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Technical new rebuilt flathead smokes

Discussion in 'Traditional Hot Rods' started by Sean66, Apr 6, 2021.

  1. Sean66
    Joined: Apr 6, 2021
    Posts: 24

    Sean66

    Should I be worried about to much smoke? I was told it could be the rings seating.
     
  2. tubman
    Joined: May 16, 2007
    Posts: 5,648

    tubman
    ALLIANCE MEMBER

    How much time on it?
     
  3. Sean66
    Joined: Apr 6, 2021
    Posts: 24

    Sean66

    Not much, I let it run for the first time 20-30mins, is that to long?
     
  4. blowby
    Joined: Dec 27, 2012
    Posts: 7,550

    blowby
    Member
    from Nicasio Ca

    What color?
     

  5. Usually they smoke for the first few minutes as all the assembly lube and oils burn off and then they clean up the exhaust pretty good. I think you will have to run it a little longer and see if the exhaust cleans up .
     
    anthony myrick likes this.
  6. Sean66
    Joined: Apr 6, 2021
    Posts: 24

    Sean66

    white
     
  7. Sean66
    Joined: Apr 6, 2021
    Posts: 24

    Sean66

    Okay thanks
     
  8. Kiwi 4d
    Joined: Sep 16, 2006
    Posts: 3,041

    Kiwi 4d
    ALLIANCE MEMBER

    I would be concerned by white smoke out the tail pipe after it has warmed up. White smoke = coolant consumption . Check your coolant level. If it is coolant loss it needs further investigation. A little condensation spitting out the tail pipe is normal till it warms up.
     
  9. Heads need to be retorqued a few times after warm up and cool downs until the the nuts or bolts keep their tightness. Start there.
     
  10. nuppi
    Joined: Aug 7, 2016
    Posts: 10

    nuppi

    If coolant is going thru cylinder, spark plug is usually very "clean" versus other plugs.
     
  11. Baumi
    Joined: Jan 28, 2003
    Posts: 2,747

    Baumi
    Member

    What kind of transmission are you using? In case it's an automatic, a ripped Modulator diaphragm may allow atf to be sucked into the intake and that will also produce white smoke, ask me how I know...
     
  12. Sean66
    Joined: Apr 6, 2021
    Posts: 24

    Sean66

    Thanks for all the response, I will check the coolant level, and retorque.
    I’m using 3sp 37-38 top load transmission.
     
    Baumi likes this.

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