' 63 4657 fuel pump

[Michael H.]

Re: ' 63 4657 fuel pump

Michael, My water pump is casting number 3859326. According to the JG, this is correct for all but early build 63 L84's (mine's an April build). Please note that this pump is not the original one (I don't know what casting the original pump was), so it should not be used as evidence of actual build patterns.

Mike

Ok, thanks Mike. If ya happen to run across a reasonably priced 3782609 water pump in your travels, grab it. It would be/is correct for 63.

[John D.]

Re: ' 63 4657 fuel pump

You are correct. This pump was not dated. They are not the easiest to find either.

The 4657 pumps are definitely dated as mentioned above. But once it's on the car next to impossible to read. The one on my car is Nov 62. The box has Nov 62 also.
99% of the 4657 pumps I see on the auction sites are service replacements for 63. Dr. Chuck's pics are very helpful for us. The SR pumps really stand out as being incorrect for a 63.

There is more to judging AC pumps than the fact they have the AC logos on. Hardest thing is checking the 4657 number. Most of the restored 63 engine compartments I see have a service replacement pump with a suffix after the 4657 & the frog pads. In fact ALL of them I have looked in the last couple of years had the replacement pump. Except for one little white car. (LWC).

[John D.]

Re: ' 63 4657 fuel pump

Mike, I once said on a post here that you can't tell if a 63 has a 609 or a 326 water pump unless you look at the number with a mirror. Well I was quickly corrected on that statement. The configuration of the two pumps is different. Once you learn this you can just about walk on by a car and just glance at it to see if it has a 609. The configuration of the boss for the bypass fitting is the big difference. By the way make sure you have the correct bypass fitting that has little diamond logos on the side of it. There is a repro of this fitting that is close to the original. The ones that were sold by Chevy since the late 70's on are just plain jane fittings with no logos.(discontinued) But you didn't ask this. JD

[Michael G.]

Re: ' 63 4657 fuel pump

I assumed from your posting, Michael, that he JG is wrong on the correctness of the of the 326 pump for my engine, so I went back in the achieves to read some of your earlier posts for a further understanding. Thanks, I guess I better try to find a 609 pump now, before I assemble it.

I'm trying to put this engine in the car in two weeks and I've checked few places and can't find a 609, (these parts were not nearly as big a problem to find the last time I rebuilt a 63 L84 engine, back in 1970). if you've got any ideas as to where to find this pump, please email me ( I hope its OK to ask for this kind of assistance here; if not some body please let me know).

By the way, John, there are diamond logos on my by-pass fitting.

Thanks, Mike

[Michael H.]

Re: ' 63 4657 fuel pump

I assumed from your posting, Michael, that he JG is wrong on the correctness of the of the 326 pump for my engine, so I went back in the achieves to read some of your earlier posts for a further understanding. Thanks, I guess I better try to find a 609 pump now, before I assemble it.

I'm trying to put this engine in the car in two weeks and I've checked few places and can't find a 609, (these parts were not nearly as big a problem to find the last time I rebuilt a 63 L84 engine, back in 1970). if you've got any ideas as to where to find this pump, please email me ( I hope its OK to ask for this kind of assistance here; if not some body please let me know).

By the way, John, there are diamond logos on my by-pass fitting.

Thanks, Mike

Well, I'll put it this way. The folks that made the original castings for water pumps, "Grey Iron Works", didn't even have the 326 number in their system until some time in very late 1963.
I'm not sure when it finally became a casting, or a complete water pump on the Flint engine assembly line but I think we can conclude, with certainty, that none were in existance prior to probably some time in mid 1964.

I have some paperwork from "Grey Iron" here somewhere. If I can dig it out, I'll post it. Pretty sure it was posted a few years ago but I can't seem to find it now.
I think Joe Lucia had some of that same paperwork so if I can't dig mine out, hopefully he has a much better filing system than I do. (pretty sure everyone has a better filing system than I do)

[Gerald C.]

Re: ' 63 4657 fuel pump

To all,I have a 10/31/62 f/I car and I have a 609 water pump. In addition, my fuel pump is 4657 BF. Does the BF state that it is a service replacement back when?Thanks,Jerry

[David L.]

Re: ' 63 4657 fuel pump

To all,I have a 10/31/62 f/I car and I have a 609 water pump. In addition, my fuel pump is 4657 BF. Does the BF state that it is a service replacement back when?Thanks,Jerry

Jerry,

I did a lot of research on AC fuel pumps (refer to link below). IMO your AC pump was made Feb. 1966 ("BF"). The 1963 and 1964 AC 4657 fuel pumps did not have this stamped date code. Near the threaded outlet hole there is another non-threaded hole with a 2-digit year casting (either "65" or "66" in your case unless the pump was rebuilt where parts get all mixed up) with 1 to 12 radial hash marks (Jan. to Dec.). You may need to use a magnifying glass.

Dave

https://www.forums.ncrs.org/showthread.php?84774-AC-fuel-pump-date-code-research-data&highlight=ac+fuel+pump+date

[Gerald C.]

Re: ' 63 4657 fuel pump

Dave,Thanks for your feedback. I'm having my fuel pump rebuilt and then will sell it to someone with a 66. Then I'll by a straight #4657.Thanks,Jerry