Did the car sit for a while before the knocking developed? Did you
recently change to a different kind of oil or filter? The usual
suspect is a worn-out lifter, which you will know because the knock
will go away after 15 or 20 minutes of driving.

If it lasts longer than that, and you don't have any other symptoms,
you may have a problem...

Jim

On Jun 5, 2006, at 5:09 PM, kevin obrien wrote:

> Hello all:
>
> My 1990 Carat just developed a kind of "knocking"
> sound out of the blue.
>
> Power seems OK...oil temp, oil pressure, coolant temp
> all normal...any ideas???
>
> Thanks
> kevin
>
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