'70 A.I.R Pump dating

Discussion in 'Original Drivetrain Topic' started by Budz, Feb 19, 2013.

  1. Budz

    Budz Veteran Member Lifetime Gold Member

    2,863
    24
    Mar 17, 2002
    Ashburn, Va USA
    I searched, but want to be sure.

    Is this the correct breakdown for this date code: 07501S

    075= 75th day (March 16)
    0= 1970
    1= shift
    S= plant

    Casting # on back cover: 7801149
     
  2. CamarosRus

    CamarosRus Veteran Member

    Buddy, I agree with your above mfg date breakdown.

    It is very very difficult to read this stamping when pump is installed on the engine in the cradling bracket.

    There is only one juudged show anywhere where this dating is even thought about.

    I would advise anybody restoring the A.I.R. "smog" system on their Camaro
    not to spend any extra money chasing a correct dated smog pump. I would
    spend your money on a quality looking replated 295 or 297 valve.

    I would also advise to make the pumps aluminum housing look original
    and NOT just glass beaded clean. I am a big proponent of having alumnum die castings vibratory tumbled in aluminum media for only a long enough time to look new , NOT polished.

    Anybody reading this have pictures showing the pump being taken apart/put together ???
     
  3. COPO

    COPO Veteran Member Lifetime Gold Member

    15,771
    148
    Sep 15, 1999
    Ontario, Canada
    [​IMG]
    Mine
    120=120th day
    0=1970
    1=1st shift
    S=Saginaw Plant


    [​IMG]
    Rear - 7801149 310 D23

    My car build date is 05E
     
    Last edited: Feb 19, 2013
  4. THNDER

    THNDER Veteran Member Lifetime Gold Member

    1,751
    3
    Mar 18, 2000
    O'fallon, Mo
  5. Budz

    Budz Veteran Member Lifetime Gold Member

    2,863
    24
    Mar 17, 2002
    Ashburn, Va USA
    Thanks...

    Mike, not to bust your chops, but whats with the lower alternator pivot bolt in your pic. I see a nut instead of the bolt head.
     
  6. INSPECTOR57

    INSPECTOR57 Veteran Member Lifetime Gold Member

    ^^ Looks like a BBC cylinder head - AFAIR they used a stud there instead of a bolt like the SBC did.

    Gary
     
  7. DCL70

    DCL70 Veteran Member

    1,209
    2
    May 5, 2007
    Merrimack, NH
    The letter "S" is not the plant. It is the broadcast number or pump model.
    Examples of other stamped codes on smog pumps:
    "11561E"
    "0381Y1"
    "14711P"

    Dave
     

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