[FC] Repairing Fuel Pumps

[Rad Davis]

Wow, you went a lot further with the screw tightening than I did.  My 
standard of measure is that if I can't stop the leak easily with a 
standard screwdriver that fits the screw, then something else is wrong  
and must be investigated.

I'll note that when I have experienced this problem, it was with pumps 
that had sat for months at a time between run cycles, and it was 
obviously related to the drying-out of gasket and diaphragm materials.

Glad to hear you've had good experience with the NAPA pump - it's been a 
long time since I've heard an actual recommendation for a corvair fuel 
pump from anybody...


Mikeamauro at aol.com wrote:
> :...if it's leaking from around the 'sandwich' of parts, you can 
> snug  the screws down to stop it..."  
>  
> I own three Corvairs; one is a van. The van has a  propensity to leak from 
> around the sandwich" parts. While a proponent of buying  from the Corvair 
> vendors, I've found their pumps to be consistent leakers. I've  reported the 
> problem, but with no relief. As a result I've gone to purchasing my  Corvair fuel 
> pumps from NAPA (part number: M3988); their pump is new (not  remanufactured), 
> has the internal damn designed to minimize fuel leakage into  the crankcase in 
> event of a diaphragm failure; their pumps are made in USA by  Federal Mogul, 
> and do NOT have a propensity to leak... been using for the past  two years with 
> good results. A tip: if using a pump that you are having to  continually 
> tighten the screws to stop leaking, add thread inserts (i.e.:  timeserts) into the 
> bottom casting: the pot metal threads give  (deform) too much for consistent, 
> reliable thread grip.
>  
> Mike Mauro
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