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popping through exhaust

Discussion in '6.9L IH & 7.3L IDI Diesels' started by 8lugchug, Jun 17, 2019.

  1. 8lugchug

    8lugchug Registered User

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    7.3 idi non turbo zf5 trans .Need some help ... having a loud popping sound through the exhaust. Anybody with same experience? Valves ?
    Where to begin
     
  2. DaveBen

    DaveBen Supporting Member Supporting Member

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    When do you hear the popping? At start up or after it is hot?
     
  3. IDIBRONCO

    IDIBRONCO IDIBRONCO

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    By this description, I'd say that it's wore exhaust valve guides.
     
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  4. 8lugchug

    8lugchug Registered User

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    Seems to be after it warms up it gets louder
    Kinda just sounds like it’s running rough when you first start it
    But popping def gets louder after driving a little
     
  5. 8lugchug

    8lugchug Registered User

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    Update .. I pulled the valve covers and checked the valves/rockers etc
    Found one valve that had some play in it
    Seems to me like the spring is either broke or wore out def not seating completely
    Also found a lot of wear on the rockers(valve side )
    Is there anyway to flush these engines
    I had quiet a bit of build up in it
     
  6. IDIBRONCO

    IDIBRONCO IDIBRONCO

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    You can flush these engines out, but I can't remember what others have used right now. What kind of build up? If it's sludge, then that's "normal". If it looks like charcoal, then that's a sign of bad valve guides.
     

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