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Coolant leak pointers

Discussion in '4th Gen 4Runners (2003-2009)' started by Velociraptor4x4, Dec 23, 2020.

  1. Dec 23, 2020 at 2:29 PM
    #1
    Velociraptor4x4

    Velociraptor4x4 [OP] New Member

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    I’ve inherited my wife’s v8 4Runner after selling my 3rd gen Tacoma. When doing maintenance I noticed this coolant leak any ideas as to what it is? I don’t have a garage and it’s getting colder out as time goes on and work has not gave me the time to start figuring it out. It’s on top the motor at the front. Any pointers on where to start would be great.
    51351982-9157-4766-8369-EFBE1941B048.jpg
     
  2. Dec 23, 2020 at 4:19 PM
    #2
    Thatbassguy

    Thatbassguy New member? Really??

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    Is it leaking at the thermostat housing? That's the easiest thing I can think of that would be in that area.
     
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  3. Dec 23, 2020 at 4:50 PM
    #3
    Dillusion

    Dillusion New Member

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    It just looks like a hose and clamp needs to be changed.

    Forgot to mention scrap all the crap off as well with a PLASTIC scraper.
     
    Last edited: Dec 23, 2020
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  4. Dec 23, 2020 at 5:05 PM
    #4
    Velociraptor4x4

    Velociraptor4x4 [OP] New Member

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    From my research it’s the water inlet housing there must be an oring or something in there because it’s a metal to metal connection with no clamp visible
     
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  5. Dec 23, 2020 at 5:14 PM
    #5
    Dillusion

    Dillusion New Member

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    Nothing is metal to metal or it will always leak.

    Gotta be a gasket or o ring that needs to be changed.
     
  6. Dec 23, 2020 at 5:18 PM
    #6
    Thatbassguy

    Thatbassguy New member? Really??

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    Should be an easy fix then. Any auto parts store should have in stock, or be able to get it overnight.

    It's probably just 2 or 3 bolts.
     
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  7. Dec 30, 2020 at 11:28 AM
    #7
    iamincrediboy

    iamincrediboy New Member

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    Has the thermostat/water pump/timing belt renew been done? Cause if so, and this happened, something else could be up... if not and its just a gasket, Amazon is your friend: https://www.amazon.com/gp/product/B00J09FONU/ref=ppx_yo_dt_b_search_asin_image?ie=UTF8&psc=1
    Be mindful though that this is one of two gaskets, and the second isnt a piece you can buy, its a form-in-place gasket; get either genuine Toyota stuff or some Permatex black gasket sealant
     
  8. Dec 30, 2020 at 12:47 PM
    #8
    Velociraptor4x4

    Velociraptor4x4 [OP] New Member

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    The timing belt was done roughly 8 months ago
     
  9. Jan 1, 2021 at 12:50 PM
    #9
    captsolo

    captsolo New Member

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    Don't let it overheat!

    3RD GENERATION'

    Could be you need a new radiator or WP.

    radiators are cheap today. $100 at Amazon

    He doesn't say where it's leaking. It's old. Needs a new radiator.

    What, You think it's leaking from WP?

    He doesn't say its from the thermostat housing?
     
    Last edited: Jan 24, 2021
  10. Jan 6, 2021 at 9:45 AM
    #10
    Toy Yoda

    Toy Yoda New Member

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    3RD GENERATION' ???

    Why would it need a new radiator if there is a small leak around the T-stat housing?
     
  11. Jan 6, 2021 at 10:08 AM
    #11
    Charlievee

    Charlievee New Member

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    Go to a box store, rent a pressure tester and end the guesswork.
     
  12. Feb 3, 2021 at 4:26 PM
    #12
    rns0504

    rns0504 New Member

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    Fur sure get a pressure tester. Around $60 for a basic one and will pay for itself when you don't change the wrong component the first time.
     
  13. Feb 3, 2021 at 7:30 PM
    #13
    Dark Knight

    Dark Knight Get off my lawn

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  14. Feb 5, 2021 at 5:24 PM
    #14
    Velociraptor4x4

    Velociraptor4x4 [OP] New Member

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    It’s the o-ring from the thermostat housing leaking. I’ll keep it topped off and deal with the repair in the spring. Thanks for all the help
     
  15. Feb 7, 2021 at 6:58 AM
    #15
    captsolo

    captsolo New Member

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    One overheat and you can lose the engine and it will never run right. I'd fix it right away.

    You could be on a highway and it might blow all the coolant out!

    Fix it right away. IMO.

    I HAVE A 15 YEAR OLD 4RUNNER AND THE COOLANT LEVEL HAS BEEN THE SAME FOREVER.

    Holds 2 gallons of coolant!

    Take it to a professional. Get a few opinions????
     
    Last edited: Apr 12, 2021 at 1:21 AM
  16. Feb 7, 2021 at 7:52 AM
    #16
    Velociraptor4x4

    Velociraptor4x4 [OP] New Member

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    Luckily it’s not losing coolant quick. From full to half in 2.5 months. It only goes to work and back 10 mile round trip right now
     
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  17. Apr 11, 2021 at 7:11 AM
    #17
    captsolo

    captsolo New Member

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    A new radiator for a 3rd generation as soon as it shows signs of failure, leaking or overheat. Radiators do wear out.
     
  18. Apr 11, 2021 at 8:21 AM
    #18
    Toy Yoda

    Toy Yoda New Member

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    Uh, its a 4th gen 4runner & this is the 4th gen section. A coolant leak at the T-stat housing does NOT require a new radiator! :facepalm:
     
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