AC fuel pump date code research data

Discussion in 'Original Drivetrain Topic' started by DCL70, Feb 25, 2011.

  1. DCL70

    DCL70 Veteran Member

    1,219
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    May 5, 2007
    Merrimack, NH
    I originally started this thread earlier today on the NCRS Forum. Many of the 1970 fuel pumps listed below are from members from this forum from an earlier thread. I started out researching STAMPED date codes on AC fuel pumps while I was doing a frame-up restoration of my 1966 Corvette from 1979 to 1995. This research still continues as my passion since 1990 has been the 1970 Camaro SS350.

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    Enclosed is research data that I have collected for many years studying the stamped date codes on factory installed AC fuel pumps.
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    AC re-buildable pumps (w/screws)
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    "4657" , "64" casting year w/3 hash marks (Mar. 1964)

    "4657KE" (Nov. 1965), "65" w/10 hash marks (Oct. 1965)

    "4657KE" (Nov. 1965), "65" w/9 hash marks (Sept. 1965)

    "6842KE" (Nov. 1965), "65" w/?? hash marks. NOS pump

    "6942LE" (Nov. 1965), from 1966 Chev. 283 "T1222GA"
    (Dec. 22, 1965)

    "4657EF" (May 1966), "66" w/3 hash marks (Mar. 1966)

    "4657EF" (May 1966), "66" w/4 hash marks (April 1966)

    "4657GF" (July 1966), "66" w/5 hash marks (May 1966),
    NOS pump

    "4657GF" (July 1966), "66" w/6 hash marks (June 1966), NOS pump

    "4657JF" (Oct. 1966), "66" w/10 hash marks (Oct. 1966)

    NOTE: I have a few "rebuilt" pumps that have dates that do NOT match because the rebuilders did NOT bother to match up the tops and bottom as these parts were mostly interchangeable.

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    AC crimped type pumps (non-rebuildable)
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    "FF40433" (June 1966), Early 1967 Corvette (VIN # 183)

    "HH40669" (Aug. 1968), 1969 Camaro Z28, "V0912DZ" (Sept. 12, 1968)

    "AI40503" (Jan. 1969), Service pump for 67 Corvette

    "DI40658" (April 1967), Pump from my non-original 1966 Corvette engine. Possibly from an "early" 1967 Camaro as pump # 5656858 was replaced by # 6440524 as per 1967 Camaro AIM (revision record, 2/1/67).

    "FG40433" (June 1967). Original pump on 1967 Corvette 327, VIN # 22049, engine dated June 29, 1967.

    "CG40433" (Mar. 1967), Believed to be an original 1967 Corvette 327 pump from a friend on mine in Richmond, VA.

    "LH40709" (Dec. 1968), Seems a bit too early for a 1970 LT1. "V0114CTU" (Jan. 14, 1970).

    "JI40777" (Oct. 1969), 1970 Camaro SS350, March 26, 1970 engine date (Nasty Z28 website).

    "DJ40726" (Apr. 1970), Original pump from 1970 Z28 made in Apr. 1970 (Nasty Z28 website).

    "DJ40726" (Apr. 1970), from 1970 Z28 (Nasty Z28 website).

    "?J40726" (???, 1970), from a 1970 Z28 made in Feb. 1970 (Nasty Z28 website).

    "LI40726" (Dec. 1969), from a 1970 Z28 (Nasty Z28 website).

    "LH40709 (Dec. 1968), Seems a bit too early for a 1970 engine stamped "V0702CTK" (July 2, 1970)

    "8K40709" (8th day of 1971), 1071 LT1 eng. "V330CGZ"
    (Mar. 30, 1971)

    "19K40770" (19th day of 1971), 1971 LS6 "T0227CPW" (Feb. 27, 1971).

    "219K40956" (219th day of 1971), 1972 Coupe (May 10, 1972).

    "215K40769" (215th day of 1971), Seems a bit late for a
    1971 eng. "V1201CJK" (Dec. 01, 1970).

    "197J40726" (197th day of 1970), from 1970 Z28 (Nasty Z28 website).

    "229K40956", (229th day of 1971 or Aug. 18, 1971), from 1972 Corvette LT1 engine.

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    I would appreciate it if anyone that still has the original AC fuel pump from his or her Corvette/Camaro/Chevelle/Nova would post the appropriate information on this thread.

