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Re: Fuel Pump-53 Cavalier
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That's the vacuum half of the pump. As you can see, it's cast so that fittings can be installed on whatever side. If you really want to, you can drill and NPT tap another port. Likely the pump was originally from another car and whoever rebuilt it (or bought it pre-rebuilt) did just that, and then just plugged the originals.
Posted on: Yesterday 21:32
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1955 400 | Registry | Project Blog
1955 Clipper Deluxe | Registry | Project Blog 1955 Clipper Super Panama | Registry |
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Re: Fuel Pump-53 Cavalier
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These were originally just a flat boss that someone has drilled and tapped for whatever reason.
Posted on: Yesterday 23:40
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Re: Fuel Pump-53 Cavalier
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Was it like that when you sent it for rebuild? Possibly it was to remove stuck check valves but drilling like this seems overkill especially using the huge plugs rather than the small, more subtle Allen head type!
Posted on: Today 0:26
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Re: Fuel Pump-53 Cavalier
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I rebuilt the pump myself, so if it was to remove stuck valves it was sometime in the past. But as you mentioned, it sure seems like overkill. Maybe it was rebuilt in the past and someone buggered up the top and replaced it with one that had the lines coming off the top, so they changed them to the side?
Posted on: Today 0:56
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Re: Fuel Pump-53 Cavalier
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I never saw one with lines from the top on this type of pump but that doesn't mean they didn't exist. As humanpotatohybrid pointed out, they were designed for the lines to the front or to the rear only and I would expect if there were a top option, it would have knockouts there too.
Posted on: Today 1:43
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Re: Fuel Pump-53 Cavalier
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A 56 T bird pump has lines on the top, for example. Common when using barbed fittings (soft lines) instead of elbows.
Side note, I can't imagine the check valves being so stuck that they would need pressed out from the back. In my experience, they are flimsy enough to tear apart in situ with a common screwdriver if you wanted to.
Posted on: Today 4:48
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1955 400 | Registry | Project Blog
1955 Clipper Deluxe | Registry | Project Blog 1955 Clipper Super Panama | Registry |
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Re: Fuel Pump-53 Cavalier
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Quote:
That the pump, or maybe just the top, is off another car that had the ports on the top would seem to make the most sense. And yes, popping out the valves takes very little effort. These ones didnt even have any stake marks. This pump has clearly been apart before, which is not surprising, as it had some mismatched washers on a few of the screws. If I could find out who owned the car from 1984-2023 I could learn more about it's history, but that 40 years along with the car's first 10 years are still unknowns. 
Posted on: Today 9:41
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Re: Fuel Pump-53 Cavalier
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Quote:
A 56 T bird pump has lines on the top, for example. Common when using barbed fittings (soft lines) instead of elbows. Side note, I can't imagine the check valves being so stuck that they would need pressed out from the back. In my experience, they are flimsy enough to tear apart in situ with a common screwdriver if you wanted to. I was referring to this specific type and style of pump that used the same castings and I don't think the Thunderbird uses one like this. As far as tight check valves, the kit I bought for my 1956 Clipper's Carter pump had such tight valves that they will probably have to be broken out the next time. I never got any that were so tight and the company said that's the way they're supposed be. News to me!
Posted on: Today 11:27
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