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Thread: ISL Oil Leaks?

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    ISL Oil Leaks?

    Have a question for the group.

    I have a 2005 8.9 ISL in my motor home.

    It appears to be seeping oil from the gear case cover or gear case.

    I was justt wondering if anyone here has any experience with this issue and what can be done about it.


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    Mimic's Avatar

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    Re: ISL Oil Leaks?

    How often do you change the oil?

    I get a leak on mine at around 9k miles, and it goes away when I change the oil at 12k.


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  5. Top Of Page | #3

    Re: ISL Oil Leaks?

    It’s more like a misting of the right side of the engine bay and dribbling on the ground.

    I think it may have started about 8 to 10 thousand miles ago.

    I cleaned the radiator well before the last trip, but I’m sure I’ll need to stay on top of the cleaning to prevent build-up on the radiator.


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