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cat 1mm 15.8

Discussion in 'Trucks [ Eighteen Wheelers ]' started by jizagui, Dec 10, 2016.

Page 1 of 2
  1. Dec 10, 2016 #1
    jizagui

    jizagui Bobtail Member

    13
    0
    Mar 25, 2014
    0
    I picked up a 1MM out of a 2000 western star am told it dropped a valve my ? is should I keep it and build it or sell and find a 6NZ what I was origanaly looking for its going into a 1986 ex hood 359 also I was told that only difference from a 7cz and a 1mm is the newer block could a guy just get a 6nz block that is lighter and better for leaks and swap the internals thanks
     
    jizagui, Dec 10, 2016
    jizagui, Dec 10, 2016
    #1
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  3. Dec 10, 2016 #2
    wore out

    wore out Numbered Classic

    15,952
    192,999
    Jun 5, 2013
    CHASIN THE DEVIL'S HERD
    0
    If it dropped a valve fix it. Yes you can swap rotating assemblies but you have to use it all. No mismatching parts. Since it's out have the crank checked. I would put a rod in that hole for sure. We out of framed ours 4 years ago and 350k still no leaks.
     
    wore out, Dec 10, 2016
    wore out, Dec 10, 2016
    #2
  4. Dec 10, 2016 #3
    jizagui

    jizagui Bobtail Member

    13
    0
    Mar 25, 2014
    0
    i take it they are as good as the other 3406e's never been around any just been around 5ek's
     
    jizagui, Dec 10, 2016
    jizagui, Dec 10, 2016
    #3
  5. Dec 10, 2016 #4
    wore out

    wore out Numbered Classic

    15,952
    192,999
    Jun 5, 2013
    CHASIN THE DEVIL'S HERD
    0
    The 1MM is basically a 70 pin E model with a bigger rotating assembly. 2WS would be a more fair comparison
     
    wore out, Dec 10, 2016
    wore out, Dec 10, 2016
    #4
    Oxbow Thanks this.
  7. Dec 12, 2016 #5
    Superhauler

    Superhauler TEACHER OF MEN

    12,209
    100,730
    Jan 30, 2010
    keep stroking.
    0
    I have a 1mm in mine. With a Acert crank and industrial liner packs. The 1mm block is 300 lbs heavier than a 7zc or 6nz. It is a stronger block than the 7cz or 6nz. Dont be afraid of it. Very strong engine, fix it and ride.
     
    Superhauler, Dec 12, 2016
    Superhauler, Dec 12, 2016
    #5
    Oxbow and wore out Thank this.
  8. Dec 12, 2016 #7
    jizagui

    jizagui Bobtail Member

    13
    0
    Mar 25, 2014
    0
    after all the positive reaction I am going to keep and use it seems like I came into maybe a good motor I called 2 cat dealers today to get a quote on parts and both said they knew of people wanting to buy if I decided to sell
     
    jizagui, Dec 12, 2016
    jizagui, Dec 12, 2016
    #7
  9. Dec 12, 2016 #7
    Superhauler

    Superhauler TEACHER OF MEN

    12,209
    100,730
    Jan 30, 2010
    keep stroking.
    0
    Just don't dump a bunch of fuel to it. Really don't need to on a 15.8.
     
    Superhauler, Dec 12, 2016
    Superhauler, Dec 12, 2016
    #7
  10. Dec 12, 2016 #8
    Rig Wrench

    Rig Wrench Medium Load Member

    398
    66
    Dec 24, 2010
    northeast
    0
    What else you got done to it. I got an Acert rotating assembly (with low comp pistons) goin in a 6nz block. Tryin to decide what to do with the rest of it to finish it off....
     
    Rig Wrench, Dec 12, 2016
    Rig Wrench, Dec 12, 2016
    #8
  11. Dec 13, 2016 #9
    Superhauler

    Superhauler TEACHER OF MEN

    12,209
    100,730
    Jan 30, 2010
    keep stroking.
    0
    I had some custom work done to the head for the fire rings. 58 injectors, a big wind mill borg warner and some stuff we are not allowed to say on here.
     
    Superhauler, Dec 13, 2016
    Superhauler, Dec 13, 2016
    #9
    Oxbow and SAR Thank this.
  12. Dec 17, 2016 #10
    Rig Wrench

    Rig Wrench Medium Load Member

    398
    66
    Dec 24, 2010
    northeast
    0
    Did you native any power difference loosing the 5.5 inch pistons going to the 5.4 with the acerts? Doesn't seen like it would be noticeable
     
    Rig Wrench, Dec 17, 2016
    Rig Wrench, Dec 17, 2016
    #10
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