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Need a Detailed Explanation of How the TRD radiator cap effects the cooling system

Discussion in '2nd Gen. Tacomas (2005-2015)' started by kyleTRDtaco12, Jul 4, 2012.

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  1. Jul 4, 2012 at 11:16 PM
    #1
    kyleTRDtaco12

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    kyleTRDtaco12 [OP] Well-Known Member

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    would it be possible for anyone to please explain why installing a higher pressure radiator cap over the stock, such as the TRD radiator cap P/N:
    $46 PTR04-00000-03 Toyota Radiator Cap - PTR04-00000-03
    PTR04-00000-03 that id like to purchase soon, helps with the engine cooling system performance and just how it actually operates in general?? and if installing it will have any adverse effects on any of the engines parts or components?? thank you so much, this has been a puzzling question ive been asking myself for quite some time now and i just can't seem to fully grasp the science, knowledge and thinking behind it and put two and two together, any info is appreciated, thank you :)
     
    kyleTRDtaco12, Jul 4, 2012
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  2. Jul 4, 2012 at 11:24 PM
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    707tothe907

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    707tothe907 Superior Member

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    Serious...? Isn't it just for looks...
     
    707tothe907, Jul 4, 2012
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  3. Jul 4, 2012 at 11:25 PM
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    IGO4LOW

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    IGO4LOW Well-Known Member

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    It's just for looks dude.
     
    IGO4LOW, Jul 4, 2012
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  4. Jul 4, 2012 at 11:27 PM
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    Khaos

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    Khaos Big Member

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    [insert not sure if serious meme pic here]
     
    Khaos, Jul 4, 2012
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  5. Jul 4, 2012 at 11:27 PM
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    JeremyGrey

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    JeremyGrey Well-Known Member

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    The TRD radiator cap is USELESS without the TRD shifter knob........

    :crapstorm:
     
    JeremyGrey, Jul 4, 2012
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    diabetiktaco and MatBat206 like this.
  6. Jul 4, 2012 at 11:29 PM
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    dman597

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    dman597 Well-Known Member

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    dman597, Jul 4, 2012
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  7. Jul 4, 2012 at 11:34 PM
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    YoaterBoater

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    YoaterBoater Well-Known Member

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    Running tubes, Toolbox
    It reduces friction heat on your tires, gives you the fuel economy of a Volkswagon diesel, and lowers your insurance.
     
    YoaterBoater, Jul 4, 2012
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  8. Jul 5, 2012 at 12:21 AM
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    kyleTRDtaco12

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    kyleTRDtaco12 [OP] Well-Known Member

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    hey common, im honestly being serious here.. im not joking around.. im sure the effect isnt profound but id just like to know for knowledge sake :/ and no, its not just for looks, it raises the boiling point of the coolant , and id like to know exactly what that means and what are the positives and negatives are about that... no need for the sarcasm :(
     
    kyleTRDtaco12, Jul 5, 2012
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  9. Jul 5, 2012 at 12:27 AM
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    RacerAV

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    RacerAV Well-Known Member

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    not sure about the TRD cap but
    there ARE caps that hold higher pressure before letting out fluid to the over flow tank... I've used them in my 240s before... along with better electric fans, and lower temp thermostats. my engine ran cooler, safer, etc...
    Adamo
     
    RacerAV, Jul 5, 2012
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  10. Jul 5, 2012 at 12:28 AM
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    RacerAV

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    RacerAV Well-Known Member

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    forgot...

    with that being said, I've ALSO bought caps that are just billet with a sweet sticker, just like oil caps of the same "performance" value... of ZERO...
     
    RacerAV, Jul 5, 2012
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  11. Jul 5, 2012 at 12:38 AM
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    aptech

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    aptech Jetfixer

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    aptech, Jul 5, 2012
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  12. Jul 5, 2012 at 12:57 AM
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    2TRunner

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    Ahhh, the radiator cap. The most overlooked cooling system component. Pretty neat little things.

    - Rcaps have a PSI rating usually between 13 - 16 PSI. For each Lb of pressure, it will raise the boiling point of the coolant by 3 degrees. A 13 PSI cap will help raise the boiling point of the coolant by almost 40 degrees. It helps improve performance.

    - 2 valves on a Rcap as well. 1 for when the engine is hot, one for when it's cold. One valve will open and allow excess coolant/pressure to bleed off (like into the overflow tank). The other valve is a vacuum valve. When/as the engine cools, a small vacuum is created in the cooling system sucking coolant out of the tank and back into the system.

    So, the TRD cap, a higher pressure cap, will help increase the boiling point of your coolant just a little bit more. Idea being it will help improve C.S. performance.

    Other than that, it's a nice shiny object.

    (Coolant freezing points...The point of the ethelyne glycol (or whatever it's made of) in coolant is to really help the water it's cut with. The coolant in this regard, lowers the freezing point of the water so it dosen't freeze in your shit during a cold night. A typical mix is 50/50. Half coolant concentrate, half water. This gives about a -32 degree rating, VERY TYPICAL. If you get -32 in NJ, you got other problems. People in Alaska may run a 60/40 portion. 60% coolant to 40% water. The freeze protection will go even lower)
     
    2TRunner, Jul 5, 2012
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  13. Jul 5, 2012 at 1:13 AM
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    ColtsTRD

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    ColtsTRD Well-Known Member

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    It's ALL useless w/o a TRD sticker and hood skewp!!!

    All those things combined give ya 75 extra HP!!!
     
    ColtsTRD, Jul 5, 2012
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  14. Jul 5, 2012 at 1:14 AM
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    kyleTRDtaco12

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    kyleTRDtaco12 [OP] Well-Known Member

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    that was some pretty good info, and thanks, but my other question now is, after the one person said "the cap puts extra stress on the cooling system", would toyota and TRD actually design a part that would actually jeopardize the integrity of the vehicles cooling system??.. and my thinking there is probably not because its an actual toyota part... but what is your opinion on that now?? cause im sure there had to be a fair amount of r&d put into the cap.. idk.. thats why im here asking :/
     
    kyleTRDtaco12, Jul 5, 2012
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  15. Jul 5, 2012 at 1:14 AM
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    2TRunner

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    2TRunner Snoop Dad

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    And this...Duh!
     
    2TRunner, Jul 5, 2012
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  16. Jul 5, 2012 at 1:18 AM
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    kyleTRDtaco12

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    kyleTRDtaco12 [OP] Well-Known Member

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    Thank you for all the info chris, very informative, any yes you're right, it is the most overlooked item in the cooling system lol
     
    kyleTRDtaco12, Jul 5, 2012
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  17. Jul 5, 2012 at 1:25 AM
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    2TRunner

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    GL w/ your purchase! Enjoy the truck!
     
    2TRunner, Jul 5, 2012
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  18. Jul 5, 2012 at 1:27 AM
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    Leggo

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    Jst get a new cap at ADAP for 15 bucks with a higher lbs. rating if you want. I am not sure why you want to go higher, usually you go lower when the radiator gets real old and weak.
     
    Leggo, Jul 5, 2012
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  19. Jul 5, 2012 at 8:42 AM
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    aptech

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    aptech Jetfixer

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    read post above.
     
    aptech, Jul 5, 2012
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  20. Jul 5, 2012 at 8:43 AM
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    aptech

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    aptech Jetfixer

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    agree. its up to you.
     
    aptech, Jul 5, 2012
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