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Different shape of intake and exhaust valve guides

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  • Different shape of intake and exhaust valve guides

    So I needed to replace an intake valve guide. Don't ask lol. I ordered some and only had one option for intake and exhaust valves. Yes the valves are the same diameter. However the bottom of the guide is a different shape. Does anybody know if I can use the "exhaust guide" shaped guide? What is the difference? Maybe for airflow I'm guessing as the intake guide is more tapered at the bottom.
    The new keeper of Uncle Fester!! 88 5-speed, efi, now with ac!
    1988 LX ~sold~
    1992 Blue GL auto, ac ~sold~
    2008 Nissan altima 3.5sl loaded <lease returned>
    1996 Nissan maxima <sold>
    2002 ford f350 crew cab short bed diesel

    Just remember, it could be worse, you could have a fork in your eye!!





  • #2
    And before somebody says the valves are different sizes. The difference is .0002 as per the ford manual. Outside diameter of the guide appears to be the same as well.
    Last edited by Sandm849; 03-18-2010, 12:58 AM.
    The new keeper of Uncle Fester!! 88 5-speed, efi, now with ac!
    1988 LX ~sold~
    1992 Blue GL auto, ac ~sold~
    2008 Nissan altima 3.5sl loaded <lease returned>
    1996 Nissan maxima <sold>
    2002 ford f350 crew cab short bed diesel

    Just remember, it could be worse, you could have a fork in your eye!!




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    • #3
      Is this for a B3? The B3 uses the same guide for intake and exhaust. The stem diameter is the same, just a different head diameter with the intake being slightly larger.

      Are you saying the new guide is a different shape that the ones in the head now? This could simply be due to the replacement guide being sourced from a different supplier than the OEM guides(?).
      If a hammer doesn't fix it you have an electrical problem




      WWZD
      Zulu Ministries

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      • #4
        B3, B6, B6T, B8 and BP all use exhaust guides as service parts.
        Jim DeAngelis

        kittens give Morbo gas!!



        Bright Blue 93 GL (1.6 8v, 5spd) (Hula-Baloo)
        Performance Red 94 Aspire SE (Stimpson)

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        • #5
          Ok so that would explain it. Thanks all. I was waiting for Jim to fly in!
          The new keeper of Uncle Fester!! 88 5-speed, efi, now with ac!
          1988 LX ~sold~
          1992 Blue GL auto, ac ~sold~
          2008 Nissan altima 3.5sl loaded <lease returned>
          1996 Nissan maxima <sold>
          2002 ford f350 crew cab short bed diesel

          Just remember, it could be worse, you could have a fork in your eye!!




          Comment

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