Pete 386 with the Paccar MX engine

well i guess ill throw my 2 cents in as someone with mechanical experience with the engines. There are a slew of complaints about the european MX engines having problems having high oil consumption this was an issue with the rings being exposed to too much combustion pressure and carbon build up on the pistons scoring the walls. This has been solved in the US versions of the engine by putting a ring at the very top of the sleeve that cleans the carbon off the piston and seals some of the pressure off protecting the piston rings.

A lot of people mentioned DEF lights coming on solid or flashing or flashing in conjunction with the check engine light. These 3 signs denote the three levels of DPF soot load, on solid is stage 1, flashing is stage 2 and flashing with CEL on is stage 3. You'll get these warnings mainly if you do a lot of idling or local drives once you get stage 1 just at the next stop put the truck in neutral set your parking brake have your feet completely off the brake, clutch and gas and click your DPF switch to on and hold it until the engine idles up which usually takes 5-10 secs and what you've done is started a parked regen that will bring your soot level down to normal. If you get to stage 3 stop immediately and clean it because if you get to stage 4 its a derate and itll need to come into a dealer to force a regen. Also be sure to be parked away from anything flammable.

As far as the complaints with the jake brake go it is gonna be weaker than an ISX15 or a C15 simply because jake braking is a function of displacement and 13 liters cant compete with 15 to get better performance out of it you'll have to rev it into the 2k range which is gonna take more downshifting on the drivers end

 

So, Paccar pays you how much???

 

Let me tell you something Jo from oh, I suspect you are a Paccar employee! Send me a pm of your personal details and I'll give you my misery with Paccar engines, how ye nearly broke me! How crap those engines actually are! And how you can't accuse me of slander as I have documented evidence of just how good your engine isn't!! And mine were euro3, the reliable ones!

 

I don't work for paccar. I do however work on diesel engines for a living and as my profile says i drove for 5 years. Most of the issues with the american version is oil blowing through the turbos in trucks with high idle time its a known issue and you'll have to same problem with a cummins because they both use 500 series variable turbos from Holset(we replaced turbos in five ISXs just last week). Same goes with the DPF/DEF system because from the back pressure valve to the tailpipe paccar buys their emission equipment directly from cummins. Other than that most of what paccar engines have been coming in for have been ECU updates and recall upfits. They also had a problem with their first run of fuel lines going bad which is pretty common as well. Oil spinner filter caps was another issue over here because people would use the fleetguard versions and they'd spin faster than the paccar ones and unscrew the cap and itd start leaking and itd burn out the bushings in the top of the cap.

I never accused you of slander anyway. I'm just saying that the american version and the european versions of the MX are very different and issues with your version might not carry to ours. I've seen the european MX and it hardly resembles what we have since we have much stricter emissions standards over here which is why we are stuck running so much EGR and using DPFs and SCRs.

As far as running an MX engine as an owner operator you're kinda screwed whether you go Cummins or Paccar because you can pick Paccar and have a really picky engine that you can only run Paccar filters in and you lack power and engine braking ability. If something ends up being a problem with the gear train or you wipe a cam lobe you'll have to pay to pull your engine and that'll cause more down time. And if you buy a Cummins you'll have even more turbo problems than an MX and have EGR coolers go bad constantly. And if you pick any new emissions truck you're gonna have plenty of problems with your emissions systems while they try to iron out the kinks.

Its hard to draw a real conclusion as far as which one is more reliable than the other since i work at a Kenworth specialty shop and we do work on a ton more Cummins than Paccars but at the same point 78% of KW trucks sold have Cummins and 22% have paccar engines. Then you just get into the random chance that you're in an area with a lot of Cummins trucks or an area with a lot of Paccar trucks.

 

Paccar did seem to drop the ball on the engine deal. What a choice a gutless non engine braked half clone. Or the original that seems to have lost it's way.

 

Unfortunately its a byproduct of the EPA. The reason the Paccar engine is configured this way is because starting in 2013 we're gonna be seeing a cap and trade system be optional then in 2014 it'll be mandatory. Paccar is one of the manufacturers opting in. The system is set up so for every paccar equipped t660,t700 or t680 sold they're gonna get a decent amount of points towards their cap then they can use those points to be able to manufacture a less fuel efficient truck, for instance a W900 with an ISX15 600hp, without having to pay for points. All truck manufacturers are going to be required to pay fees for any engine sold with over 485hp, which is not surprisingly the most hp you can get from an MX. So come 2014 if you buy a W900 with an ISX15 600 you will be paying Paccar for their EPA points they'll be using up making the truck and then have to pay for the extra hp resulting in a lot higher price. We'll also be seeing our truck computers all going to OBD protocol so the EPA can hook up to truck computers and make sure they're in EPA compliance. There are going to be hefty fines incurred for driving with an emissions fault logged on your ECU. Engine HP uprates are also gonna be gone as they'll be removed from standard programs and will be replaced with manufacturer provided files to flash your ECU to. This service is gonna cost on average $2000 for any uprate over 480hp and even downrating wont be free and having an incorrect EPA sticker on your engine after the hp change will also carry a hefty fine. And i almost forgot to mention there are going to be fees incurred based on your maximum speed programmed in your ECU and an increase in maximum speed is going to go through the same process as hp uprates.

If i had a choice of what to run right now i'd buy a W900 with a CAT C15 pre A-CERT they're still around but unfortunately I'm not the only one who shares that sentiment. Our local KW dealer got five trucks with that very configuration all around the 750k mark last Monday and they were sold before they even got through their service department and all sold for well above what you'd expect an older mid mileage truck to go for. As people come onto the market for a new truck and hear all the bad things about the new emissions equipment i don't see this trend changing soon.

And to add yet another bad requirement to it if you haul into California a lot you cant even run an older pre-emissions truck so you turn around only to get fked again.

 

You wanted this America... Keep voting 2 party, keep voting Republican or Democrat because your Daddy did. Keep complaining about politicians and not doing anything about it.

The Supreme Court isnt on your side. EPA wants ALL trucks to disappear tomorrow. The rest of the world is laughing at America because we had the greatest country in the world and we squandered it, we gave it to politicians.

Too many of us have been pushed too far, some of us are becoming dangerous. Politicians dont fear guns or bombs, they fear information. The post that I quoted above is information that 20 years ago, you would not have realized until it was too late.

Knowledge is power.

 

I apologise! I mistook you for one of these damage limitation numties DAF/paccar have been putting on this forum, these ' imProvements you speak of haven't made it here yet, DAFS biggest costumer base, why I wonder? If you knew how I was treated by DAF/paccar you'd understand !

 

That's exactly how we "" see it! Smart guy!

 

I heard that paccar Corp did not pay any US income taxes! Nice deal uh?