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      10-29-2009, 06:47 PM   #30
FrenchBoy
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Drives: '16 F80 M3
Join Date: Mar 2006
Location: Seattle, WA

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Quote:
Originally Posted by trackfiend View Post
1.1 Knocking type sound at idle
When the engine is at normal operating temperature and depending upon the accessory loads on the engine it is possible a low frequency knocking type noise may be heard in the car. This noise is a characteristic of the engine and is not an indication that there is a defect with the engine. In the event that you receive an inquiry about this noise it is important to reassure the customer that this
noise is a characteristic of this engine. The noise in no way affects the durability of the engine and will not lead to a failure of engine components.
Thanks for this. I have been wondering about this "somewhat cheap sounding" knocking at idle, particularly when the engine it hot.
Glad to know it's as intended, albeit not the best sound.
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