[FC] Repairing Fuel Pumps

[Paul Steinberg]

My guess is that the compounds that the diaphragm are made of are 
deteriorating prematurely due to the compounds used to make gasoline today. 
Some of the new gasoline compounds can turn old rubber into mush in short 
order.  Product liability is probably the real reason for higher costs of 
replacement fuel pumps, and the lack of rebuilding materials.  I also doubt 
that any silicone compounds available today will make a permanent repair to 
your old defective diaphragms.

   Paul in CT

----- Original Message ----- 
From: "Scott & Cyndi Wilson" <scwilson8126 at wowway.com>
To: <corvanatics at corvair.org>
Sent: Thursday, November 06, 2008 5:43 PM
Subject: [FC] Repairing Fuel Pumps


> Hello All;
>
> I have had a couple of fuel pumps fail lately.  They did not stop pumping 
> gas, but started leaking from the 5 O'clock position (vent?) into the 
> engine compartment.
>
> One is a very old pump and the other was bought from a local auto parts 
> store 3-4 yrs. ago.  I'm guessing that the newer pump could be one from 
> the defective batch from a few years ago.
>
> I bought two new pumps from a corvair vendor that I know are good.
>
> What causes these leaks and can I repair them in order to use the old 
> pumps as spares in case I break down on the road?
> I was thinking of re-assembling the pumps using some kind of permatex or 
> silicone sealer between the gaskets.
>
> I'm surprised that nobody sells any kind of re-build kit for these since 
> new/rebuilt pumps are getting pretty expensive.
>
> Thanks,
>
> Scott Wilson
>
>
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