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Art & Inspiration OOPS ford flathead engine

Discussion in 'The Hokey Ass Message Board' started by Flatheadjohn47, Nov 22, 2020.

  1. Ordering parts from Speedway/person on the other end of the phone was an ex-machinist who had worked at speedway for years. Conversation turned to flatheads(I have over 55 years experience)with flat-motors and I was the salesman(friend of the buyer) for the French flatheads that came into Texas in the late 90’s. He asked me if I had heard of the Ford OOPS motor. I said I had never heard of them. When he was a machinist in the 90’s, he was rebuilding a motor and ordered new cam bearing as part of the package.He went to install them and found they “dropped” thru the normal bores that held the bearings. The “tunnel” was .020 LARGER than it should have been. He did some research and found Ford had mistakenly cast around 1,000 engines before discovering the OOPS. They manufactured 100 sets of .020 oversized cam bearings rather than scrapping the “mistake”. All 100 sets were purchased by Red’s Headers out of Cali and he purchased a set to complete his overhaul. He said Ford called it the OOPS motor; something I never heard of!
  2. Jason Mitchell
    Joined: Sep 4, 2020
    Posts: 40

    Jason Mitchell

    Interesting. Ive never heard of this either.
  3. jimmy six
    Joined: Mar 21, 2006
    Posts: 8,498

    jimmy six

    If Red Hamilton did it .... it makes sense.
  4. dirty old man
    Joined: Feb 2, 2008
    Posts: 8,860

    dirty old man

    Back "Inna Day" things like this happened. Another example of this was with Mopar flathead sixes in that you had to be sure of rod and main bearing sizes, as some came with undersize journals and corresponding bearing inserts to match. Sometimes it was only on some journals.
    Desoto291Hemi likes this.

  5. 51504bat
    Joined: May 22, 2010
    Posts: 2,573


    Don't know about Fords but my old boss rebuilt a Rambler 6 for his MIL and came to find out that it had oversize cam bearings from the factory. Chased low oil pressure until he figured out the cam bearing issue. Installed a set of oversized bearings and all was good.
  6. Jalopy Joker
    Joined: Sep 3, 2006
    Posts: 26,129

    Jalopy Joker

    learn something new every day, hopefully
  7. BamaMav
    Joined: Jun 19, 2011
    Posts: 4,726

    from Berry, AL

    Old Henry didn't believe in letting anything go to waste. That's why parts were used until they were used up, even if they were for last years model. Over the years, I've ran across things that shouldn't be a certain year model, but were, just for that very reason....
    lucas doolin likes this.
  8. continentaljohn
    Joined: Jul 24, 2002
    Posts: 4,787


    Interesting and easier to make a oversized bearing then scrap a bunch of blocks. Thats what I call “plan B “ to a oops
  9. Flathead Dave
    Joined: Mar 21, 2014
    Posts: 3,221

    Flathead Dave
    from So. Cal.

  10. 5window
    Joined: Jan 29, 2005
    Posts: 7,968


    Interesting story. I'm wondering why they only cast 100 sets of bearings for the 1000 engines?
  11. saltracer219
    Joined: Sep 23, 2006
    Posts: 806


    The auto manufacturers regularly repaired mismachined blocks and heads. When I restored the Orange Crate Olds engine I discovered that some of the original lifter bores had been bored .020 oversize by the factory.
    stillrunners and Desoto291Hemi like this.
  12. alanp561
    Joined: Oct 1, 2017
    Posts: 1,538


  13. Phil P
    Joined: Jan 1, 2018
    Posts: 341

    Phil P

    Maybe 100 service replacement sets, on top of the 1000?

  14. I reasoned that out of a thousand or so Motors, maybe 10%or about 100 would be overhauled to make a few more miles. Don’t know for sure,just a guess!
  15. seb fontana
    Joined: Sep 1, 2005
    Posts: 6,877

    seb fontana
    from ct

    BS. But what do I know.
    Desoto291Hemi likes this.
  16. Raunchy
    Joined: Apr 16, 2007
    Posts: 384


    Mine were oversized. Couldn't find any replacements. So Gary McGlasson made some. Worked out fine.
    stillrunners likes this.
  17. lucas doolin
    Joined: Feb 7, 2013
    Posts: 425

    lucas doolin

    Ford reused 1941 passenger car tail lights on 1950s panel trucks.

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