure applies.
> >>
> >> http://en.wikipedia.org/wiki/Annealing_(metallurgy)
> >> http://www.fournierenterprises.com/Annealing.pdf
> >>
> >>
> >> I still stand by my recommendation that copper and aluminum sealing washers
> >> should be replaced but, if necessary, their lifetime may be extended by the
> >> following procedure:
> >>
> >> "In an emergency you can remove the sealing washers and heat them with a
> >> propane torch, allowing them to cool without quenching."
> >>
> >> Regards,
> >> Ed
> >>
> >>
> >>
> >> On Tue, 2 Oct 2012 18:10:30 -0700, Alistair Bell <albell@SHAW.CA> wrote:
> >>
> >>> i'd agree that you could anneal to regain softness of washer but disagree,
> >> Ed, in your annealing method for aluminum and copper. Both those metals
> >> anneal by quenching, not slow cool.
> >>>
> >>> alistair
> >>>
> >>>
> >>>
> >>>
> >>> On 2012-10-02, at 2:46 PM, Ed wrote:
> >>>
> >>>> The sealing washers are probably work hardened and are no longer soft
> enough
> >>>> to make a good seal. Replace them as they are ideally one use items.
> >>>> That's why you get a new one for the oil plug when you buy an oil filter.
> >>>> In an emergency you can remove the sealing washers and heat them with a
> >>>> propane torch, allowing them to cool without quenching. This will restore
> >>>> the softness of both aluminum and copper sealing washers and allow them to
> >>>> seal without excessive force.
> >>>>
> >>>> Ed
> >>>>
> >>>>
> >>>> On Tue, 2 Oct 2012 16:02:38 -0500, JRodgers <jrodgers113@GMAIL.COM> wrote:
> >>>>
> >>>>> PS pump is leaking at the washer where the hollow bolt passes through
> >>>>> the banjo fitting on the pressure side. I made sure the bolt IS NOT
> >>>>> loose. So I need to do something. Any suggestions?
> >>>>>
> >>>>> Thanks,
> >>>>>
> >>>>> John
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