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coolant level in overflow resevoir

Discussion in 'Technical Chat' started by 09style, Jun 3, 2012.

  1. Jun 3, 2012 at 6:29 AM
    #1
    09style

    09style [OP] Member

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    Hello forum

    Getting some miles on my 09 that I just bought a couple weeks ago. Poking around under the hood, I noticed that the coolant level in the overflow resevoir is only just showing up in the bottom on the tank.
    This is when the vehicle is cold. Do I have to add some coolant????? There is a low and high level indicator on the tank. Im not even close to the low side(once again, when the engine is cold).

    Any heads up on the proper levels of this that I should be seeing would be awesome!!!!!

    be good, and plumbing is not a hobby.:notsure:

    09 base model, 4cyl, manual, 38,000 miles.
     
  2. Jun 3, 2012 at 9:12 AM
    #2
    sparkystaco

    sparkystaco Well-Known Member

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    Should be at the upper level when cold
     
  3. Jun 3, 2012 at 9:14 AM
    #3
    NelsonTacoma

    NelsonTacoma This is my derpawayinator!!!!!

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  4. Jun 3, 2012 at 1:14 PM
    #4
    09style

    09style [OP] Member

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    THANKS!!!! so it should be o.k. to add coolant to the overflow to the high side(when the engine is cold of course)??????

    be good, and plumbing is not a hobbie
     
  5. Jun 4, 2012 at 12:00 AM
    #5
    boshak

    boshak Well-Known Member

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    Yes, add coolant to resi. Make sure its the same coolant and mixture as what's already in the truck.

    Continue to monitor the level... Sounds like you've got a leak somewhere. Check all hoses and ground for any leaks.
     
  6. Jun 4, 2012 at 5:58 AM
    #6
    TherealScuba

    TherealScuba Well-Known Member

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    It should NOT be on the high side with the engine cool. It should be anywhere between low and full. Coolant levels rise as it gets hotter, give that shit a place to go and don't fill all the way to the full line.
    Read your owners manual.
     
  7. Jun 4, 2012 at 9:09 AM
    #7
    09style

    09style [OP] Member

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    I agree therealscuba....

    Not thinkin' that I have a leak.... but I would like to get the level to where it belongs just to make sure. no owners manu. with the truck. I plan to stop by the local dealer to get a gallon and fill the resevoir to the low side when cold.

    thanks for the heads up!!!!!

    be good, and plumbing is not hobby:poking:
     
  8. Jun 4, 2012 at 10:53 AM
    #8
    TherealScuba

    TherealScuba Well-Known Member

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    Coolant can evaporate. I wouldn't worry about it.
     
  9. Jun 4, 2012 at 3:47 PM
    #9
    Janster

    Janster Old & Forgetful

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    Is there white-ish residue around your radiator cap?

    My resevoir was very low and I found my radiator cap was leaking. In fact...I'm on my 3rd cap in 5 years.

    The first 2 Toyota (factory replacements) leaked. I'm currently running an aftermarket cap.
     
  10. Jun 4, 2012 at 3:52 PM
    #10
    DeeKay21

    DeeKay21 Lieutenant Dan.

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    My 2006 TRD Sport was kinda like that too. It was just under the low line when cold, I just added some more coolant until it was in between high and low and its been fine ever since and I think that was like 3 or 4 years ago.
     
  11. Jun 4, 2012 at 3:54 PM
    #11
    BradleyScottETC

    BradleyScottETC Class IV Category 8 Elite VIP Member (Only)

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    This ^

    temperature goes up, pressure goes up.
     
  12. Jun 5, 2012 at 3:29 AM
    #12
    09style

    09style [OP] Member

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    Thanks for all the replies.... I did add some to the overflow..... we will see what happens. The fella at the dealer did inform me of alot of the toyota vehicles will "burp" some air out of the system over time right outta the factory. So I guess its not to unusual to have to add a little to the system.

    No white residue around the cap.... but thanks for that heads up!!!!

    be good, and plumbing is not a hobby :D
     
  13. Jun 10, 2012 at 3:57 PM
    #13
    ecoterragaia

    ecoterragaia Well-Known Member

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    My '06 (4 cyl) was on the bottom line too when I bought it at 18,000 miles. After pulling the skid plate off and checking under the water pump I found a thin white crusty line leading from the weep hole to the bottom of the engine block. Turned out to be a very slow leak caused by bad seals, and the water pump was replaced under warranty.

    The dealership technician said that coolant leaks have become more common recently and that he thinks is because the seals are poorly made.

    Also, it wasn't fast enough to cause any dripping. I couldn't see any signs of it until I pulled the skid plate and looked under the water pump with a very bright flashlight.
     
  14. Jun 10, 2012 at 10:08 PM
    #14
    Fury

    Fury Well-Known Member

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    Hi all.

    The coolant level in the overflow tank can be up to the full line when cold. The tank has room above the full line for fluid expansion when the engine gets up to operating temp.

    Cheers
     
  15. Dec 8, 2015 at 1:52 PM
    #15
    Sazan

    Sazan New Member

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    On many Toyota truck and SUV additives in coolant will react with oxalic acid formed form glycol oxidation to prevent aluminum/metal corrosion what produces small amount of precipitates.

    Temporary small Leaks near weep hole around water pump is normal


    If debris becomes trapped between the mating ring and seal ring a small gap is formed. This allows coolant to bypass the mechanical seal, flow into the fluid catch pocket, and drain out of the weep hole. This condition is temporary and will no longer be present once the debris is crushed or works its way out of the seal. Water pump replacement is not necessary.

    NOTE

    The seal and mating rings are lubricated by the surrounding coolant; a small amount of coolant leakage is normal.

    Here is a link to Toyota technical bulletin, including photos

    http://www.rav4world.com/tsb/2011/T-SB-0117-11.pdf
     
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