[Diy_efi] GM Fuel Pump / Tank Options

[James Panter]

This subject is going on and on.  If a sincere effort is being made to weld 
plastic then it's a common practice with body shops and the information is 
readily available on the internet.  The varous families of 
plastics--Polyurethand, Polypropylend, Polyethylene, Polycarbonates, Nylon, 
and ABS (Acrylonnitrile Butadiene Stryene) all have specific rods to weld 
the material.  Using the original parent material may not work because it is 
not virgin material.  In some cases it will work but not in all cases.  To 
weld it properly, identify the material, get some new welding rod, and melt 
it to the proper temperature.  Of course, all good welding practices 
apply---grooving, cleaning, etc.
Jim
----- Original Message ----- 
From: "Gregg Eshelman" <g_alan_e at yahoo.com>
To: <diy_efi at diy-efi.org>
Sent: Wednesday, August 29, 2007 3:09 PM
Subject: Re: [Diy_efi] GM Fuel Pump / Tank Options


> --- Clair Davis <clair.davis at charter.net> wrote:
> <clip>
>> Would it be possible, or even necessary, to do a bit
>> of plastic welding on
>> the poly fitting to make it that much of a tighter
>> fit?
>
> Fittings on rotationally molded tanks are attached by
> first cutting a hole then spin welding the fitting.
>
> The fitting is held in a chuck attached to a motor,
> then pressed against the tank and spun until friction
> melts a bit of the fitting and tank.
>
> Try some experiments on a junk tank to see what'll
> work. A Yahoo search for spin welding plastic turnes
> up lots of info.
>
>
>
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