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best way to find top dead center

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  • best way to find top dead center

    OK...

    So I am starting to wonder if my timing is off on my motor. I remember reading a while back about how the timing marks were different on 1.8 which made me start to wonder if cause of my NA6 pulley was on a NB8 motor that maybe my timing is off?

    So my question is other then removing the head to find top dead center. What is people's opinion on using a rod or all thread rod in cyl 1 to find top dead center.
    1988 323 GTX--- The toy now :D
    2008 Mazdaspeed 3::SOLD ----- 1991 BRG NA8 Swap, Turbo::SOLD

  • #2
    Straight piece of wire down the cylinder should work.
    Which marks do you think may be off??
    Sometimes damper pulleys fail/slip so the marks are no longer where theyre
    supposed to be.
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    • #3
      Originally posted by metalman View Post
      Straight piece of wire down the cylinder should work.
      Which marks do you think may be off??
      Sometimes damper pulleys fail/slip so the marks are no longer where theyre
      supposed to be.

      I am thinking the marking on pulley maybe off from the crank. AKA TDC on the pulley may not be TDC. Guess I will look into that tomorrow.
      1988 323 GTX--- The toy now :D
      2008 Mazdaspeed 3::SOLD ----- 1991 BRG NA8 Swap, Turbo::SOLD

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      • #4
        If you need a 1.8 pulley, let me know. I went ahead and got a brand new one for mine (was replacing everything else, why not do everything? lol), but there was nothing wrong with the old one that I could see. You can have it of course. :)

        Originally posted by miata5620
        Eric's Garage ... You buy all the parts I tell you to and you will have a killer car... If you want other parts used your car will suck and it will cost you more...

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        • #5
          This is a non issue, unless of course your pulley is physically damaged or deteriorated.
          DIYAutoTune.com

          | 10AE-T | BEGi S4 | GT2560r | Enthuza | 6UL | MS3Pro PNP|
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          • #6
            You cous always take apart the front cover and look for the mark on the crank.....if you're bored.

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            • #7
              Originally posted by ben91 View Post
              This is a non issue, unless of course your pulley is physically damaged or deteriorated.
              So yea. I took the whole thing apart and physically checked for TDC. The stock pulley was off. I am not sure how that works, but yea the idle is smoother but still have only 10-12 vac.
              1988 323 GTX--- The toy now :D
              2008 Mazdaspeed 3::SOLD ----- 1991 BRG NA8 Swap, Turbo::SOLD

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              • #8
                Originally posted by wildfire0310 View Post
                So yea. I took the whole thing apart and physically checked for TDC. The stock pulley was off. I am not sure how that works, but yea the idle is smoother but still have only 10-12 vac.
                Pulleys can actually fail and spin so the inside no longer matches the outside so to speak. throwing the timing marks off.
                I have sold good used pulleys to people with that issue.
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