1. Welcome to Tacoma World!

    You are currently viewing as a guest! To get full-access, you need to register for a FREE account.

    As a registered member, you’ll be able to:
    • Participate in all Tacoma discussion topics
    • Communicate privately with other Tacoma owners from around the world
    • Post your own photos in our Members Gallery
    • Access all special features of the site

2006 Prerunner oil fill cap question

Discussion in '2nd Gen. Tacomas (2005-2015)' started by glwood6, Oct 31, 2009.

  1. Oct 31, 2009 at 12:55 PM
    #1
    glwood6

    glwood6 [OP] Well-Known Member

    Joined:
    Jul 25, 2008
    Member:
    #8125
    Messages:
    1,601
    Gender:
    Male
    First Name:
    Gary
    Albuquerque, NM
    Vehicle:
    '13 MGM AC 4x4 TRD OR
    Husky front mud flaps, OEM bed mat, 3D floor mats, Wet Okole seat covers, fog lights anytime mod, rear diff breather extension, aluminum Relentless tailgate reinforcement, NWexpo corner gussets, 265/75-16 Hankook Dynapro ATM
    Was checking the oil and oil fill cap on the 2006 Prerunner 4.0L I purchased a couple of weeks ago, and noticed a small bit of that light tan colored goo on the oil filler cap. The oil on the dipstick looked perfectly clean, and with the engine running I could see the oil down in the engine through the filler tube squirting and moving around, perfectly clean and clear...

    Is this a big concern? Is the tan colored stuff on the inside of the oil filler cap possibly due to the dealer power washing the engine bay and maybe some water got into that cap and mixed with the oil, or possibly some condensation on the inside of the cap (we recently had some major rain/snow)? I know the engine bay got power washed recently, there's pretty good evidence of water splashing all around.

    I cleaned up the cap and am going to keep an eye on the oil pretty closely for the next few days and see if any of that oil/water mixture seems to reappear. BTW, the engine has 49.6k, and there is no evidence anywhere else of water/oil leaks. Should I look for anything else in particular? Thanks. I'm still a 2nd gen newbie :cool:
     
  2. Oct 31, 2009 at 12:57 PM
    #2
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

    Joined:
    May 8, 2008
    Member:
    #6497
    Messages:
    106,153
    Gender:
    Male
    First Name:
    FlimFlubberJAM
    Tenoe, AZ
    Vehicle:
    2013 Rubicon Unlimited,
    4.10 gears, sliders, and lots of buttons.
    Its from condensation. If you do alot of short trips, condensation can build up and cause that. Pretty normal in colder climates.
     
  3. Oct 31, 2009 at 12:58 PM
    #3
    glwood6

    glwood6 [OP] Well-Known Member

    Joined:
    Jul 25, 2008
    Member:
    #8125
    Messages:
    1,601
    Gender:
    Male
    First Name:
    Gary
    Albuquerque, NM
    Vehicle:
    '13 MGM AC 4x4 TRD OR
    Husky front mud flaps, OEM bed mat, 3D floor mats, Wet Okole seat covers, fog lights anytime mod, rear diff breather extension, aluminum Relentless tailgate reinforcement, NWexpo corner gussets, 265/75-16 Hankook Dynapro ATM
    Great. I was hoping that might be the case.
     
  4. Oct 31, 2009 at 3:50 PM
    #4
    humanoid

    humanoid bite me

    Joined:
    Jun 27, 2007
    Member:
    #1932
    Messages:
    2,744
    Gender:
    Male
    Sunny SoCal
    Vehicle:
    I had a '99 Xtra Cab PreRunner SR5 V6
    Chris is right (like usual), with short trips, the engine hasn't had sufficient time to warm up and thus the moisture hasn't had time to evaporate. If you take shorter trips, I would suggest changing your oil more frequently than if you mostly traveled on highways.
     
  5. Mar 13, 2015 at 9:20 PM
    #5
    mistermanny

    mistermanny Well-Known Member

    Joined:
    Feb 25, 2015
    Member:
    #149565
    Messages:
    197
    Gender:
    Male
    Jalisco, Mexico
    Vehicle:
    05 AC 4x4 2.7 5spd
    OME 883/Nitros
    I checked out a 2010 v6 spd tacoma last weekend, and noticed the same...slight tan build-up under cap.

    I guess it's the heavier tan sludge you should worry about.
     
  6. Mar 14, 2015 at 5:25 AM
    #6
    QChawks

    QChawks Well-Known Member

    Joined:
    Jan 18, 2015
    Member:
    #146678
    Messages:
    764
    Gender:
    Male
    Davenport, IA
    Vehicle:
    2009 TRD Sport DCLB
    Changed the oil in my 09 and I noticed a nickel sized amount.

    No biggee, wiped it off and called it good.
     
To Top