Pete 386 with the Paccar MX engine

Discussion in 'Peterbilt Forum' started by Flying Finn, Feb 22, 2011.

  1. DAFMAN

    DAFMAN Bobtail Member

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    Sep 16, 2011
    bristol
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    latest spec european MX is awesome up to previous spec.
    we have 360 to 510bhp, when i was at Eindhoven for pre launch training for trial vehicles i drove 560bhp twin turbo MX, unfortuneatly never went into production, trial only.
    maybe one day we will see this one, high pressure and low pressure turbo in production to match Scania 730bhp and Volvo 750bhp
     
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  3. Scania man

    Scania man Road Train Member

    2,199
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    Jul 1, 2011
    Saskatchewan
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    We have those engines in dafs over here, those engines won't make half a million miles nevermind one million, I'm speaking from experience, I owned two of them, bought two new ones in 2003, one made 230,000 kms and the second 540,000 kms, that's kilometres not miles ! I know plenty of people here with the same experience, if they don't blow up before 600,000 kms they will be worn out, even newer engines are having the same problems, stay far away from them, absolute crap, stick with your cummins, you'll regret it if you don't
     
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  4. Scania man

    Scania man Road Train Member

    2,199
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    Jul 1, 2011
    Saskatchewan
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    We see exactly what you just described here all the time with these engines, very poor quality stuff, That's usual stuff, dropping valves, burning oil, warping and cracking heads, engines wearing out prematurely when pulling heavy loads, the list goes on, and that's terrible fuel economy, really really bad engines, the backup service here is as terrible as the engines, I will never have anything to do with daf/pacaar again, and I'll bet those two engines from that small company ain't old either, am I right?
    Also two engines having these problems in a small fleet, this should be a good indicator,
     
    Last edited: Oct 7, 2011
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  5. Scania man

    Scania man Road Train Member

    2,199
    483
    Jul 1, 2011
    Saskatchewan
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    No ye won't ever be a match! As an ex customer of daf/pacaar besides yer obvious reliability issues daf customer care needs a radical overhaul. When my daf's broke down ( which was often )I had to pay for the towing myself Eventhough the trucks were under warranty, when the engine 'wore out' in 230,000 kms ( less than 140,000 miles) and the second in 540,000 kms , Eventhough both were on contract maintenance with daf/ pacaar, they didn't want to know! ZF gearboxes were also very problematic, This by the way isn't an isolated incident! Many of my fellow Irish operators had and still are having major difficulties with daf, what crap! I don't know one daf to make it past 600,000 kms , not one! You will not find a daf over 6 years old here either , most have been scrapped or exported as scrap!
     
  6. ProduceHauler

    ProduceHauler Light Load Member

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    Apr 28, 2011
    California
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    Finally something worth reading from you. I was afraid it is never going to happen. Thats what I have heard from polish owner back in 2007 or so when they just introduced these 510hp motors - there was oil consumption problem leading to premature overhauls. Everyone was oh so pissed off. These funny motors were dragged to US by big-fleet demand for non-lasting trucks, all they need is 3 years out of them, all under warranty and then they want to screw the second buyer who is actually their competitor. Sad to see but its end of trucking as we know it
     
  7. pfudd

    pfudd Bobtail Member

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    Sep 12, 2010
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    Have you ever heard of a company called PRO Transport that ran out of Little Rock, AR in the late 90's? If no, I would suggest you read the following: http://www.thefreelibrary.com/Volvo+tractors+blamed+for+pro+transport's+woes.-a0119740251

    I am sure that in a couple of years any issues involving the MX engine will be resolved. Especially since KW and Pete rely on small fleets and owner-operators so heavily b/c of their reputation for quality, they will have to address the problems quickly.

    The people who I would be talking to are "experienced" Trans-am drivers because Trans-am made a huge investment into the MX engine. Being they train new drivers and run teams coast to coast, they are going to be the major source of information about running the MX more than 200,000 miles/year. They would probably also be a good source of information about the Thermo-king APU's.
     
