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Occasional Valve Noise 900 1996

uid 25346's pic
posted by  GT144 on  Wed Dec 22 17:45 CST 2010
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last visit: Fri Oct 24 04:32 CST 2014
[RELATED]

Dear All,

Few weeks ago I posted about my valvetrain clatter. I sent the car to the shop, replaced the valve hushers, adjusted the shims, and got the car back.

It sounded like a new motor, nice and quite...until after about 20kms later, the clatter came back! but it is much lower in decibels this time.

My regular Volvo guy thinks its either a worn valve stem, or a wrist pin. He refused payment, and suggested we take off the head to check. Car has 140k miles, with light pressure turbo.

Symptoms are: 1)No noise when cold.
2)Noise comes off and on while cruising, related to RPMs, but
not related to engine load.
3)Noise is always there on idle, when warm. We removed the
drive belts, and noise is still there.
4)Engine performance not affected by this noise.

I am out of ideas on this one. Even my '74 144's pushrod valvetrain doesn't make such a racket.

Thanks guys, and Merry Christmas.






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