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Oil leak from front

Discussion in '1st Gen. Tacomas (1995-2004)' started by abunai2, Oct 12, 2017.

  1. Oct 12, 2017 at 10:42 PM
    #1
    abunai2

    abunai2 [OP] Member

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    2002 3.4l auto 4x4
    Have a good size oil leak from the front bottom of the motor.
    When at idle, it will drip a little. Maybe one drop every five minites.
    After driving, oil all over the underside if the engine.
    I'm thinking it's the crank seal.
    Question is could the oil pump or oil pan cause this kind of leak????
     
    Last edited: Oct 12, 2017
  2. Oct 12, 2017 at 11:27 PM
    #2
    tony2018

    tony2018 Well-Known Member

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    Hard to tell but if you'v never change out the pan gasket or the crank seal then you best clean up the oil leaks off the engine and investigate where its coming from while the engine is runninig. Flashlight will help in this case.
     
  3. Oct 13, 2017 at 1:37 AM
    #3
    abunai2

    abunai2 [OP] Member

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    I cleaned the oil off with Oil Eater. Letting it dry off over night. It was a mess under there.
    I'm planing on removing the wire housing to get a better look at where it's leaking.
    If it looks to be from behind the lower cover, I may take it off and run the engine.
    I'm just wondering if there's something with the oil pump that might be pushing oil out.
    I'm hoping it's just the front seal.
    I'll also check the PCV valve to be sure it's open.
    Leak started all of a sudden, so something went bad.
    Hate looking for oil leaks..
     
    Dalandser likes this.
  4. Oct 13, 2017 at 6:39 AM
    #4
    Indy

    Indy Master of all I survey.

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    All leaks start suddenly. 1 moment it doesn't leak, next it does. Most leaks actually exist for quite a while before they get bad enough to be noticed.
     
  5. Oct 13, 2017 at 1:06 PM
    #5
    abunai2

    abunai2 [OP] Member

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    Got it all apart. Main seal leak.
    Have to take the belt off yet, so not sure if it popped out or what.
    Seal changed five years ago, same time as the timing belt job.
    I silicone my seals in, so I don't think it popped out.
    Dipstick tube was leaking some.
    No other leaks I can see.
     
  6. Oct 13, 2017 at 10:31 PM
    #6
    abunai2

    abunai2 [OP] Member

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    Got it done. Seal looked ok, but trail of oil from it.
    Ran it for about 15 minutes and no leak.
    Going to let the silicone dry over night and road test tomorrow.
    Older Toyota engines had a rear fiber seal. Never ever saw one that leaked.
    I wish they would bring it back, and make a fiber front seal.
     
  7. Oct 14, 2017 at 12:39 AM
    #7
    DrZ

    DrZ Well-Known Member

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    I'm skeptical about using silicone sealant there. You'd have to get the metal super clean for it to stick, and the seal typically leaks from the inner part of the seal anyway. Toyota doesn't specify that you need it. And it might make it harder to get out next time if it does stick.
     
  8. Oct 14, 2017 at 7:09 AM
    #8
    tony2018

    tony2018 Well-Known Member

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    You added silicone to the crank gasket? Wow,
     
  9. Oct 14, 2017 at 7:54 AM
    #9
    toyrunner

    toyrunner Puddle Jumper

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    Pasadena, Ca.
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    Kings in front, Bilstien Reservoir rears, Custom sway bar disconnects, 265/75 16 BFG AT's, ARB front bumper and FROR rear bumper. Bao-Feng 2 meter radio and Cobra CB
    Adding silicone to the outer ring on a crank seal is a way to ensure the seal does not leak and it won't make it any harder to remove. It actually can help the seal go in easier. It has been done many times by many peoples. I'll add a smear when installing just because.
     
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