Paccar MX13 idling

Discussion in 'Kenworth Forum' started by Life on Wheels, May 20, 2020.

  1. Life on Wheels

    Life on Wheels Light Load Member

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    Aug 17, 2019
    Las Vegas, Nevada
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    I try to idle my engine as little as possible, but sometimes I have to. I've heard that Paccar engines should be idled at 800-1,000 rpm to get oil to the top of the engine. Is this true in all cases? Let's say I'm idling with the a/c on for an hour, should I increase the rpm? I have a 2021 T680 with a 510 MX13 Paccar engine and Paccar transmission. Thank y'all for any feedback!
     

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  3. GrimOxford

    GrimOxford Bobtail Member

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    May 20, 2020
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    Regardless of the oil getting to the top of then engine or not being true or not, the bigger reason I know of is to prevent dpf buildup by keeping the exhaust hotter so less soot builds up.
     
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  4. Life on Wheels

    Life on Wheels Light Load Member

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    Aug 17, 2019
    Las Vegas, Nevada
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    Ahhh, that makes sense. Thank you.
     
  5. Roberts450

    Roberts450 Road Train Member

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    Feb 6, 2016
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    First thing to find out is if setting the idle up in the “pto” mode cancels the engine’s ability to preform auto regen’s. If it does I would suggest not idling it up, and letting it do its own thing.
     
  6. georgejansen

    georgejansen Bobtail Member

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    Nov 18, 2011
    Halethorpe, MD
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    2018, Pete 579, paccar engine, 291000. (previously multiple Def codes). After my last visit to the Pete shop(Def dpf codes) in Nashville (great job), I've stopped dead idling and if I have to idle for AC, bump it up to 1100 to 1300 rpm. That was April 2020, this is September 2020, dpf Def issues have been zero. Knock. Knock. Knock
     
  7. Slowhandz

    Slowhandz Bobtail Member

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    Oct 3, 2020
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    2019 389 mx13 245k miles shop just sent my truck to the dealership to bake the filter as a precaution. Since then if I low idle the truck the warning lights come on and I can not get it to regen with the switch, brakes set, cruise and jakes off, at temp... nothing works so I set the cruise and bump it up to 1050 rpm after about 15 minutes tge lights go off i turn off the cruise and it lowers the rpm to 900 and finishes a regen by itself. Hope it helps someone else, I stumbled onto it by just trying things until I found something that works.
     
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