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Directionality of compression piston rings

Discussion in '2nd Gen. Tacomas (2005-2015)' started by foampile, Aug 21, 2022.

  1. Aug 21, 2022 at 3:54 PM
    #1
    foampile

    foampile [OP] Well-Known Member

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    I got new piston rings and #1 (top) doesn't have any dot markers but #2 does on one side (see picture). Is that because #2 is directional (dot side looking up) but #1 is not? Haynes doesn't say anything about it. The original #2 did not have a dot (to make it more confusing).

    piston-ring-direction.jpg
     
    Last edited: Aug 21, 2022
  2. Aug 21, 2022 at 4:09 PM
    #2
    Key-Rei

    Key-Rei Well-Known Member

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    Are they OEM or aftermarket?
     
  3. Aug 21, 2022 at 4:09 PM
    #3
    foampile

    foampile [OP] Well-Known Member

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  4. Aug 21, 2022 at 4:13 PM
    #4
    0xDEADBEEF

    0xDEADBEEF Swaying to the Symphony of Destruction

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    Does it have a bevel?

    689CB570-1D93-4E03-8D53-B08AA3B90F23.jpg
     
  5. Aug 21, 2022 at 4:14 PM
    #5
    foampile

    foampile [OP] Well-Known Member

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    Not really, the profile seems pretty square.

    The dot seems to be the only irregularity
     
  6. Aug 21, 2022 at 4:15 PM
    #6
    Key-Rei

    Key-Rei Well-Known Member

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    Contact the manufacturer then it didn't come with an instruction manual, you *DO NOT* want to get it wrong, could be the difference between a running motor and an impractical paperweight.

    Googling resulted in this but I wouldn't take that as a guarantee and only go by it if you can't get a concrete answer from the manufacturer of ypur rings.

    Screenshot_20220821-191313.jpg
     
  7. Aug 21, 2022 at 4:17 PM
    #7
    0xDEADBEEF

    0xDEADBEEF Swaying to the Symphony of Destruction

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  8. Aug 21, 2022 at 4:32 PM
    #8
    foampile

    foampile [OP] Well-Known Member

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  9. Aug 21, 2022 at 4:35 PM
    #9
    foampile

    foampile [OP] Well-Known Member

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    I just went to the shed and confirmed no beveling, very square profile. The instruction manual says if no dot markers direction doesn't matter.
     

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