Tell him to get Marvel Mystry oil for lifters. When he is changing his oil amd add a quart instead of oil ( It takes 5 quarts of oil to fill it up so put 4 quarts of oil and 1 quart of marvel mystry oil). Run it about a week or two and it should go away. My air filter fell off and I got trash in my lifters so they tapped real bad. I put Mavel mystrey oil in and a week or two later the tapping went bye bye. Hope this helps.
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2003 Sonic Blue Cobra
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