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Mercedes 300SDL painfully slow acceleration at low end

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  • #449264
    Sang Kimskim3544
    Participant

      1987 Mercedes Turbo Diesel 300SDL OM603 /w 180K miles engine with long base W126 body – My father just purchased this car and asked me to fix several problems.

    Viewing 4 replies - 16 through 19 (of 19 total)
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    • #550572
      dollman0dollman0
      Participant

        I know this is an old thread, but I have this same car and its awesome to drive but it does have some problems.

        The lift pump goes bad and can give you a loss of power, the fuel strainer in the tank can get all clogged up with algae and other crap.

        The smoking described is from bad injectors, the cheap aftermarket injectors don’t last and go out of calibration after about six months. You can buy a kit with Monarch spray tips from Mercedessource along with a pop tester to do your own work, its kinda expensive unless you plan to do injectors often.

        Cam followers go bad and give a knocking sound when idling, this is very common.

        There are two types of Turbos and these need worked on every 100K to clean out the carbon, replace the bushings & seals. The impeller wheel, shaft and compressor wheel also wear down making less boost. The Garrett model has parts available, the KKK model is very hard to get service parts and is very expensive to replace.

        Be advised, you can never get this engine hot because the head will crack and cost a fortune to repair.

        Good luck with your Mercedes Diesel, it may be hard to work on but its one awesome car to drive.

        #545793
        dollman0dollman0
        Participant

          I know this is an old thread, but I have this same car and its awesome to drive but it does have some problems.

          The lift pump goes bad and can give you a loss of power, the fuel strainer in the tank can get all clogged up with algae and other crap.

          The smoking described is from bad injectors, the cheap aftermarket injectors don’t last and go out of calibration after about six months. You can buy a kit with Monarch spray tips from Mercedessource along with a pop tester to do your own work, its kinda expensive unless you plan to do injectors often.

          Cam followers go bad and give a knocking sound when idling, this is very common.

          There are two types of Turbos and these need worked on every 100K to clean out the carbon, replace the bushings & seals. The impeller wheel, shaft and compressor wheel also wear down making less boost. The Garrett model has parts available, the KKK model is very hard to get service parts and is very expensive to replace.

          Be advised, you can never get this engine hot because the head will crack and cost a fortune to repair.

          Good luck with your Mercedes Diesel, it may be hard to work on but its one awesome car to drive.

          #550918
          EricTheCarGuy 1EricTheCarGuy
          Keymaster

            [quote=”dollman0″ post=73380]I know this is an old thread, but I have this same car and its awesome to drive but it does have some problems.

            The lift pump goes bad and can give you a loss of power, the fuel strainer in the tank can get all clogged up with algae and other crap.

            The smoking described is from bad injectors, the cheap aftermarket injectors don’t last and go out of calibration after about six months. You can buy a kit with Monarch spray tips from Mercedessource along with a pop tester to do your own work, its kinda expensive unless you plan to do injectors often.

            Cam followers go bad and give a knocking sound when idling, this is very common.

            There are two types of Turbos and these need worked on every 100K to clean out the carbon, replace the bushings & seals. The impeller wheel, shaft and compressor wheel also wear down making less boost. The Garrett model has parts available, the KKK model is very hard to get service parts and is very expensive to replace.

            Be advised, you can never get this engine hot because the head will crack and cost a fortune to repair.

            Good luck with your Mercedes Diesel, it may be hard to work on but its one awesome car to drive.

            http://youtu.be/G3pLa-fncbE%5B/quote%5D

            Awesome man. Thanks for the additional input!

            #546122
            EricTheCarGuy 1EricTheCarGuy
            Keymaster

              [quote=”dollman0″ post=73380]I know this is an old thread, but I have this same car and its awesome to drive but it does have some problems.

              The lift pump goes bad and can give you a loss of power, the fuel strainer in the tank can get all clogged up with algae and other crap.

              The smoking described is from bad injectors, the cheap aftermarket injectors don’t last and go out of calibration after about six months. You can buy a kit with Monarch spray tips from Mercedessource along with a pop tester to do your own work, its kinda expensive unless you plan to do injectors often.

              Cam followers go bad and give a knocking sound when idling, this is very common.

              There are two types of Turbos and these need worked on every 100K to clean out the carbon, replace the bushings & seals. The impeller wheel, shaft and compressor wheel also wear down making less boost. The Garrett model has parts available, the KKK model is very hard to get service parts and is very expensive to replace.

              Be advised, you can never get this engine hot because the head will crack and cost a fortune to repair.

              Good luck with your Mercedes Diesel, it may be hard to work on but its one awesome car to drive.

              http://youtu.be/G3pLa-fncbE%5B/quote%5D

              Awesome man. Thanks for the additional input!

            Viewing 4 replies - 16 through 19 (of 19 total)
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