'70 dashpot p/n?

Discussion in 'The Venerable Q-Jet' started by Lars GS, Jan 12, 2020.

  1. Lars GS

    Lars GS Well-Known Member

    image.jpeg I currently have a 1970 dashpot & bracket off a 455 Riviera on the for sale forum. On the back side of dashpot it has US PAT 2657038, 2862702, 2894740 FF MFG CO. Can anyone tell me for sure if it would be the same as a 1970 455 GS? I know the bracket is different. From what I've researched it may fit quite a few years and engines. It would be nice to let potential buyer know! Thanks!
     
  2. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD"

    Why would the bracket be different? The 455 intake on a 70 Riv is the same as the one on a 70 GS. Not sure they used that past 1970.
     
  3. thepartsman

    thepartsman Back Ordered Again ?

    GM #1376158
    68-69-70 and early 71
    350,400,430 and 455
     
  4. Lars GS

    Lars GS Well-Known Member

    Oh yes I didn't think of that da. I guess I was looking at pics in service manual and they looked different. Thanks for clearing up my brainfart Larry! Where would the p/n be on the switch? I found this on it. And on the nut part of switch it has 11 11 60
    PAT PEND
    DOLE VALVE CO
    MORTON GROVE ILL
    No p/n that I can find. I used a brass brush on it alittle. Does this mean it's aftermarket part?
    I've had this engine since 1985 in garage and just removed it.
     

    Attached Files:

  5. mrolds69

    mrolds69 "The Cure"

    It looks like 11/11/69 to me. There is no part # on them.
     
    HotRodRivi likes this.
  6. Lars GS

    Lars GS Well-Known Member

    I thought it might also be 69 . Thank you Frank!
     
  7. Lars GS

    Lars GS Well-Known Member

    Where would the p/n be on the '70 dashpot? I have too many things to ask. Getting mixed up sorry guys!
     
  8. mrolds69

    mrolds69 "The Cure"

    No part # on the dashpot, but it looks correct. Here's my experience Lars...used intact dashpots almost always still function. Used ported vacuum switches almost never function. I once had a friend who cut one in half vertically. Inside there are one or more small balls. The inside was all gummed up like from old oil fumes, and the passages are tiny.
     
  9. Lars GS

    Lars GS Well-Known Member

    I only found patent numbers on dashpot and yes it does work. Thank you very much for the info sir. I used to be a gm tech but not in the '70s. Thanks again for your time and knowledge! Jeff Kolars
     
  10. mrolds69

    mrolds69 "The Cure"

    You're welcome Lars. The vacuum switch is still use-able for a car. It just may not function perfectly.
     
  11. Lars GS

    Lars GS Well-Known Member

    Gotcha! Thanks!
     
  12. thepartsman

    thepartsman Back Ordered Again ?

    So post #3 didn't answer your question ?
     
  13. BrunoD

    BrunoD Looking for Fast Eddie

    The 70 looks the same to me.I have 3 of them,don't remember having that many 69's to take them out of.Just remember I got one out of a 70 Riviera a few weeks ago,its the same as that.Bruno.
     
  14. BuickV8Mike

    BuickV8Mike SD Buick Fan

    I'm almost certain theirs a bunch of part numbers for these. Just like carbs and distributors.
     
  15. Lars GS

    Lars GS Well-Known Member

    It does have 3 patent # on the back side FF MFG CO US 2657038 2862702 2894740
     
  16. Lars GS

    Lars GS Well-Known Member

    I just don't see a 1376158 on it anywhere.
     
  17. Lars GS

    Lars GS Well-Known Member

    But thanks for the p/n David!
     
  18. BuickV8Mike

    BuickV8Mike SD Buick Fan

    Heres what was used in 1969 at Plant 36. 15789762469286005230120816671891.jpg
     
  19. Lars GS

    Lars GS Well-Known Member

    Nice info! Thanks BuickV8Mike!
     
  20. BuickV8Mike

    BuickV8Mike SD Buick Fan

    Somewhere they talk about the spring colors on these. I painted mine red. :)
     

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