renovator

This is the original fuel pump for my base 350, long story short during my restoration I discovered that the fuel pump was leaking between the top and bottom halves, pulled it apart and applied RTV as a gasket and put back together, seemed to work fine and no leaks. However, recently I am getting little "spurts" of fuel through these little "exit holes, pressure relief holes or whatever". Has anyone had this issue and been able to repair it? I would like to keep it original if possible but perhaps it is best to go to a new pump. My pump and the 2 little holes in question, the last pic is of 8 month old" correct fuel line" purchased from a well known vendor and it's condition already, bummer! It is already starting to break down, I use non ethanol fuel as well.
Thanks, Ron

Easy Mike

Some of the pumps are rebuildable and there kits for that purpose.

Paul L

That one seems to be bolted together so I would say yes, you can get a new diaphragm and rebuild kit. I had one of those on my 1967. The later crimped style as on my 1974 are throw-aways.

mikem350

Generally, RTV will be eaten away by gas

I have suffered the same problem with rubber parts from Corvette vendors

68/70Vette

The NCRS Driveline Magazine may have vendors that can restore the pump. NCRS=National Corvette Restoration Society. I belong to the NCRS even though I am not a pristine Corvette restorer. For working on a C3 and being completely in the information loop about these cars, you need to belong to the NCRS. It's not that expensive.

doorgunner

If worse comes to worse......you may be able to buy a similar aftermarket fuel pump and put the new internal parts into your original pump housing. If the internal parts fail before the warranty is up return the aftermarket pump with the failed internal parts reinstalled. A defect is a defect!

Be sure to inspect the pump rod for wear while you have the original pump out of the car.

doorgunner

Rookie question: Would the EFI fuel hose hold up better against ethanol diluted gas than "standard" fuel hose even though it would be over-kill pressure-wise?