[FC] Repairing Fuel Pumps

[Rad Davis]

First: never use RTV in a fuel system: RTV is soluble in gasoline.  The 
stuff swells into gelatinous blobs which then plug everything up.

Second, if it's leaking from around the 'sandwich' of parts, you can 
snug the screws down to stop it.  This is common with pumps that are 
used infrequently and dry out between use cycles.  This sounds like what 
might be happening in your case.

If it's leaking through the diaphrams, it's basically junk.

Way back when, AC did sell a rebuild kit, but since the diaphragms are 
riveted to the pushrod and there's a cast aluminum disc in between, it 
was nearly as expensive as a whole pump.



Scott & Cyndi Wilson wrote:
> 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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