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Top end rattle

Discussion in 'XJ Technical Chat' started by c_4thman, Jul 4, 2009.

  1. c_4thman

    c_4thman New Member

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    I just bought a 1985 XJ700 and it runs good but there is a top end rattle. My guess is improper tension of the timing chain. Any help would be appreciated.
     
    c_4thman, Jul 4, 2009
    #1
  2. bill

    bill Active Member

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    Welcome and congrats on your new find.

    May not be the chain - the valves to make a bit of a clatter which is normal. The best thing to do is pull the valve cover and check the cam chain tension. Check all the valves and replace any shims that are out of spec.

    That way you know any noises you here are normal.
     
    bill, Jul 5, 2009
    #2
  3. c_4thman

    c_4thman New Member

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    Thanks I'll try that
     
    c_4thman, Jul 5, 2009
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  4. WesleyJN1975

    WesleyJN1975 Member

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    This is gonna sound stupid but I had a sound like that. The "PROS" thought it was my cam chain tensioner. It ended up being a loose piece on my friggin' exhaust. Hope this info helps.
     
    WesleyJN1975, Jul 5, 2009
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  5. robvoi

    robvoi Member

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    I NEED help.
    81 XJ 550, starts fine, runs fine ....everything fine ... except when under load there is this load rattle that makes me think that the cams are ripping through the cover any minute.
    Before I capitulate i would like to ask for advice, insights, etc.

    I have, according to bigfitz instructions, loosened and retightened the automatic cam chain tensioner.

    I have 18900 miles on it .. when it idles, no problem, just under load ...drives me nuts, accelerates fine and everything

    Thanks guys
     
    robvoi, Mar 28, 2012
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