Cat 3406b blowing oil out exhaust

Discussion in 'Trucks [ Eighteen Wheelers ]' started by 2DASEA, Jan 14, 2013.

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  1. Jan 15, 2013 #11
    2DASEA

    2DASEA Bobtail Member

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    Jan 14, 2013
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    No it wasn't exposed to sea air, The P.O. lived aboard the whole time and the 100 hrs was evenly spread over the 10 yrs.
     
    2DASEA, Jan 15, 2013
    2DASEA, Jan 15, 2013
    #11
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  3. Jan 17, 2013 #12
    2DASEA

    2DASEA Bobtail Member

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    Jan 14, 2013
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    I think I've got it. Removed valve covers and wiggled exhaust valves and there was plenty of slop. Fired off the engine and peered in Exhaust holes with my flashlight. I saw oil running down the valve stems! I guess the shop that did the head cut a corner or two.....
     
    2DASEA, Jan 17, 2013
    2DASEA, Jan 17, 2013
    #12
  4. Jan 17, 2013 #13
    stranger

    stranger Road Train Member

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    Were the valve stem seals on the valves? That may be the problem, could have been left off or got hard and broke apart from age.

    I had a 12.7 Detroit you could wiggle the valves all over the head, but never smoked or used oil, so the play you feel may not be all that bad.
     
    stranger, Jan 17, 2013
    stranger, Jan 17, 2013
    #13
  5. Jan 17, 2013 #14
    2DASEA

    2DASEA Bobtail Member

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    Jan 14, 2013
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    I didn't notice any. I'll take a better look and let you know.
     
    2DASEA, Jan 17, 2013
    2DASEA, Jan 17, 2013
    #14
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