ID this fuel pump for me please

[Chris E.]

Can someone tell me what model year C2 this goes to, and what engine configuration?

[William C.]

Re: ID this fuel pump for me please

it it is an AC, it should have a number stamped on it somewhere, no number-your guess is as good as anyones...

[Gerard F.]

Re: ID this fuel pump for me please

Chris,

Looks like a 40433, original to a 67 small block. It should have the number stamped on edge of the flange wich goes against the block.

Here's my original 40433 (refurbed of course) for comparison:



You can see the number on the flange. Yours seems to have the same fuel line fitting arrangement. Replacements just have a tube coming out the bottom for the inlet line.

On this one, I had my original fitting brazed to a replacement base.

[Rick S.]

Re: ID this fuel pump for me please

Jerry
Does your pump have "AC" on both sides? Here are 2 pictures of my pump.
Rick

[Gerard F.]

Re: ID this fuel pump for me please

Rick,

AC both sides:



Note the two vent holes closed on one side, but not the other.

Here it is, with the base being zinc plated:



One of the most complicated plating jobs I've done.

Here's the innards, if someone is interested:



Notice the holes in the base cup, that was the problem after all these years.

Rick, you missed a great convention. Met a lot of people and had lots of fun.

[Chris E.]

Re: ID this fuel pump for me please

Yup, I have AC on both sides. Thanks Jerry for your post. Looks like I have the original fuel pump for the car, and a correct Paragon replacement.

My original



Here is my original with my poor job of trying to replicate the coating on the bottom half of the pump, next to a new repop on the right side. Overall, I'm really pleased with the repop.

[Gerard F.]

Re: ID this fuel pump for me please

Chris,

Does the Paragon one have the correct fittings in the base. Can't see it in your picture.

Just wondering. Looks like you did a real nice job on your car.

[Chris E.]

Re: ID this fuel pump for me please

Chris,

Does the Paragon one have the correct fittings in the base. Can't see it in your picture.

Just wondering. Looks like you did a real nice job on your car.

Thanks!

Here are two more looks at the pair of fuel pumps.

[Gene M.]

Re: ID this fuel pump for me please

Jerry,
How did you get the pump back together? The rolled seam on the sheet metal cup looks good.

Where does one acquire the new internal parts to rebuild a pump?

You are a do it yourself kinda guy so I just figured you didn't send it out.

[Gerard F.]

Re: ID this fuel pump for me please

Gene,

A friend of a friend devised a recrimping machine and I sent this one out.

I sent him a new replacement 40503 for the innards plus my original. It got pretty complicated when my original had pinholes in the base, and he had to use the replacement base. He had to cut off the inlet tube and braze the inlet fitting from the original to the new base.

When I got it back, I zinc plated and dichromated the base.

This was at a time when a good 40433 repro was not available. With all the complication, if I had to do it now, I'd just buy the Paragon repro. But I had fun on this project.

The gentleman does not do this on a regular basis, but if you want to have it done, give me an email, and I will give you his contact information.
Make sure your original base is in good shape, or you will wind up with a complicated job like mine.

[Gene M.]

Re: ID this fuel pump for me please

Jerry,
He did a nice job roll forming the lip all around. Does he have a fixture for disassembly too?

The repop will receive deductions as the vent holes are different. Also the two added bosses at the rolled seam are in correct. A bit of finesse would/may go a long way on those bosses.

I'll contact you later on when I'm ready to redo mine. thank you

[Rick S.]

Re: ID this fuel pump for me please

Jerry,
Did you notice on my pump it had 7E before the 40433 and Chris's pump appears to have FF? What does your pump have and is it a date code? I assumed my 7E translated to May 67 as I have a June car.

As you say, "having fun".

Rick

[Gerard F.]

Re: ID this fuel pump for me please

Jerry,
Did you notice on my pump it had 7E before the 40433 and Chris's pump appears to have FF? What does your pump have and is it a date code? I assumed my 7E translated to May 67 as I have a June car.

As you say, "having fun".

Rick

Rick,

Mine has FG prior to the 40433 for a late June 67. I don't think it is a date code. I remember some discussion on this, way back and I think the consensus was that it was some kind of a vendor code.

Having fun,

[Gerard F.]

Re: ID this fuel pump for me please

Jerry,
He did a nice job roll forming the lip all around. Does he have a fixture for disassembly too?

The repop will receive deductions as the vent holes are different. Also the two added bosses at the rolled seam are in correct. A bit of finesse would/may go a long way on those bosses.

I'll contact you later on when I'm ready to redo mine. thank you

Gene,

I think he made his own tool for disassembly and recrimping. He sent me back my original base, and the decrimp looks good with only little tool marks at about 30 degrees around the inside periphery.

Of course, the repro base was decrimped from the 40503, and then recrimped to my original top. Too bad my original had rust pinholes through the bottom as it would have been reused, but glad he caught it.

[David L.]

Re: ID this fuel pump for me please

Rick,

Mine has FG prior to the 40433 for a late June 67. I don't think it is a date code. I remember some discussion on this, way back and I think the consensus was that it was some kind of a vendor code.

Having fun,

Jerry,

I believe your "FG40433" fuel pump is dated June 1967 where the first letter "F"=June and the second letter "G" =1967.
The "FF40433" pump would be dated June 1966 (for an "early" 1967).

I base this fuel pump date coding theory on research that I have done over the last 20 or more years on many used and NOS 1964-1966 Chevrolet & Corvette 4657 fuel pumps. The 4657 fuel pumps also have a 2-digit casting year with radial line segments (up to 12 of them, one for each month) around the year located in an "unfinished" hole near one of the outlets. I have many examples. My best example is a "4657EF" pump (May 1966) with "66" casting with 3 radial line segments (Mar. 1966) from a complete 1966 327 engine with casting 3858180, casting date "E 18 6", and stamped "T0521 HAR" that I bought about 1980. The engine was very original and complete with original Roch. 4-bbl. carb, distributor, heads, alternator, etc., with "matching" date codes.
1st letter, "A" = Jan., "B" = Feb., etc.
2nd letter, "E" = 1965, "F" = 1966, "G"= 1967
The 1963-1964 AC 4657 pumps did not have this code and were only stamped "4657".
The date coding in the 1970's and 1980 was different.

Dave