Heads dont' match....

Discussion in 'Trucks and Trailers' started by cutnitclose, Apr 18, 2004.

  1. cutnitclose

    cutnitclose LawnSite Member
    Messages: 243

    What are the symptoms if a set of heads don't match on a 400 small block?
     
  2. xcopterdoc

    xcopterdoc LawnSite Senior Member
    Messages: 752

    can we have a lil background on this one?
     
  3. Metro Lawn

    Metro Lawn LawnSite Silver Member
    Messages: 2,111

    You could find yourself with the same symtoms of bad head gaskets. You may find coolant in the oil as well as smoking from the exhaust.
     
  4. cutnitclose

    cutnitclose LawnSite Member
    Messages: 243

    I found out they have matching casting numbers after all... I have a 400 small block tat is acting crazy in my work truck....
     
  5. xcopterdoc

    xcopterdoc LawnSite Senior Member
    Messages: 752

    400's have a nasty habit of cracking between the intake and exhaust valves on the middle 2 cylinders on the left head
     
  6. xcopterdoc

    xcopterdoc LawnSite Senior Member
    Messages: 752

    That would be #3 and #5 cylinders. What is yours doing that is "crazy"?
     

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