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Mackpro

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Everything posted by Mackpro

  1. Mackpro
    Here’s the easiest way to tell a VMAC 1 from a 2 on a CH style truck . A VMAC 1 has the engine harness plug iinto the firewall right above the windshield washer fluid jug on the passenger side of the firewall. On a VMAC 2 truck , there is a block off plate above the windshield washer fluid jug . Also , the Econ-Vance is a lot longer on a VMAC 2 and the injection pump almost touches the air compressor, and of course the VMAC 3 is an ETECH style engine with the heat shielding over the individual injector pumps
  2. Mackpro
    We alway tried to achieve 33 psi of boost under a pull with the 460 AC engines. I have seen a few go higher but we were happy at 33 psi. Worn out boost pressure relief valve or cracked after cooler or malfunctioning turbo actuator were some of the reasons for low boost
  3. Mackpro
    There is a factory valve spring compressor that works awesome , it’s downfall is that the injector has to be removed
  4. Mackpro
    We would pull the intake manifold off and drop the intake valve down. Then blow air into the injector hole and blow the little pieces out the intake . Saved us form pulling the head off .
  5. Mackpro
    Only saw a few of the stainless cup tips break off. Saw lots of the copper cup tip break off when using the newer style puller. Lucky we held onto the old style tool that taps threads into the cup tip and then uses a pulller that threads into the cup .
  6. Mackpro
    Truck created on 2-10-2000, transferred to sales on 2-21-00. That’s all I could get my dealership guy to find.
  7. Mackpro
    We saw burned valves , cracked liners and cracked head. To much fuel and clean air and they burn pretty hot.
  8. Mackpro
    The max HP rating for a export MP8 with no EGR is 440. I’ve seen 3 major engine failures on low mileage deleted MP8s . One I know was a 505 , the other 2 I’m unsure on HP. I would feel better if the EGR was not deleted but the DPF/SCR was
  9. Mackpro
    Volvo has had the injector cup problem in the D12 and their other engines before the D11,13,16 and MP7,8 and 10 came out. Back in 2008 I went to a Mack engine class on the then new MP engines. In the class there were also techs from some Volvo dealerships. The instructor kept going over injector cup installations. After 4 + hours on injector cups , I asked what’s the big deal with the injector cups, the Volvo techs laughed and said I needed to pay attention because I would be using my new knowledge and they were not kidding.
  10. Mackpro
    I believe there are a few service bulletins on the LR climate systems. I’ll message you for details
  11. Mackpro
    It’s the piston cooling oil pressure sensor. Same part number as the oil pressure sensor on the other side of the engine.
  12. Mackpro
    If your hitting 33 psi of boost then it’s probably not a derate issue due to emissions emissions. Good running MP engines run 33 to almost 40 psi boost. I’ll message for more info.
  13. Mackpro
    The early MP equipped conventional truck had a right and left low beam relay. They later did away with them . They are located in the fuse panel by the clutch pedal. They are locate on the bottom far right. They are the small relays one above another. Position R11 and R12 on the fuse panel. There was a recall on the fuse panel for possible water damage
  14. Mackpro
    On top of the dash , take the 3 screws out of the triangle shaped fuse panel cover . To the left of the fuse panel there and a cluster of relays and also the flasher. The DRL is usually the tallest of the square relays
  15. Mackpro
    If you u plug the turn signal switch does the lights go out? I believe the trolly valve uses the same pressure switch as the foot valve ( by clutch pedal)
  16. Mackpro
    T1 need to be twice that before it will start dosing fuel
  17. Mackpro
    Mack went through 3 or 4 part numbers/ suppliers of the oil pressure sensors. Mack sent out a bulletin warning that some counterfeit sensors even made it into the parts system. It’s possible you got a bad one
  18. Mackpro
    Last I checked, there is no stock at the Mack warehouses and doubt they will be made anymore. Message me your email and I can get you the bulletin. I think it has the earring diagram showing how’s its wired up
  19. Mackpro
    Did your T-1 temp every get hot enough to alolow the 7th injector yo start dosing fuel?
  20. Mackpro
    A 1994 350 VMAC takes 313GC5205P1 injectors. A non VMAC 350 takes 313GC5188P12 injectors
  21. Mackpro
    A 1994 non VMAC EM7 300 takes 313GC5188P10 injectors. The reman number is same but add a X at the end
  22. Mackpro
    Is it V-mac or non-V-mac? On the 300 is ask for e-7 300, em7-300 and e7-300 v-Mac and all 3 use different part numbers
  23. Mackpro
    If a CXP you can press and hold the button under the dash display and it will reAd out the MID codes
  24. Mackpro
    If air fan clutch. You should have 12 volts going to the fan clutch solenoid straight from the fuse box. The other wire ( ground) goes to the engine ecm. The engine ecm makes the ground internally to disengage the fan clutch. When the engine ecm sees hight coolant temp , high AC head pressure or high intake temp it opens the circuit ( takes away the ground ) and the fan clutch engages.
  25. Mackpro
    What kind of fan clutch ? Air or electric?

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