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Making loud knocking noise after changing timing belt S70

posted by  greenS70 on  Sun May 24 09:25 CST 2009
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I replaced timing belt for my S70 and when I started it I could knocking noise all over the head. I hope valves are not bent. Car started fine, no shaking or missing.
Thanks








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    Making loud knocking noise after changing timing belt S70

    posted by  KlausC on  Sun May 24 16:28 CST 2009
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    last visit: Fri Oct 24 10:15 CST 2014
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    Did you recheck your work? What year car? The 1999 and on have variable valve timing. Did you try turning the engine crank 780 degrees before starting and the marks all still line up?

    Klaus
    --
    Common sense trumps a PhD








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      Making loud knocking noise after changing timing belt S70

      posted by  greenS70 on  Sun May 24 17:41 CST 2009
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      The car is 98 S70 T5. I can't find the mark for crank pulley. I can see the mark for crank pulley to line up (on cover) but can't find the mark for crank pulley. Is it behind serpentine pulley on crank toothed pulley? How does it look like? I could get intake and exhaust line up good, I think it is crank pulley. What do you mean by 780 degrees? Isn't it 720? What if I remove #1 spark plug and turn the crank pulley till piston reaches top? How can I tell if it compression or exhause stroke, by rotor position?
      Thanks








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        Making loud knocking noise after changing timing belt S70

        posted by  KlausC on  Mon May 25 05:07 CST 2009
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        last visit: Fri Oct 24 10:15 CST 2014
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        Finding the little cut out in the valley of the crankshaft gear is difficult, you need a really good shop light.
        Yes, the rotor will point to #1 when it is ready to fire and just before TDC.

        All 5 spark plugs should have been removed for this proceedure, allowing free rotation when manually turning over the engine at least 2 times to go past all of the firing order. 720 degrees plus.

        Klaus
        --
        Common sense trumps a PhD








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          Making loud knocking noise after changing timing belt S70

          posted by  greenS70 on  Mon May 25 07:26 CST 2009
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          Thanks Klaus. I found the marks on crank pulley, 2 little notches on each tooth. I put the valley between 2 notches aligned to the mark on cover. Car starts up fine. Thanks again.







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