454 motor problem

Discussion in 'General RVing' started by hotrod nc, Jun 6, 2006.

  1. hotrod nc

    hotrod nc New Member

    I have a 1985 winnebago with 454 chevy motor. We took it on a 300 mile trip. When I started it to come home one of the spark plugs blew out.Could anyone tell me why this happened? :sleepy:
     
  2. C Nash

    C Nash Senior Member

    454 motor problem

    Not installed properly, bad threads are a couple things that come to mind. Did the new plug screw all the way in and tighten up?
     
  3. Browzin

    Browzin New Member

    454 motor problem

    hotrod nc
    Did the spark plug itself (threaded portion) blow out or did just the porcelain section blow out?
     
  4. hotrod nc

    hotrod nc New Member

    454 motor problem

    Yes the new plug did tighten. And yes the whole plug blew out.
    Thanks for all the help.
     
  5. Kirk

    Kirk Senior Member

    454 motor problem

    Could it have been loose in the head?
     
  6. kg5388

    kg5388 New Member

    454 motor problem

    i think i would replace and /or tighten the other plugs to prevent having that problem on a trip again. I have a friend that just snugs his plugs and says it's easier to remove them and he has been lucky and haven't blown out or damaged the threads with compression leaking from a loose plug.
     

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