Loud rattling noise at first morning start

2006 BUICK LA CROSSE
103,000 MILES • 3.8L • 6 CYL • 2WD • AUTOMATIC
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BARRY BROMBERG
  • MEMBER
  • 1 POST
For the first start in the morning the car makes a loud rattling noise. It starts well. It runs well. It only does this for the first start in the morning. The noise goes away after about a minute or so.
Sep 13, 2018 at 11:57 PM
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DANNY L
  • ✓Experienced Mechanic
  • 5,648 POSTS
Hello, I am Danny.

Have you taken a look underneath when you first start the car and hear the noise? I sounds like it might be a lose/cracked/defective exhaust system heat shield. If you have a chance it might help to use your phone and make a video to upload here so we can hear the noise. Hope this helps and feel free to ask questions. Thanks for using 2CarPros.
Danny-
Sep 15, 2018 at 2:00 AM
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