Mechanics

RATTLING UNDERNEATH THE CAR

1983 Mercedes Benz 300td • 4 cylinder Automatic • 260,000 miles

I hear a rattling underneath the car after I have been driving for more than 30 minutes. It gets louder and louder. And I hear it more when I press on the gas pedal. I hear it when I'm driving next to a wall or another car, where the sound can bounce off as I'm driving with the windows down.
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Jake
August 6, 2011.



Take a rubber mallot and tap on the exhaust system. Check for loose heat shields or loose internal parts in the catalytic converter.