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Are intake and exhaust valve stems different diameter?

Discussion in '2nd Gen. Tacomas (2005-2015)' started by foampile, Jan 5, 2022.

  1. Jan 5, 2022 at 6:31 PM
    #1
    foampile

    foampile [OP] Well-Known Member

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    I am asking because valve stem seals are sold separately.
     
  2. Jan 5, 2022 at 6:34 PM
    #2
    Bishop84

    Bishop84 Well-Known Member

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    Slightly yes, they also identify with different colours.

    Why do you ask?
     
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  3. Jan 5, 2022 at 6:37 PM
    #3
    foampile

    foampile [OP] Well-Known Member

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  4. Jan 5, 2022 at 6:39 PM
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    Bishop84

    Bishop84 Well-Known Member

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    Never thought much of it haha. Just never mix up the colours.

    I believe it has more to do with the cylinder head than the valve.
     
  5. Jan 5, 2022 at 6:41 PM
    #5
    foampile

    foampile [OP] Well-Known Member

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    why?
     
  6. Jan 5, 2022 at 6:41 PM
    #6
    Bishop84

    Bishop84 Well-Known Member

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    Shape of the stem guide varying from intake to exhuast.

    I'll have a 2GR cylinder head apart tomorrow, I'll try to remember to take a photo of the stems.
     
  7. Jan 5, 2022 at 6:47 PM
    #7
    foampile

    foampile [OP] Well-Known Member

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    Would it be impossible then to fit the intake (narrower) over an exhaust valve (wider) by mistake?
     
  8. Jan 5, 2022 at 6:50 PM
    #8
    Bishop84

    Bishop84 Well-Known Member

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    I don't think they fit. I've never really tried. They appear visually very similar, but usually when doing valve seals I'm extra careful with part locations.

    I believe the larger ones would just spin and it would be obvious when you try to reinstall the valve.
     
    foampile[QUOTED][OP] likes this.
  9. Jan 5, 2022 at 7:12 PM
    #9
    b_r_o

    b_r_o Gnar doggy

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    Why don't you ask the experts over at rock auto
     
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  10. Jan 5, 2022 at 7:15 PM
    #10
    6 gearT444E

    6 gearT444E Certified Electron Pusher

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    maybe ask auto zone, first general question will be valve seals for 4wd or 2wd
     
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  11. Jan 5, 2022 at 7:18 PM
    #11
    Clearwater Bill

    Clearwater Bill Never answer an anonymous letter

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    :rofl::rofl:

    After the auto vs manual question of course. :hattip:
     
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