Exhaust Valve on BMW 330 (O/T)
11-19-2002, 07:44 AM
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Exhaust Valve on BMW 330 (O/T)
Just sat in traffic behind the 330 Ci and noticed that there is a small valve in the right (of the twin pipes) exhaust.
When the car was still the valve opened....as soon as it moved forward the valve closed.
Quite sad but I was mesmerized
What does it do?? Anybody??
When the car was still the valve opened....as soon as it moved forward the valve closed.
Quite sad but I was mesmerized
What does it do?? Anybody??
11-19-2002, 10:29 AM
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I think the valve may be operated by vacuum from the inlet plenum. It is only there so that it effectively shuts off 50% of the exhaust, thus allowing the car to pass the 'drive by' noise limits set by government.
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