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Large hex drive bolts (?) between cylinders in heads

Discussion in '2nd Gen. Tacomas (2005-2015)' started by foampile, Aug 8, 2015.

  1. Aug 8, 2015 at 4:58 PM
    #1
    foampile

    #1
    foampile [OP] Well-Known Member

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    What is the purpose of these large hex drive bolts or whatever they are that are located in cylinder heads between each cylinder (so two in each head) ?

    head_hex_bolt.jpg
     
    foampile, Aug 8, 2015
    #1
  2. Aug 8, 2015 at 5:45 PM
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    gasgasman

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    gasgasman Well-Known Member

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    Coolant passage plug.
     
    gasgasman, Aug 8, 2015
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  3. Aug 8, 2015 at 7:15 PM
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    FriscoChl

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    FriscoChl Active Member

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    They are plugs from the casting process.

    P.S There are no coolant passages in the heads them selves.
     
    FriscoChl, Aug 8, 2015
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    foampile[OP] likes this.
  4. Aug 8, 2015 at 8:44 PM
    #4
    landphil

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    landphil Fish are FOOD, not friends!

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    LOL, Say what?
     
    landphil, Aug 8, 2015
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    gasgasman and foampile[OP] like this.
  5. Aug 8, 2015 at 11:02 PM
    #5
    foampile

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    foampile [OP] Well-Known Member

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    There are definitely coolant passages in the heads.
     
    foampile, Aug 8, 2015
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  6. Aug 9, 2015 at 2:04 PM
    #6
    Jimmyh

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    Jimmyh Well-Known Member

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    Further research in needed on you part.

    There are indeed coolant passages in the head.
     
    Jimmyh, Aug 9, 2015
    #6

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