I've done a lot of work over the Winter to get my '62 ready for this Summer. One of the things I did was to replace the fuel pump with a mostly correct AC 4656. Got the engine running last weekend. When I went to start it today, the fan caused some fuel that had pooled on the top of the pump to splash around the engine compartment. Jeez that scares the hell out of me. I hate it when gasoline sprays around the engine compartment! Now I'm trying to decide how to fix this.
This is classic. This is how most of my projects go on this car. I fix or replace many items, and then I need to go back and redo it when one of them screws up. The one that screws up is usually the one that didn't need fixing in the first place. It was only "fixed" because of something else. The original project was to change the carb and to replace the rubber fuel line hoses with solid line. What the hey, while there might as well replace the generic pump with the right one so I can use the right fuel lines.
Fuel seems to be seeping out of the 2 little holes on the top of the pump when the engine is shut off. It then collects in the recesses of the pump. It didn't leak for the 20 minutes I ran the engine. It only leaked a little after I shut the engine off. After I wiped up he little fuel that did escape the second time, it didn't leak in the hour or so afterwards.
The fuel pump is an Ebay special. It was advertised and appears to be a rebuilt AC. It came in a box that had no markings other than "4656." It has "AC" on the top and bottom, but there is no stamping on the engine block mounting flange. The inlet and outlet were in the correct 4656 positions. (This is why I said mostly correct.)
I forget how I replaced the pump, but I remember it was horrible. Questions:
1. I know the pump is judged for the "AC" markings on the top and bottom, but is the "4656" judged? I don't see how any judge could see it.
2. What do those 2 little holes do? I would think that they are air relief/vent holes to allow the diaphragm to do its work. I'm thinking that these holes vent into the upper part of the fuel pump chamber. I'm also thinking that gasoline is supposed to stay under that diaphragm in the lower portion of that chamber. If gas is coming out of those 2 little holes, does that mean the diaphragm is leaking?
3. Any helpful hints on how to replace this pump?
This is classic. This is how most of my projects go on this car. I fix or replace many items, and then I need to go back and redo it when one of them screws up. The one that screws up is usually the one that didn't need fixing in the first place. It was only "fixed" because of something else. The original project was to change the carb and to replace the rubber fuel line hoses with solid line. What the hey, while there might as well replace the generic pump with the right one so I can use the right fuel lines.
Fuel seems to be seeping out of the 2 little holes on the top of the pump when the engine is shut off. It then collects in the recesses of the pump. It didn't leak for the 20 minutes I ran the engine. It only leaked a little after I shut the engine off. After I wiped up he little fuel that did escape the second time, it didn't leak in the hour or so afterwards.
The fuel pump is an Ebay special. It was advertised and appears to be a rebuilt AC. It came in a box that had no markings other than "4656." It has "AC" on the top and bottom, but there is no stamping on the engine block mounting flange. The inlet and outlet were in the correct 4656 positions. (This is why I said mostly correct.)
I forget how I replaced the pump, but I remember it was horrible. Questions:
1. I know the pump is judged for the "AC" markings on the top and bottom, but is the "4656" judged? I don't see how any judge could see it.
2. What do those 2 little holes do? I would think that they are air relief/vent holes to allow the diaphragm to do its work. I'm thinking that these holes vent into the upper part of the fuel pump chamber. I'm also thinking that gasoline is supposed to stay under that diaphragm in the lower portion of that chamber. If gas is coming out of those 2 little holes, does that mean the diaphragm is leaking?
3. Any helpful hints on how to replace this pump?
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