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Thread: Getting a long life out your diesel engine

  1. #1
    Sponsor potbuilder's Avatar
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    Default Getting a long life out your diesel engine

    interesting article on marine diesels and how to get a long life out of them.

    http://www.sbmar.com/articles/contin...t_perspective/

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    Quote Originally Posted by potbuilder View Post
    interesting article on marine diesels and how to get a long life out of them.

    http://www.sbmar.com/articles/contin...t_perspective/
    Interesting read...thanks Steve.


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    Yes, it is interesting. I ran his numbers on my motor, and it mapped pretty well. 2.2gph out of a 5.5L motor works out to around 12gph, which is right in the 10-13gph range I run, depending on speed. It underscores the common sense idea that if you want a engine to run better, pull back on the throttle a bit. Interesting as well about how he is not sure how this all applies to common rail and that they should have better statistics which is good to hear.
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    The other thing not mentioned that I think has a huge impact on engine life is warm up and cool down. Cool down is especially important on turbocharged motors.
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    Quote Originally Posted by jrogers View Post
    Yes, it is interesting. I ran his numbers on my motor, and it mapped pretty well. 2.2gph out of a 5.5L motor works out to around 12gph, which is right in the 10-13gph range I run, depending on speed. It underscores the common sense idea that if you want a engine to run better, pull back on the throttle a bit. Interesting as well about how he is not sure how this all applies to common rail and that they should have better statistics which is good to hear.
    funny how engine life is connected to that little red knob on the dash !

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    FWIW, our engine is a Volvo KAD44P diesel, relatively light weight and high RPM, 260 hp from only 3.6 liters (about 72 hp/liter), WOT 3800-3900 RPM.

    It's 15 years old, with 5100 hours so far. About 7 years ago, at about 2200 hours, we started traveling most of the time at 6-6.5 knots, 1300-1400 RPM, rather than on plane at 3300-3400 RPM. It seems to be working - we get 3X the mpg, and the engine still runs like a top. No reason at this point to think it won't go a few thousand more hours.
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    All engines have a magic # of how many gallons of fuel they will run before they die, how fast you burn through those gallons is up to YOU.

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    Quote Originally Posted by NewMoon View Post
    FWIW, our engine is a Volvo KAD44P diesel, relatively light weight and high RPM, 260 hp from only 3.6 liters (about 72 hp/liter), WOT 3800-3900 RPM.

    It's 15 years old, with 5100 hours so far. About 7 years ago, at about 2200 hours, we started traveling most of the time at 6-6.5 knots, 1300-1400 RPM, rather than on plane at 3300-3400 RPM. It seems to be working - we get 3X the mpg, and the engine still runs like a top. No reason at this point to think it won't go a few thousand more hours.
    Make sure to run it up every once in awhile to blow the carbon out of the turbo and aftercooler and to see if you still can get the correct RPM's at WOT.

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    Quote Originally Posted by potbuilder View Post
    Make sure to run it up every once in awhile to blow the carbon out of the turbo and aftercooler and to see if you still can get the correct RPM's at WOT.
    Yup, we do that. Still cruise at 3300 or so part of the time too.
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