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Old 06-20-2000, 10:06 AM   #1
Scooby Newbie
Member#: 273
Join Date: Sep 1999
Location: San Carlos, CA, 94070
Have a Nice Day? buzzing noise from front undercarriage

When the car is cold in the morning, there is a buzzing noise when I shift gears from I believe the front underside.

I'm assuming it's a leak and when the car warms up, the air is expanding. It sounds like it's coming from the headers. It may be my Stromung in the rear, but I have yet to pinpoint it. The gasket may have come loose.

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Old 06-20-2000, 11:17 AM   #2
Scooby Newbie
Member#: 1421
Join Date: May 2000
Location: Long Island, NY USA
1997 OBSuperSport
Arcadia Green


It may/could be one of the following:

1. MY97 Stromung "lost" its exhaust gasket after a New York Winter. Check the connection in front of the rear axle.

2. ANY of the exhaust heat shielding can be bent easily. Off road or not. This sometimes creates a rattle or hum at certain RPM or Temperature(i.e. cold).

3. Do a search for Manifold/Exhaust leaks. There was a topic recently about a few of the 2.5 blocks having this and covered under warranty.

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Old 06-20-2000, 11:39 AM   #3

Member#: 922
Join Date: Feb 2000
Chapter/Region: MWSOC
Location: Schaumburg, IL
16 WRX (white)
04 FXT (red)


It's probably a heat shield. I just had one start to rattle on me a few days ago at 3,500rpm. Annoying as hell, the dealer will take care of it, though.
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Old 06-20-2000, 05:20 PM   #4
NASIOC Supporter
Member#: 177
Join Date: Aug 1999
Chapter/Region: NWIC
Location: Boise,Idaho,USA
The 93 W/EJ20K
Series 10 FRS


yeah heat shield... need to get mine fixed too....
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