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DIY: Do It Yourself
Post here to share or improve your wrench turning skills! All BMW E46 DIY tips, tales, and projects discussed inside. Learn to work on your car and know the right BMW parts you will need!

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Old 01-17-2006, 06:01 PM   #1
Slawless
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Join Date: Dec 2005
Location: wilmington, de usa
Posts: 148
My Ride: 2003 m3
Funny smell after muffler upgrade

Hello I am new to this forum. I used to play with cars in the 70s. I had a firebird. changed heads, cams, transmissions, body work etc, but i haven't played with cars since. Back in those days you had carburators and kettering points. The most sophisticated piece of electronics was the push button radio. So I need you help.


I have a 2003 M3 6sp. about 40K miles on it. For christmas my son got my wife to buy me a new muffler and air intake. Air intake: K&N 69. Muffler: Eisenmenn sport performace 76mm. We put the Air intake on christmas day. The install was easy. The car seemed to do well after. A week later (new years weeked) we put the muffler on. Again the install was no problem. Ever since I put the muffler on, Once the car is warmed up, you get a funny smell. My son describes it as "burnt waffels". At first i though it might be just because it was new. But the smell has persisted. If you sniff around the muffler the smell appears to be comming from the tail pipes. No engine check lights.

any help apprectated.

Steve L
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Old 01-17-2006, 06:43 PM   #2
JamesH81
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Join Date: Sep 2005
Location: Chelmsford, UK
Posts: 1,164
My Ride: Mondeo
could just be the exhaust 'carbonising' at its early stage. once a layer of carbon has been made in the exhaust piping/silencer, the smell will probably disappear. don't quote me on this but it's an educated guess.
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