    I am totally convinced that AC fuel pumps have a STAMPED date code incorporated into the stamped AC part number starting in 1965. I have never found a STAMPED date code on a 1964 or older AC fuel pump except on rebuilt pumps made with random parts.

    I hope the non-believers will at least keep an open mind to my stamped date code theory.

    Dave
     
    Last edited: Feb 26, 2011
  2. CamarosRus

    CamarosRus Veteran Member

    Great info Dave, I'll try to contribute later, when I can find my pumps and numbers.

    Can you post a few example pics of the 70+ A/C Delco pumps and numbers ??
     
  3. DCL70

    DCL70 Veteran Member

    1,219
    6
    May 5, 2007
    Merrimack, NH
    Chuck,

    You already have. You have a "LI40726" pump (Dec. 1969) from a 70 Z28 but I do not have the date from the block. You also have a "197J40726" pump (197th day of 1970). I started a thread about 1 year ago "Factory installed 1970 Z28 or SS350 AC fuel pump".

    I really do not have any pictures. I believe that there are photos of 1970-1972 Corvette AC pumps on the NCRS Forum. I still have a few used 4657 AC pumps and a NOS "058T40777" AC pump in a box dated Aug. 1977 for my 70 Camaro SS350 project. I sold all my NOS and used 4657 AC pumps back in the 1980's. Most of the data in my research is from others.

    Dave
     
    Last edited: Feb 25, 2011
  4. Gary S

    Gary S Administrator Lifetime Gold Member

    21,529
    424
    Apr 14, 1999
    Bismarck, North Dakota
    You have one listed there that might be mine. My SS350 engine was assembled on 3/26/70 like the one you list above.
     
  5. DCL70

    DCL70 Veteran Member

    1,219
    6
    May 5, 2007
    Merrimack, NH
    Gary,

    The "JI40777" (Oct. 1969) pump with the 3/26/70 engine date is yours. You were the only one with a SS350 fuel pump that responded to my thread about a year ago. My objective was to get more examples of original 40777 pumps but no such luck.

    Here is my theory on why you pump is dated so early:
    According to my 1970 Chevrolet Parts Catalog (effective Jan. 1970) the 40777 fuel pump (GM # 6470310 in Gr. 3.900) was an exclusive new 1970 part as indicated by an asterisk (*) following the model year (70). Production of the 40777 pumps obviously began in the Fall of 1969 (or even earlier) and since these pumps were not used in the 1969 Camaro production they just hung around until the actual 1970 Camaro production began. When these pumps were finally installed on 1970 Camaro SS350 models I am sure they did not "rotate their stock" like supermarkets. Fuel pump date coding was not a concern on the assembly line. With the transition from the 1969 model to the 1970 model I'm sure it took awhile to get back to normal production.

    Dave
     
  6. bkmont

    bkmont Veteran Member

    1,043
    33
    Nov 14, 2010
    Pensacola, Florida
    This pump was on my old 1972 LT-1 Corvette.
    [​IMG]
     
  7. DCL70

    DCL70 Veteran Member

    1,219
    6
    May 5, 2007
    Merrimack, NH
    bkmont,

    Thanks, the first digit sure looks like a number "2" making the stamping "229K40956" (229th day of 1971 or August 18, 1971). I added this to my data above.

    The 40956 pump was original equipment on the 72 LT1 but apparently was never sold over the counter. The 40709 pump (GM # 6470110) was used on 1969-1971 LT1's and also used as a service pump for the 72 LT1. I would think that the 40956 pump would be quite rare. The 40709 pump (GM # 6470110) was still available from GM into the 1980's.

    Do you know the engine date code or any other date codes on the 72 LT1?

    Dave
     
    Last edited: Feb 26, 2011
  8. bkmont

    bkmont Veteran Member

    1,043
    33
    Nov 14, 2010
    Pensacola, Florida
    engine suffix -V0422CKY
     
  9. Ricks72Z28

    Ricks72Z28 Veteran Member Lifetime Gold Member

    1,021
    19
    Jan 1, 2005
    Schererville,In.46375
    Dave,

    I have the following NOS Fuel pumps that are dated:

    40726 - 214k40726

    40787 - 201s40987
     
  10. moehoward

    moehoward Veteran Member

    249
    0
    Sep 12, 2003
    Rochester NY USA
    My AC pump reads BJ 40726 Build date 04C
    70Z
     

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