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

2008 Tacoma Drain and Fill - Burping??

Discussion in '2nd Gen. Tacomas (2005-2015)' started by rlofthouse, Dec 3, 2020.

  1. Dec 3, 2020 at 7:38 AM
    #1
    rlofthouse

    rlofthouse [OP] Well-Known Member

    Joined:
    Dec 31, 2015
    Member:
    #173642
    Messages:
    61
    Gender:
    Male
    First Name:
    robert
    Vehicle:
    2008 Tacoma
    I'm in the process of replacing the coolant in my 2008 tacoma, following what appears to be the standard process that I found on the below video.. (Drain the liquid, fill up with Toyota 50/50).

    https://www.youtube.com/watch?v=ovdVMTKUmUc

    Now Im reading that air might have got into the system.. is this a serious concern? whats the best way to 'burp'?? I'm seeing multiple ways and would love to understand best practices and more about thought process behind the why..

    1. open the radiator cap, turn on car + rev engine
    2. put car on tilt

    THANKS!
     
  2. Dec 3, 2020 at 7:41 AM
    #2
    nd4spdbh

    nd4spdbh Well-Known Member

    Joined:
    Oct 7, 2013
    Member:
    #114055
    Messages:
    11,252
    Gender:
    Male
    SoCal
    Vehicle:
    13 DCSB TRD OR v6 Auto
    Fill up the rad as much as you can, fill the overflow tank up to the max fill level and go drive it long enough to get the motor up to running temp for quite a bit. Park n let cool and it will suck in any air that got pushed out.
     
  3. Dec 3, 2020 at 7:44 AM
    #3
    Black DOG Lila

    Black DOG Lila Well-Known Member

    Joined:
    Jun 14, 2019
    Member:
    #296344
    Messages:
    6,928
    Virginia
    Vehicle:
    2003 Tacoma SR5 2.7 5 speed 4WD
    Stock. EZ pass.Dump pass.Inspection sticker.Convict printed lic.plates.FG cap.
    Leave the heat and fan on throughout the process.
     
  4. Dec 3, 2020 at 7:46 AM
    #4
    rlofthouse

    rlofthouse [OP] Well-Known Member

    Joined:
    Dec 31, 2015
    Member:
    #173642
    Messages:
    61
    Gender:
    Male
    First Name:
    robert
    Vehicle:
    2008 Tacoma
    Thank you! Do i leave the rad cap on or off??
     
  5. Dec 3, 2020 at 8:23 AM
    #5
    Not a golfer

    Not a golfer Well-Known Member

    Joined:
    Dec 5, 2019
    Member:
    #312561
    Messages:
    171
    Gender:
    Male
    First Name:
    John
    Calgary, Alberta
    Vehicle:
    2012 TRD Sport Double Cab Barcelona Red
    I've always left cap off while running engine. Let engine to heat up enough for thermostat to open (you'll see the flow change in the rad, more movement of fluid). Once the thermostat is open the system is flowing the air will work it's way out. You can increase the rpm (2000 or so) be careful because higher rpm can overflow the rad without the cap on.
     
  6. Dec 4, 2020 at 8:20 AM
    #6
    rlofthouse

    rlofthouse [OP] Well-Known Member

    Joined:
    Dec 31, 2015
    Member:
    #173642
    Messages:
    61
    Gender:
    Male
    First Name:
    robert
    Vehicle:
    2008 Tacoma
    I started the truck this morning (cold morning, 5 deg F) with the radiator cap open. Coolant started overflowing - i immediately stopped the truck. Anyone have any ideas why this is happening? Is this air escaping the system? should i let it overflow??
     
  7. Dec 4, 2020 at 9:59 AM
    #7
    Lester Lugnut

    Lester Lugnut Well-Known Member

    Joined:
    Mar 3, 2010
    Member:
    #32477
    Messages:
    2,823
    Gender:
    Male
    N of Mex-S of Canada-E of LA-W of NC
    Vehicle:
    '15 Tacoma PreRunner V6 SR5 Auto
    Curious as to where your trucks temp gauge was at when the coolant started overflowing.
     
  8. Dec 4, 2020 at 10:14 AM
    #8
    rlofthouse

    rlofthouse [OP] Well-Known Member

    Joined:
    Dec 31, 2015
    Member:
    #173642
    Messages:
    61
    Gender:
    Male
    First Name:
    robert
    Vehicle:
    2008 Tacoma
    Temperature was still pretty cold - i dont believe it had moved much.
     
