Question about Chevrolet Impala
Not enough info. Does it do it idling? speeding? From your info, it could be a loose timing chain slapping against it's cover .Is there any way to pinpoint the noise? Or if it's loud enough, video tape it and post it.
Posted on Jan 20, 2013
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Posted on Jan 02, 2017
Likely an exhaust heat shield. When the SUV is cold - after sitting for 4+ hours - crawl under the vehicle and see if any of the shields are loose that cover the exhaust pipes. If they are you can use sheet metal screws screwed into the shield and against the exhaust pipeto 'wedge' the shield so it doesn't move.
Posted on Oct 01, 2012
Testimonial: "When I checked the exhaust line, one the metal tie rack was broken. I replaced and the noise went away. Thanks"
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