  8. rightlane369

    rightlane369 Bobtail Member

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    Jan 27, 2012
    Houston, TX
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    OK, here is some facts about the Paccar MX that comes with the 2011 Pete 386, also know as the Aero. I have been driving one since May 2011, just turned 90,000 on the engine. Here is what I have went through thus far.
    The water pump starting leaking and the hoses vibrated lose after 72,000 mi. No prob. to me as all trucks go through the break in period and it was under warranty. As far as the ERG thing, Peterbilt had a recall for the early Jan. models of the 386 because the ERG Valve was losing it's seal and leaking oil on the exhast and losing power. I did not have that prob. because I purchased mine in May. The Check Engine Light Thing, yes, was a problem after I bought the truck, Rush Peterbilt could not fix it because they continued to re-install the improper software for the ECM, I took it to a Peterbilt dealer, the problem has not returned.
    I just hauled 42,683 lbs from Fremont MI. to McDonough GA. (Target LD) Via I-24 through TN. I got 6.0 on my trip MPG. I have hauled 43,000+ from Kansas City to Houston and got 6.4 but that trip is mostly flat after MO.
    The filter thing, the only filter I have to go buy because no one else carries, is the in glass, Primary Fuel filter, I paid $69 and some change for them. as far as the other filters, during PM's, TA's, Wingfoot's have always had the other filters, I just have to bring them the in Glass Primary, because they don't carry it.
    Also, the exhaust stack started to rattle lose around 75,000, no biggie, just tightened it down and all is well
    I am having one more possible prob. but it may be a filter thing, that is when I first got the truck the DEF (from full tank to empty) would last around 5,100 mi, now it only lasts for about 4,500 and seems to be declining, I will be checking it out next weekend when I get home.
    Other than that, the Pete 386 with the Paccar MX 2250 Cummings has been great, I am glad I got it, oh, it has the Eaton fuller 13sp. Hope this has helped with any curiosity's.
     
  9. campfire

    campfire Bobtail Member

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    Feb 2, 2012
    Emington, Illinois
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    We have a 2011 T800 with a 485 MX with about 87000 miles. Decent on power once you get it rolling and the cruise set (slow taking off because of the computer not giving it everything until you get rolling good). We get good fuel mileage of 5.8 to near 7 hauling grain and rock locally in east central Illinois. Our biggest complaint is wiring and sensor malfunctions that give false alarms and then don't tell you when something really is happening. We just had ours towed to the shop two days ago because red light came on and derated the engine all at once. Come to find out the EGR cooler and some tubes were plugged with soot and had to be cleaned, and a nox sensor was bad. No warning that this was about to happen, just boom and your done. This truck runs good when it is running but the recalls and problems with the emissions part of the engine (all Cummins from the turbo on back) have been frustrating. The KW shop always has to get the parts from somewhere else or rob them from a new truck sittind in their lot and our truck sets. Even though it has been under warranty we still have to go 75 mi to get it to the shop and all the lost earnings at $700 to $900 per day add up. We keep thinking that it will all clear up but some emissions system problem always seems to come about. How our KW dealer handles this one will determine if we keep it or not.
     
    Last edited: Feb 3, 2012
  10. rightlane369

    rightlane369 Bobtail Member

    7
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    Jan 27, 2012
    Houston, TX
    0
    Yea campfire, I do have that slow takeoff prob. but on my engine, no real probs. or with the DPF, I did have probs. with warnings and errors, and my engine did run crappy, and I found out that Rush Peterbilt was re-flashing my ECM with outdated software, took it to the dealer, that was what they said, they re-flashed the ECM with the right software, haven't had a prob. since.

    I was thinking about getting on of those manifold separators that TA sells for about $140, I ran into one driver who got it and he said it didn't really improve his MPG that much, but increased the power, which would improve takeoff speed. Have you, or anyone else, have any experience with the manifold separator's?
     
  11. ts675

    ts675 Bobtail Member

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    May 30, 2011
    Valparaiso,IN
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    Have the 386 as well with the mx and I will just come right out and say it, I hate it. Between the deratings and the dpf system and the egr cooler going bad and everything else, I say stay away. My truck has 194,000 on it and it has been in the shop 6 times 3 of those for the same issue. I used to be a big Pete supporter now I am just trying to talk myself into staying in this one until its paid off. Buyer Beware, unless you are looking for something to increase your home/downtime (i.e/ breakdowns) stay away.
     
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