Metal knock underneath car
Thread Starter
Junior Member
Joined: Mar 2004
Posts: 22
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Metal knock underneath car
Hi All,
I need help. My 01 E320 4Matic has this metal knock. I suspect it is metal because when I occassionally turn or go over a pothole/bump, the noise echos and lasts for half a second. I moved the exhaust pipe around but couldn't duplicate the problem.
Any takes or similar experience?
Thanks
I need help. My 01 E320 4Matic has this metal knock. I suspect it is metal because when I occassionally turn or go over a pothole/bump, the noise echos and lasts for half a second. I moved the exhaust pipe around but couldn't duplicate the problem.
Any takes or similar experience?
Thanks
Thread Starter
Junior Member
Joined: Mar 2004
Posts: 22
Likes: 0
Thanks for the response.
I'm thinking, if it is the resonator or cat, shouldn't there be a sound even at idle?
The metal noise only occurs when I turn or hit a pothole, not when idling or going in a stright line without hitting potholes...
I'm thinking, if it is the resonator or cat, shouldn't there be a sound even at idle?
The metal noise only occurs when I turn or hit a pothole, not when idling or going in a stright line without hitting potholes...
Thread Starter
Junior Member
Joined: Mar 2004
Posts: 22
Likes: 0
The noise seem to be on the passenger side, and it seems to be coming from somewhere near the trunk. I had my cat replaced by the dealer 2 years ago already so it is not the rattling noise that i've heard of before. It sounds like a spring or a metal impact... not quite sure. I rock the car up and down but I can't replicate the noise...only on occassional bumps and turns. Any other ideas? Could it be a worn rubber spring stop or something?
