my motor had a knocking/rattling sound..
my mechanic taught me a lil trick..
use a screwdrive as a stethescope..i kno it sounds dorky..but it works..
the tip of the screwdriver on the cover..and yur ear on the end of the handle..
n listen 2 where it is comin from..
i took out the bracket that covers my timing chain..it was cracked..
hope u find the problem and eliminate it!
peace
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