  9. Dec 4, 2020 at 10:35 AM
    #9
    tak1313

    tak1313 Well-Known Member

    Joined:
    Aug 24, 2020
    Member:
    #338673
    Messages:
    111
    Gender:
    Male
    Lisle 24680. Works great for radiators that have a cap (I also use one of those vacuum the sh*t out until all the hoses collapse then let it suck all the new stuff back in thingy).

    The Lisle is much simpler though. It's essentially a large funnel that seals to the opening and allows you to run the engine until the coolant starts overflowing without overflowing (because it's captured in the funnel). You keep running it until you see all the air get expelled (stops bubbling out). You then have a built in stopper so you can remove the funnel with the excess coolant without spillage. Close the cap (with engine still running). Done.

    Works great, and it's so cheap that I wasn't compelled to make my own.
     
    Monkeybutt2000 likes this.
  10. Dec 4, 2020 at 11:46 AM
    #10
    SethB

    SethB Well-Known Member

    Joined:
    Aug 24, 2010
    Member:
    #42175
    Messages:
    84
    Gender:
    Male
    TDY
    Vehicle:
    2009 DCLB 4X4 Auto
    OME Suspension, SPC UCAs, ARB Bumper, Smittybilt Winch, Ext Brakelines, SOS Sliders, 4x Innovation Rear bumper
  11. Dec 4, 2020 at 11:50 AM
    #11
    rlofthouse

    rlofthouse [OP] Well-Known Member

    Joined:
    Dec 31, 2015
    Member:
    #173642
    Messages:
    61
    Gender:
    Male
    First Name:
    robert
    Vehicle:
    2008 Tacoma
    Just bought! whats causing the overflow? pressure? heat? I looked online and folks mentioned (worse case scenario) a blown head gasket -how would i know if thats the issue? Car runs fine, no issues
     
  12. Dec 4, 2020 at 11:59 AM
    #12
    tak1313

    tak1313 Well-Known Member

    Joined:
    Aug 24, 2020
    Member:
    #338673
    Messages:
    111
    Gender:
    Male
    It starts overflowing as the engine heats up - mostly because of expansion. The funnel allows for capturing that expansion as it heats up without having coolant dump all over the place. Once the thermostat opens, it will drop in level. How much depends on how much air is after the thermostat at that point. Sometimes a lot, sometimes hardly anything.

    The extra coolant in the funnel acts as a reservoir when this happens, so it may drop to the point where you have to add coolant (into the funnel).

    You WANT the funnel to have some coolant as the engine starts flushing the air out as the coolant circulates to keep the radiator completely full. You will then likely see periodic burps/bubbles as the engine runs and flushes air out. Revving the engine a little can also help in this process.

    Once the bubbling stops, use the stopper to seal the funnel, pull it out, and cap it. You can use what's in the funnel to fill into the overflow tank.
     
    B Dog and hx989 like this.
  13. Dec 4, 2020 at 1:05 PM
    #13
    Monkeybutt2000

    Monkeybutt2000 Well-Known Member

    Joined:
    Mar 5, 2015
    Member:
    #150217
    Messages:
    630
    Gender:
    Male
    GET the funnel,best thing ever!
     
  14. Dec 5, 2020 at 6:31 AM
    #14
    B Dog

    B Dog Active Member

    Joined:
    Aug 27, 2017
    Member:
    #228193
    Messages:
    33
    Gender:
    Male
    First Name:
    Barry
    Eugene, Or
    Vehicle:
    2009 silver Tacoma PreRunner Double Cab
    A5693C14-0A1B-4067-B4BD-DDBC90E91643.jpg This worked great for me when I did a complete drain and fill. You can see the level of the coolant just above the angled funnel part. It give plenty of room for the coolant level to rise without overflowing.
     
    lo2hi likes this.
  15. Dec 11, 2020 at 1:26 PM
    #15
    SaratogaTaco

    SaratogaTaco Well-Known Member

    Joined:
    Jun 29, 2020
    Member:
    #332879
    Messages:
    52
    I did the “fill the radiator and reserve tank to max” method. After a long drive I could hear air bubbles pushing out through the reserve tank. I check the levels the next morning. All is good.
     

Products Discussed in

To Top