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Mackpro

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Everything posted by Mackpro

  1. Mackpro
    This truck is still at the 330/350 level. It's the exact same engine as the 400 and could be bumped up to 400 with a factory download. The torque output is the same either way at 1460. Anything bigger requires turbo and injectors and cam key way change. But with that trans you might need to stay with the maxi cruise setup. You could also get the 355/380 download that requires no parts and get 1560 torque output.
  2. Mackpro
    The foot valve is not centered in the mounting bracket . When you push down on the brake pedal , the pedal hits the plunger which presses on the foot valve. When the foot valve is not centered the plunger pushes down more on one side than the other of the foot valve and a small amount of air shoots past the seals into the cab
  3. Mackpro
    The first time they flew in a guy was when we were having all the wiring harness failures. You might put 2 or 3 on before you got a good one . That customer had about 10-15 trucks. Next time a tech was flown out it was over a unusual fault code for the DPF and Mack wanted to see for themselves what was going on. That customer had around 35 Mack dump trucks. This last time it was a individual single owner operator and a SCR fault and replaced the SCR hot box. The data logger really helped out on the last issue.
  4. Mackpro
    This is so true! Corporate calls the shots after a certain point , I feel for the customer. We have had corporate fly in guys with data loggers more than once.
  5. Mackpro
    Give me the model and last 6 of the vin and I can pull up in the Mack mainframe on Monday and see if it's still at that hp level
  6. Mackpro
    maybe. If you use the engine ECM that comes with your new (used) engine it won't match the VIn of the other ECMs and you will have issues in the future if any programming needs to be done. If you use the original engine ECM with new (used) engine then the injector calibration codes won't match and that can cause other issues
  7. Mackpro
    One of our customers has a 2008 CHU MP8 485hp that they use for moving heavy equipment. They got a new loader or some new super heavy piece of equipment that was to much for the 485 HP so they bought a 605 Titian. One day the Titian was busy so they hooked the 485 HP up to this 100,000 pound piece of equipment. It didn't make it far and broke the crank. Truck had under 150,000 miles on it. We put a Mack reman engine in it. That was the only crank failure we have seen in the MP8. One of our other shops have seen a couple MP7 broken cranks but unknown of details.
  8. Mackpro
    Mack corporate always told us not to worry about blow-by . Oil consumption is what they looked at. My friends 99 CL had bad blow-by from the 500,000 mile mark up to a little over a million mile mark when we over hauled it. Used a gallon of oil per 8,000-10,000 miles. Steady stream of blow-by don't bother me. It's the puffing blow by you gotta watch out for.
  9. Mackpro
    Lol , yep! I got the bottom end done and the head on . I'll send tomorrow on the cam, rockers , upper rear timing cover and injectors. Hopefully I'll be test driving Friday. Had 3 pistons with broken rings , did all 6 cylinders . We have seen several early MP7's do this .
  10. Mackpro
    Back in 2009/2010, I had finally lost all patience in working on the MP engine family and went job hunting. Got at interview at a large local Toyota dealership. They asked me why I wanted to work at Toyota. I said , " Toyota makes a great product that is very reliable and any issues are quickly corrected and it would be great to work for a corporation that truly strives to put the best product out there that they can". Then the interview guy asked " Why do you want to quit where your at?". I said " Just write down the opposite of everything I said about Toyota ." He gave me a funny look.
  11. Mackpro
    There is a bulletin on this . Seems to only happen on the GU's even though it's the exact same set upon the cxu/chu. It's kinda a burping noise at the foot valve that vibrates the brake pedal in most cases.
  12. Mackpro
    Only thing you could use off the AC engine would be heads, block, crank , rods and pistons . I heard using a AC cam in a AI setup works really good though. What's wrong with your old engine?
  13. Mackpro
    The engine ecm in a way , gets to know various sensors and even the injectors and learns their usual readings and characteristics. When you replace one , it's a good idea to do a learned data reset so the ECM can relearn the new sensor . Not to confused with calibration codes which also need to entered when injectors are replaced on a MP engine. On engines sometime around 2014/2015, learned data reset was renamed and moved in PTT. It's under calibrations now and called something like sensor calibrate reset. Kinda confusing.
  14. Mackpro
    Different engines. That year CV has the AI engine. CXN and CHN's of that year use the AC engine. Could be made to work but definitely not a drop in situation.
  15. Mackpro
    The only MP8 paper service manual I have seen was for 2007/2008 emissions . For newer trucks you have to buy the big binder($350) with all the printed material from Impact. Basically they print it from Impact and put it in a binder and charge you $350. As far as differences in 2010 to 14 emissions engines are injector part numbers , doing away with exhaust shims, egr valve and diff sensor upgrades and SCR box is different part numbers. 2 piece valve cover. And of course software changes. Their might be more but that's all I can think of for now
  16. Mackpro
    Yes , 2 days is about right, and that's if nothing breaks ( turbo / EGR bolts)
  17. Mackpro
    Yes, one goes to compressor and other to drier. The other line by itself, goes to the first/wet air tank
  18. Mackpro
    Air drier. The the exhaust port to the left in picture always stays open/ not plugged
  19. Mackpro
    The MP engine really makes me appreciate the ETECH family of engines on how simple they were. Right now I'm overhauling a MP7 with 176,000 miles on it . My buddy in the next bay is overhauling a ASET . We started at the same time and he's going back together with his and I just got the head off on mine. They are a very time consuming to strip down or do major repairs to.
  20. Mackpro
    We have been lucky down here with our common rail engines , other than software and PM sensors we have had zero issues. Hopefully it stays that way!
  21. Mackpro
    New bulletin released last week on the 20EE code on the common rail engines. Very detailed info. Hopefully they got yours figured out.
  22. Mackpro
    P20EE is a NOX code which could be caused many different things. We have not seen this code here with our 17/18 common rail engines but have seen it on older trucks. Anything from EGR, turbo, injector to the DPF or SCR "hot box" could be the cause. There is a bulletin on it but mostly goes over making sure you do the tests correctly and not skipping steps and what info gets reported to Tech Support for review.
  23. Mackpro
    My buddy's newest GU is coming in with full air controls for the bed unlike his other GU's . His driver requested it due to thatsvwhat he's used to. We will see how it sounds when it gets here in a few weeks.
  24. Mackpro
    I will pass this info on my my buddy who has 3 GU's with MP8/ Allison. I'm pretty sure he has the cable up/down controls.
  25. Mackpro
    There are 2 fuse boxes , one on top of the dash and the other by clutch pedal inside on the fire wall.

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