MaxxForce Diesel Engine Troubles and Solutions

Mechanics Hub Forums Diesel Engines International (Navistar) MaxxForce Diesel Engine Troubles and Solutions

This topic contains 53 replies, has 1 voice, and was last updated by  chad jordan 7 months, 2 weeks ago.

Viewing 11 posts - 46 through 56 (of 56 total)
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  • #50213 Reply

    Michel Turcotte

    Never buy an Inter maxxforce is shit from American that got no respect!!!!

    #50228 Reply

    Justin Garvin

    I am wanting to purchase a 2008 dump truck in California with a 7.6 Max Force DT with 68000 miles. What do you think about the motor? Can an emissions delete be done and solve any problems?

    #50328 Reply

    chad jordan

    John, have you considered doing a egr delete? It sounds like the main source of failure is the EGR Cooler failing letting coolant into the oil causing dilution and ultimately engine failure.

    #50411 Reply

    Jeremy H

    Need some advice on purchasing a 2013 international with a maxxforce dt466 that the oil sample analysis came back as follows;
    HIGH SODIUM(NA)21, AND POTASSIUM(K)27 INDICATE A COOLANT LEAK. POSITIVE REACTION TO TEST FOR GLYCOL. CHECK FOR CRACKED
    CYLINDER HEAD AND/OR LEAKING GASKET OR SEAL. HIGH IRON(FE)433, ALUMINUM(AL)150, AND CHROMIUM(CR)15 LEVELS MAY INDICATE WEAR
    FROM CYLINDER LINERS, PISTONS, AND RINGS. CHECK FOR SMOKE, BLOW-BY, AND OIL CONSUMPTION.STOP UNIT IMMEDIATELY IN
    ORDER TO CORRECT PROBLEM(S).
    There’s a lot more parameters and numbers on the sample analysis report but these were the flagged ones.
    Any recommendations or information would be helpful with my decision to purchase or not. I would be an end user of the bus and am not a garage or shop that could afford an expensive rebuild. Given the levels indicated would this be minimal wear that with a clean oil change and minor repairs the motor would last or are these high numbers indicating moderate to major internal wear/damage that indicates a rebuild is in the near future? Thanks for any input.

    #50422 Reply

    John Whelan

    Chad I’ve been told about the EGR cooler delete and I am tempted but can’t do it due to being a responsible government representative. If you don’t let the coolant get below the cooler core and keep the oil clean the failures will decrease. We started changing the engine oil and filters every 5000 km (3000 miles) and the results have been great so far. The oil samples are coming back clean which means less sludge to plug everything up.

    #50421 Reply

    John Whelan

    Jeremy don’t buy it! You might have a failed EGR cooler which costs a month’s pay for the average Joe. We have 18 Maxxforces in our fleet and have spent tens of thousands of dollars on the engines and emission systems. Look for a good unit 2006 or older non emissions and you will have a lot less trouble. If you want newer look for a Cummins ISB. Please mark my words I’m talking from experience. Good Luck!

    #50640 Reply

    Angeou

    If your Cummins engine is still under warranty, you can require service if any problems in the engine.

    Cummins engine generator: https://www.dieselgeneratortech.com/cummins/

    #50753 Reply

    Phil Underwood

    We have 3 of these Navistar powered tractors in our fleet. Same story #6 cylinder no compression.
    And obvious other injector problems and puck seals. Crazy how many problems these engines have with under 200k miles on them.

    #50793 Reply

    Chris

    Does anybody know if you can bypass the two vacuum hoses on the EGR valve on a maxxforce diesel engine

    #50972 Reply

    TIM WILKINS

    2013 Navistar 4300 maxforce 7 We have installed 2 front main seals and continue to have a problem.We have the correct tool to install.is there a secret?

    #50924 Reply

    Michael Robinson

    I bought a new 2013 terrastar come with a 6.4 L (389 cu in) MaxxForce 7 turbodiesel V8 around 60,000 miles I had oil pump failure, they warranted it out a new engine…144000 miles same thing. They (rush truck center) give me a 100,000 mile 2 year warranty but now they will not warranty it. The oil pressure had went down and I had them come out and check it they said it was just a sensor 20 minutes later motor cut off. Any legal information out there ?

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