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oil in the intake

Discussion in 'Technical Q&A' started by rizzo308, Aug 9, 2005.

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  1. rizzo308

    rizzo308 F1 Rookie
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    Sep 12, 2004
    2,784
    Perth, Australia
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    riggio
    #1 rizzo308, Aug 9, 2005
    Hi fellow chatters, took the corrugated black rubber hose off my engine 308 gtbi (from injection to intake manifold ) noticed there was oil that had collected in the corrugation of the hose should there be any oil or how much oil should be there cheers phil
     
  2. Verell

    Verell F1 Veteran
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    May 5, 2001
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    Groton, MA
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    Verell Boaen
    #2 Verell, Aug 9, 2005
    Really shouldn't be any oil. Carefully depress the fuel distributor's plate & look to see if there's also oil in the bottom of the distributor.

    Most likely you've got a problem with something clogged in the oil vapor recovery system & recovered oil isn't draining back into the crankcase. Time to remove the hoses & recovery unit & clean everything. Be sure to take pictures & make drawings of where all the hoses go. It's easy to forget & misconnect hoses to the recovery unit.

    Figure out some way to clean the old deposits from the inside of the hoses, or replace the hoses.

    Use mineral spirits, or a citrus solvent. Either are safe for the oil resistant hoses. If you use citrus solvent, make sure the hoses are thoroughly drained & dry before reassembly. Don't use lacquer thinner, acetone, etc. as they're too aggressive & can damage the hoses.
     
  3. Tifosi1

    Tifosi1 Formula 3

    Feb 17, 2002
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    Pearl River, LA
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    Kelly J. Vince
    #3 Tifosi1, Aug 9, 2005
    I had the same problem, you've been putting to much oil in the car and it is blowing our of the crankcase breather tubes into the fuel distrbutor. Clean your air cleaner housing too.

    Kelly
     
  4. rizzo308

    rizzo308 F1 Rookie
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    riggio
    #4 rizzo308, Aug 9, 2005
    verell have checked f/ dist there dont look like there's any oil in there but there is small amount of oil in bottom of air cleaner also vapor recovery system is this what you guys call the blow -by sytem thanks for your input phil
     
  5. wolftalk

    wolftalk Formula Junior

    Jan 27, 2004
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    san franciso area
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    phil
    #5 wolftalk, Aug 9, 2005
    my guess is you have an air leak into the oil vapor recovery system. Since the oil vapor system bypasses the air filter element, a leak is an easy airflow path and it will pull oil along with the air.

    The most likely place is the oil drain hose that runs from the bottom of the oil vapor separator canister (bolted to the bell housing) to the sump.

    On the 308, this hose makes a right angle bend where it connects to sump.
    With age, heat, and oil deterioration, the hose cracks at the bend.

    Look above where the shift shaft enters the oil pan...that where the drain hose bends/connects.
     
  6. Verell

    Verell F1 Veteran
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    May 5, 2001
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    Verell Boaen
    #6 Verell, Aug 9, 2005
    Wheather an air leak or clogging, it's most likely vapor recovery related.

    Yes, the oil vapor recovery system is intended to provide crankcase ventilation & vent 'blow-by'. It's supposed to separate out the oil & return it to the crankcase, while any residual vapors get run thru the throttle body & burned with the gas.
     

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