The rebuilt 4656 AC Delco fuel pump in my '62 has leaked every Spring for the past 3 years upon starting the car after its 5 month Winter layover. Scares the heck out of me. I hate raw gasoline spilling onto hot exhaust pipes inside my tiny garage. By the time I get to check the pump, there's gas everywhere. Hard to see where exactly it's leaking. But it seems to be from the lower portion of the pump. The one held on by the 2 cap screws.
Every Spring, I overtighten all 10 of the cap screws round the top portion of the pump; the gas line fittings; and, the 2 cap screws on the bottom. The leaking stops. The screws are not all that loose to begin with. But they can stand a little tightening. Don't know what the torque values there are, but I suspect I'm overtightening them. But it works.
The gasket on the bottom portion of the pump is something that is black and contains yellow lines running through it. The pump is stamped "4656", but the stamping looks suspect. It is embossed "AC" where it should be.
I leave gas in the line over the Winter. But there is a shut-off petcock in line. So if the gas were to evaporate in that chamber, it would not be replenished.
Thing is, I don't trust the pump now. Has anyone else had this problem with a C1 or C2 fuel pump?
Every Spring, I overtighten all 10 of the cap screws round the top portion of the pump; the gas line fittings; and, the 2 cap screws on the bottom. The leaking stops. The screws are not all that loose to begin with. But they can stand a little tightening. Don't know what the torque values there are, but I suspect I'm overtightening them. But it works.
The gasket on the bottom portion of the pump is something that is black and contains yellow lines running through it. The pump is stamped "4656", but the stamping looks suspect. It is embossed "AC" where it should be.
I leave gas in the line over the Winter. But there is a shut-off petcock in line. So if the gas were to evaporate in that chamber, it would not be replenished.
Thing is, I don't trust the pump now. Has anyone else had this problem with a C1 or C2 fuel pump?
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