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Thread: is the caterpillar 3126 motor , good or junk

  1. #1
    Junior Member SHOW GUEST
    Join Date
    Jan 2004

    is the caterpillar 3126 motor , good or junk

    looking at buying a toterhome witha cat 3126 with allison 6 speed auto trans. it has 100,000 miles on it . I thought cat was the best motor you could buy , but it seem like if you own one its going to cost you big time. if you have one tell me the good and bad , should I stay away from buying this ? wanting to travil the U.S.A. give me the good and bad thanks

  2. #2
    Senior Member RACING JUNKIE mopar1968's Avatar
    Join Date
    Dec 2006
    Ok two thing's on this engine-trans,

    1] Check the oil make sure it is not loaded with diesel, If so the rings are shot :!:

    2] Check the trans fluid make sure it isn't burn't :!:

    Otherwise this is a great combo.

    Head's up the true drag race!!

  3. #3


    1st thing take an oil sample to cat, have them check it, if thats a go put it on a truck dyno this will answer all your questions.

  4. Racing Junk

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