Chevy and GMC Duramax Diesel Forum banner

engine noise

  1. Turbo/Engine noise

    06-07 LBZ & LLY Duramax Powertrain
    I have just replaced my CP3 pump and all seems to be fine except I have a new noise that has developed. When I put the engine under a load (like going up a good hill or hammering on it) I can hear a distinct whine. It is not normal turbo whine it sounds more like a powersteering pump low on...
  2. Injectors or Valve Train??

    01-04.5 LB7 Duramax Powertrain
    Starts up with ease no matter the temperature (has started with ease without being plugged in when the temp was around 10 degrees F). No smoke when starting (unless cold/ engine temp below 120 on temp gauge). White smoke when I accelerate quickly getting on the highway (when engine temp is...
  3. 02 dmax engine noise after shutoff

    01-04.5 LB7 Duramax Powertrain
    hello, i recently purchased my 02 gmc dmax zf6, and i have been noticing a odd noise after shutoff. i do realize most diesels make noise specially when they have higher milage (220,000kms in mine), but this sound is starting to worry me. its kind of a clunking slapping sound, lasts about 2...
  4. lb7 ticking noise

    911 Problems Forum
    hey guys just droppin in for a quick question before i got on a trip. i dont know if im just paranoid like i am with all my vehicles, or if its a problem. When its sitting there idling it sounds fine then every few seconds there will be 3-4 ticks just tick tick tick then it stops, and it will do...
  5. 1300 rpm sound

    06-07 LBZ & LLY Duramax Powertrain
    I have an 06 LBZ which at 1300 rpm makes a hissiing/sucking sound. It does not make the sound at 1350 or above or at 1250 and below. I had it in to GM and they replace a tube which I couldn't get a description on and that was supposed to fix it. Well no fix and sound still present. One of the...