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Thread: oil breather line out of rocker cover

  1. 13th October 2006, 07:09 PM #1
    def-90's Avatar
    def-90
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    oil breather line out of rocker cover

    at the moment in my 4BD1 i have the the breather line out of the rocker cover going into the air inlet - after the filter, before the turbo intake. this is dumping large amounts of oil in my turbo and thus leaking out the seals.

    i thought originally that my turbo's seals were gone (turbo was off a RB25)so purchased a new garret meant for the 4BD1 (only $1150 - i thought that was cheap) and have just had that fitted. my mechanic didn't reconnect the breather line back into the air line and said i should try dumping it into a catch can or just 'dump it' to elleviate excess oil going into my turbo.

    we pulled off the breather line to see how much oil came out when running, not a huge amount but with a bit of fumes.

    is this the best way around the problem? as the oil breather went into the air line pre-turbo days.

    cheers
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  2. 13th October 2006, 07:27 PM #2
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    DEFENDERZOOK
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    you can run it into a jar......run the hose in through the lid......then run a hose from the lid to where it should go to.....


    the oil will run into the jar.......but wont be sucked up by the other as it should only just go in through the lid......
    it should act as a separator.......the oil will stay in the jar.....and the fumes will go where they
    are meant to.......disconnecting any type of pollution gear can get you defected and/or fined......
    this way...your pollution gear is still connected nd you simply unscrew the jar and tip it out.....
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  3. 13th October 2006, 07:33 PM #3
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    def-90
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    oil

    cheers defenderzook

    its only a 'weekender' and for my truck i think that is the last of my worries - as for pollution. u think otherwise just run it into a catch can and leave it at that?
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  4. 13th October 2006, 07:46 PM #4
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    check your rocker cover, there should be a blanking plate inside in front of the hole for the scavange pipe. It should be open top and bottom, if its not there or the bottom side is clogged you will get exccess oil drawn out of the head.

    The really simple solution is to get one of those plastic fuel filters that has the intake and outlet on the radius of the ends as apposed to looking like an axle. Cut the hose and plumb it in so that the filter is above the breather outlet on the cover and so that the oil can syphon back from the filter while the engine is off.


    The more complicated solution is to fit the blanking plate.
    Dave

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  5. 13th October 2006, 07:48 PM #5
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    or......just run the hose into the chassis rails......



    permanent rust protection.......
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  6. 16th October 2006, 05:07 PM #6
    Noki 3.9's Avatar
    Noki 3.9
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    Hi, I have had trucks with that engine fitted in them and the breather pipe has hung down the side of the engine and lets the fumes and oil go to the ground. I have a later Isuzu truck now with the over head cam turbo 4.8 litre 4 cyl, and the breather still hangs down the side of the engine and that is the way it came from the factory.
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