Fuel Pump Research

[x66 714]

I'm seeing more & more discussion about fuel pumps & realize we need to know more. I've been researching fuel pumps through as many avenues as I can think of. I've created a list that Kurt will share. What I need is more input from anybody that might have original pumps. The part number, date code & known exact application and car build date would be wonderful. Information from just the flange only will always help. The picture is Guy Youngdell's original pump from his 12k miles 375hp April 1969 Built.

Assm line pumps & early NOS pumps will have a 2 letter code. The 1st letter is the month A-L indicating A=January etc. The 2nd letter indicates the year F=1966, G=1967, H=1968, I=1969, & J=1970.
Starting in 1971, pumps had Julian dates 1-365 followed by a letter. K=1971, L-1972, etc.  123K40727 would be May 3rd 1971....

Thank you, Joe 

[KurtS]

[x66 714]

Thank you for adding the chart....Joe

[jdv69z]

HH40669 pump from my 69 Z/28 10B build Oct 68

[Danzo]

DI40669  April 1969  05A Z28

[mgreenz]

Glad to see this topic being covered. Question about the list that Kurt posted for Joe. Is the Part Number an AC number? I ask because I have a NOS AI40524 pump that shows the GM p/n 6416886 on the box. With a partswiki search I found that the 40524 pump is listed in the Nov 68 Parts Catalogue for 1969 307 and 327 as well the 67/68 small block 4V. A photo of the page is attached but is likely hard to read. Something else thats probably hard to see in the first photo is that the AC logo is upside down. Hoping that’s just an anomaly.

[x66 714]

Thanks Terry. That was one of the numbers I got from the assm manual & never found it in the parts books. It's interesting that GM gave it a different sales part number but has 1/69 date code. Thanks for sharing....Joe

[mgreenz]

Your welcome Joe, happy to contribute where I can.
Here’s a service dated BA40524 AC fuel pump I picked up a while ago. Probably not of much value to this research topic but it does indicate availability into the late 80’s if I’m reading it correctly. (Feb 1987). It does have the 2 vent holes and the 3/8” inlet.

[x66 714]

Thanks Terry. I read that as much earlier but I could be wrong. I know in 1971 they started julian date & a single letter for the year. The data is helpful as as it says these pumps existed even if not during the years of 1st gen Camaros....Joe

[camaronut]

Do you think its a good idea to use a NOS fuel pump that's over 50 yrs old?  I'm thinking not.......
The rubber bladder has to be dry-rotted by now......I would think.

[mgreenz]

I'm thinking that your correct. It's occurred to me that if I was to use a NOS fuel pump it should be rebuilt. My understanding is that Fred Ballard is the go to guy for crimp style fuel pumps.


Here's an opinion that I saved from an ebay listing:

GOATHILL CLASSICS
All ORIGINAL, and CORRECT AC Fuel Pumps have two 1/8” (.125) vent/weep holes
in the AC housing located above the Diaphram so that WHEN the diaphram FAILS,
the Gasoline will be vented OUTSIDE of the Fuel Pump. Check ALL of the Asian,
Offshore, PHONEY Domestic Fuel Pumps for these two Vent/Weep holes!!
Without these two Vent/Weep holes the the Gasoline WILL contaminate the
Crankcase, resulting is CATASTROPHIC Main and Rod Bearing FAILURE !!

[x66 714]

Goathill no longer has the parts to rebuild them & at last conversation he doesn't know where, when or if he will have the parts. I orders a 40524 pump from him in Feb 2021. Still don't have it. He did cash my check in March of 2021
Fred is a little back logged also as he is taking care of family which always comes 1st. Fred has 2 of my 40524s...Joe

[mgreenz]

Thanks Joe. Good to know. I think I'd be more comfortable going with Fred.

[camaronut]

I bought a fuel pump from The Parts Place a few years back that looked identical to the "correct" AC fuel pump.  Had the casting spot on with the AC logo on it - just no 40669 stamping on it.  Maybe they still have some left in stock.

[rare396bronze]

F1140524 68 06B 327/210