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Bradan 550 engine rebuild

Discussion in 'Bradan' started by BRADAN, Mar 12, 2014.

  1. BRADAN

    BRADAN Two Time F1 World Champ
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    #51 BRADAN, Mar 14, 2014
    Last edited by a moderator: Sep 7, 2017
  2. BRADAN

    BRADAN Two Time F1 World Champ
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    #52 BRADAN, Mar 14, 2014
    Last edited by a moderator: Sep 7, 2017
    This is what we believed happened. The small bearing on the front of the oil pump driveshaft fell apart. It caused the oil pump shaft to wobble and strip the teeth off which connect it to the pump. This starved the motor of oil causing the camshaft previously shown to seize in place. Once the camshaft seized it kicked the belt off locking up the driver side bank.

    Missing bearing with outer race still inside the hole.
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  3. BRADAN

    BRADAN Two Time F1 World Champ
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    #53 BRADAN, Mar 14, 2014
    Last edited by a moderator: Sep 7, 2017
  4. BRADAN

    BRADAN Two Time F1 World Champ
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    #54 BRADAN, Mar 14, 2014
    Last edited by a moderator: Sep 7, 2017
  5. BRADAN

    BRADAN Two Time F1 World Champ
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    #55 BRADAN, Mar 14, 2014
    Last edited by a moderator: Sep 7, 2017
  6. BRADAN

    BRADAN Two Time F1 World Champ
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    #56 BRADAN, Mar 14, 2014
    Last edited by a moderator: Sep 7, 2017
  7. BRADAN

    BRADAN Two Time F1 World Champ
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    #57 BRADAN, Mar 14, 2014
    Last edited by a moderator: Sep 7, 2017
  8. BRADAN

    BRADAN Two Time F1 World Champ
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    #58 BRADAN, Mar 14, 2014
    Last edited by a moderator: Sep 7, 2017
  9. moorfan

    moorfan Formula Junior

    May 11, 2009
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    Pete
    Thank you for this thread. Great information. So I'm trying to decide what to take away from this for me, and I believe that we probably should be checking that oil pump shaft bearing behind the sprocket.

    Last major I did I did not remove the sprocket to remove the front timing cover, but this time I will :)
     
  10. BRADAN

    BRADAN Two Time F1 World Champ
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    Thank you.

    Honestly it's a freak accident. I don't think you would even be able to tell if the bearing is about to fail or not before it does. It's a shame a $15 dollar bearing caused all of this.
     
  11. BRADAN

    BRADAN Two Time F1 World Champ
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    #61 BRADAN, Mar 14, 2014
    Last edited by a moderator: Sep 7, 2017
  12. BRADAN

    BRADAN Two Time F1 World Champ
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    #62 BRADAN, Mar 14, 2014
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  13. BRADAN

    BRADAN Two Time F1 World Champ
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    #63 BRADAN, Mar 14, 2014
    Last edited by a moderator: Sep 7, 2017
  14. BRADAN

    BRADAN Two Time F1 World Champ
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    #64 BRADAN, Mar 14, 2014
    Last edited by a moderator: Sep 7, 2017
  15. moorfan

    moorfan Formula Junior

    May 11, 2009
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    I know, right? Frustrating.
    I guess we could make the case for prophylactic replacement of this bearing but what about the other one at the back of the shaft where it connects to the oil pump??? Can't turn every major into a complete teardown.
     
  16. DWG

    DWG Karting

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    #66 DWG, Mar 14, 2014
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  17. BRADAN

    BRADAN Two Time F1 World Champ
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    Yeah there is no way to prevent this. At the end of the day it's a machine made of a hundreds of individual parts. Things fail.

    Later in this thread you will find a few design changes interesting in the new parts we bought. Looks like either Ferrari picked up on a few possible issues.
     
  18. bretm

    bretm F1 Rookie

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    Wow. I absolutely did not see that coming based on the first post. As always, thanks for sharing.
     
  19. Barbapapa

    Barbapapa Rookie

    Jun 23, 2006
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    Do you mean the teeth were worn down and no longer mesh in order to drive the oil pump?

    I can't believe the bearing would just fall apart on it's own. Was there debris that lodged in the pump itself causing high drive effort?
     
  20. fatbillybob

    fatbillybob F1 World Champ
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    It will be interesting to see how you handle the bearing 170787 issue. I hope you can give us some guidance.
     
  21. George Vosburgh

    George Vosburgh F1 Rookie

    May 26, 2011
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    WOW! That is shockingly low mileage. When we tore open my '77 308 it didn't look too much different than this engine, but mine had 67,000 on it.
     
  22. bundas

    bundas F1 Veteran
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    with last major. bad job.
     
  23. Nurburgringer

    Nurburgringer F1 World Champ

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    Great pics of a sad machine...
    Thanks for sharing.

    How long do you think it ran without oil?

    Shouldn't an oil pressure light have come on right away?

    Must have sounded awful :(
     
  24. bundas

    bundas F1 Veteran
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    less than one min. at 6,000
     
  25. Barbapapa

    Barbapapa Rookie

    Jun 23, 2006
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    Michael S.
    Another possible problem is a sticking relief valve. There's not a lot of effort required to drive an oil pump with normal pressure but if the relief valve sticks it could get sky high.
    Is the coupler split?
     

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