Question For Mechanics!

Discussion in 'UPS Discussions' started by ohioUPSer, Nov 15, 2018.

  1. ohioUPSer

    ohioUPSer Member

    What’s the best motor you guys have had luck with? GM, ford, cummins, mercedes? or the old international v8 diesel?
  2. WTFm8

    WTFm8 Active Member

    The ones at my building hate the Mercedes powered cause they said the trucks are put together crappy.

    6.0 GM has oil pump issues with bypass staying open losing oil pressure at idle (experinced once myself now).

    Older 7.3 International/Powerstroke they like cause they’re tanks but dislike cause how slow they are. They prefer the 99+ with bigger turbo/injectors.

    Cummins have boost/excess off-idle smoke issues, the 4bt are almost all slow at our building except 1 that lopes a little at idle and takes off pretty good.

    6.0 Ford is junk.

    New V10 F series is too new to tell.

    I know all the 4bt and older 7.3s at my building don’t have govenors that work.
  3. ohioUPSer

    ohioUPSer Member

    i also forgot, we have a workhorse with a big block chevy with dual exhaust and no governor the motor is bigger than a 454, truck hauls ass but that’s the only one i’ve saw
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  4. Mechanic86

    Mechanic86 Turd Polishing Expert

    Cummins 6bt's perform well here. Also we have CNG here, 5.9 Cummins CNG's are pretty reliable when maintained properly, they have lot of head gasket and side cover gasket leaks but are both fairly easy to repair. GM 6.0 gassers are fine but go through plugs and wires like crazy also a lot of front crank seal leaks.
  5. Redtag

    Redtag Part on order, ok to drive

    I think the isb7 Cummins has been the best motor in our trucks.
  6. Indecisi0n

    Indecisi0n Well-Known Member

    My smart car has been running strong as hell since day one.
  7. 1989

    1989 Well-Known Member

    If it’s so smart, why do you have to drive it?
  8. clean hairy

    clean hairy Well-Known Member

    Any old timers remember the old inline sixes?
    Those were simple as anything to work on?
  9. oldngray

    oldngray nowhere special

    The GMC 292's? Underpowered but reliable. Mechanics could easily rebuild them. Until they stopped having parts in stock.
  10. brostalss

    brostalss Well-Known Member

    I had a Workhorse P12 with a Chevy big block 396. Tons of power. I smoked everyone on the freeway. Loved that truck. Governed at 74mph.
  11. PASinterference

    PASinterference Yes, I know I'm working late.

    You sure it wasn't a 454? 396 died out around 1969 or 1970.
  12. brostalss

    brostalss Well-Known Member

    You could be correct. All I know is that it hauled the mail.
  13. PASinterference

    PASinterference Yes, I know I'm working late.

    I know ups bought a pile of 454s a few years ago real cheap. They are stout!
  14. rod

    rod #1 on Upstates "list"

    300 via Ford
  15. Staydryitsraining

    Staydryitsraining Well-Known Member

    They make 45 an hour right?
  16. cosmo1

    cosmo1 Perhaps. Staff Member

    I tried to kill one for eight months back in the day.

    Couldn't do it.
  17. rod

    rod #1 on Upstates "list"

    That’s suppose to be 300 cubic inch Ford
  18. rod

    rod #1 on Upstates "list"

    They were almost bullet proof. In our center every truck we had in the early days had a 300 cc Ford six
  19. trickpony1

    trickpony1 Well-Known Member

    300 cubic inches
  20. oldngray

    oldngray nowhere special

    When I started my center had a few P600's that were Fords but most were GMC's with 292's. We had some old oddball stuff floating around like some funky P400's and even an old furniture truck.