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401 Nailhead Question?????

Discussion in 'The Hokey Ass Message Board' started by mj40's, Jul 30, 2011.

  1. mj40's
    Joined: Dec 11, 2008
    Posts: 3,281

    mj40's
    Member

    I recently had a 401 nailhead built. I was prepping it for paint and noticed the rods were put in as if number 1 was on the front left bank. Number 1 is correct to the front right bank (pass side). The first rod to the front is marked #2 in the #1 hole. At TDC the cam is indexed correctly. I'm thinking rods don't care where they are as long as the caps match the rods. The complete assembly was balanced.
     
  2. Crystal Blue
    Joined: Nov 18, 2008
    Posts: 609

    Crystal Blue
    Member

    Maybe the builders #1, is different from your #1.
    You're looking at it from the firing standpoint,
    and he may be looking at it from an assembly standpoint.;)

    Just a thought
     
  3. mj40's
    Joined: Dec 11, 2008
    Posts: 3,281

    mj40's
    Member

    If that is the case his #1 is 1-3-5-7 on the drivers bank. Buick's are the same but on the passenger side. It all ends up being correct with the correct #1 being at TDC and the cam in time with that.
     
  4. REM/Mo
    Joined: Feb 24, 2008
    Posts: 281

    REM/Mo
    Member
    from Missouri

    It really doesn't matter where the rods are installed as long as they are oriented correctly.
    All the rods are the same before they stamp the numbers on them.
     

  5. DualQuad55
    Joined: Mar 5, 2005
    Posts: 1,377

    DualQuad55
    Member
    from Epsom, NH

    Will be fine as long as rods are facing correct directions. Typically rods are slightly beveled on the side that would face the crank throws. More than likely someone who is more familiar with SBCs did the teardown and stamped the rods as they were taking them out.
    Why not call the engine builder and ask him? He might actually know what he did and why. We can only speculate here.
     
  6. gimpyshotrods
    Joined: May 20, 2009
    Posts: 17,631

    gimpyshotrods
    ALLIANCE MEMBER

    Cylinder #1 on a Nailhead is indeed farthest forward, on the passenger side. Your builder may not know this. Best to check and see.
     
  7. telriv
    Joined: Aug 24, 2005
    Posts: 67

    telriv
    Member
    from Conn.

    Don't forget, the rods have a spurt hole that points towards the cam.
     
  8. cruisinoldies
    Joined: May 7, 2005
    Posts: 15

    cruisinoldies
    Member
    from Fla.

    Maybe the builder thought he was assembling a Chevy motor.:D
     

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