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Thread: Turbo oil seals need replaced.

  1. #1
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    oldfastpat's Avatar
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    Default Turbo oil seals need replaced.

    All things being equal,what would cause oil seal to blow? After no or low boost found a plugged cat on a well built 3" system. no smoke yet. Cut off exhaust at cat and ran with just a turn down that solved boost problem.But after driving a while started excessive smoking. (Son got ticket for excessive smoke) that was a year ago. car sat in garage. started right up but smoke and oil from exhaust. so it would appear that no back pressure so to speak was the culprit. its a 57 trim from driftmotion.
    also any feedback on turbo oil/coolant line kit on ebay.
    1988 MKlll Turbo 5 spd.
    Silver
    255/40 17 Kuhmos,new
    less than 100 K miles
    57 trim turbo
    turbo timer
    3" exhaust
    spares from a donor 1991- block ,Head ex studs upgrade,valve seals
    Lexus AFM, 550 injectors.
    stock wheels/1988 (3 left 1 right) 1991 five spoke good shape.
    over 12k invested!


    Got it to hold oil and water. 85k miles just rebuilt, great interior,good wheels and tires,no rust.After tying up loose ends and getting in valuable advise on this site and exhusative testing ( And pressure testing every single component in the intake system) I had an epiphany and found when # 1 son melted pistons and every other component checked and double checked,That the aftermarket 3 inch cat was plugged! I fired it up after a year of sitting,After getting 200.00 ticket for excessive smoke when the turbo went out! It is beyond a doubt one of the best looking cars of the eighties. Its time for a new toy!

  2. #2
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    Default Re: Turbo oil seals need replaced.

    Thanks!
    1988 MKlll Turbo 5 spd.
    Silver
    255/40 17 Kuhmos,new
    less than 100 K miles
    57 trim turbo
    turbo timer
    3" exhaust
    spares from a donor 1991- block ,Head ex studs upgrade,valve seals
    Lexus AFM, 550 injectors.
    stock wheels/1988 (3 left 1 right) 1991 five spoke good shape.
    over 12k invested!


    Got it to hold oil and water. 85k miles just rebuilt, great interior,good wheels and tires,no rust.After tying up loose ends and getting in valuable advise on this site and exhusative testing ( And pressure testing every single component in the intake system) I had an epiphany and found when # 1 son melted pistons and every other component checked and double checked,That the aftermarket 3 inch cat was plugged! I fired it up after a year of sitting,After getting 200.00 ticket for excessive smoke when the turbo went out! It is beyond a doubt one of the best looking cars of the eighties. Its time for a new toy!

  3. #3
    Dang Dude! No Way Man.
    hvyman's Avatar
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    Default Re: Turbo oil seals need replaced.

    ???

    These sections dont get viewed as much.

    Turbos dont like "back pressure." They want a free flowing exhaust.

  4. #4
    Offical SM Expert: Turbochargers
    MDCmotorsports's Avatar
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    Default Re: Turbo oil seals need replaced.

    Pat,
    I didn't see your question until now due to some things being moved around on the forum.
    Turbochargers do not have seals. They have miniature steel piston rings inside. They act more like dams then they do seals. To properly work, they must have pressure on one side (boost or exhaust pressure inside the housings) and vacuum or low pressure on the other (pcv vacuum system inside the bearing housing).
    These "seals" fail due to carbon damage, over oiling, turbine imbalance, or improper pressure to vacuum ratio inside the bearing housing.
    Hope this answered your question(s).
    "Performance is nothing without elegance and elegance is nothing without precision."


    Im here, but the business is gone.

    HOLSET Supra Mafia

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