new western star 4900 dd16 engine brake issue

Discussion in 'Western Star Forum' started by dch transport, Oct 4, 2020.

  1. dch transport

    dch transport Bobtail Member

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    Sep 14, 2020
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    high seems ok low and medium positions seem to be the same strength very weak holding back power with low being slightly more anyone else had this problem ?
     
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  3. RocketyMan

    RocketyMan Medium Load Member

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    Jun 5, 2015
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    Need more info...what year? When was the valve lash done last? Do you have any fault codes? What type of turbo do you have? How are you driving it? What engine speed are you using?
     
  4. dch transport

    dch transport Bobtail Member

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    Sep 14, 2020
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    The truck is new 2021 with just under 10000 miles . There are no fault codes.Not sure about turbo , assume it is the standard type used on a dd16 600hp with 1850 torque .As for driving it is a heavy haul tractor with logging trailer grossing 120000 lb.Engine speeds vary but usually 1500-1600 .Thanks ps would like to install easy jake switch with 2 wires no light .,any experience with that?
     
  5. RocketyMan

    RocketyMan Medium Load Member

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    Jun 5, 2015
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    Try using about 1700-1800 rpms for the engine brakes and see if that slows more. Do you have a boost gauge? If you have 600HP with your DD16, I think you should have a higher "redline." Just don't overspeed the engine. I think the DD16 is the only Detroit offered with a Turbo Compound vs a "regular" Asymmetric Turbo.

    I think the first valve lash is done at 50k miles and then every 100k there after. So at 10k miles you should be fine.
     
  6. RocketyMan

    RocketyMan Medium Load Member

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    Jun 5, 2015
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    Woops! Here's the correct info on valve lash:
    100k first and then 500k there after.

    upload_2020-10-6_13-4-44.png
     
  7. dch transport

    dch transport Bobtail Member

    3
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    Sep 14, 2020
    0
    ok thanks for the info.
     
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