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Timing Belt - How long should they last ?

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  • Timing Belt - How long should they last ?

    Hi guys/Gals,

    I did my timing belt at 97K miles, did the whole 9 yards, tensioner belt etc...all the things recommended by the team here.

    I opened up the front cover yesterday and it seems the damn thing is slipping off the cams again...I have 110K miles on it now.

    I see some black hairs etc..and it seems like its about 2mm moved off the origional place onthe cam.....

    Is this normal ? When should I have to change it again ?

    thanks
    95 Triple White 3.4L DOHC Cutlass Supreme Covrt. 98K miles

  • #2
    You replaced all the idler pulleys, the tensioner pulley, AND the tensioner actuator?

    Is the belt running off the end of the cam cogs?

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    • #3
      Mine has done this before. As much as it doesn't really sound normal, I've seen other DOHC do it too. That doesn't make it a good thing though. Mines done it after replacing idlers and tensioner pulley...
      -60v6's 2nd Jon M.
      91 Black Lumina Z34-5 speed
      92 Black Lumina Z34 5 speed (getting there, slowly... follow the progress here)
      94 Red Ford Ranger 2WD-5 speed
      Originally posted by Jay Leno
      Tires are cheap clutches...

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      • #4
        My timing belt tensioner bracket broke and the belt went crazy...oddly enough it didnt break or fall off...
        Lorenzo
        '11 DODGE Challenger R/ T Classic 57M6 Green with Envy "Giant Green Squid"
        '92 PONTIAC Grand Prix SE 34TDCM5 "Red Lobster"

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        • #5
          Yes I did the idler pulleys, the tensioner pulley, AND the tensioner actuator.

          Seems like the belt is running off the cams, and grinding against the TB cover.

          its only a little right now...just wondering if I need to be concerned or not....

          thx
          95 Triple White 3.4L DOHC Cutlass Supreme Covrt. 98K miles

          Comment


          • #6
            Just keep an eye on it, maybe check it once a week if your really concerned. Like I said, I've seen a few DOHC do this, and honestly, I don't think there is a whole lot we can do about it, sadly
            -60v6's 2nd Jon M.
            91 Black Lumina Z34-5 speed
            92 Black Lumina Z34 5 speed (getting there, slowly... follow the progress here)
            94 Red Ford Ranger 2WD-5 speed
            Originally posted by Jay Leno
            Tires are cheap clutches...

            Comment


            • #7
              Originally posted by sunny_8 View Post
              Yes I did the idler pulleys, the tensioner pulley, AND the tensioner actuator.

              Seems like the belt is running off the cams, and grinding against the TB cover.

              its only a little right now...just wondering if I need to be concerned or not....

              thx
              Are your cam cogs bent/dented? The idler pulleys have lips that keep the belt from running too far forward. Your idler pulleys may be messed up or one of the bolts has loosened up..

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