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500i engine sound...

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Old Apr 2, 2002 | 08:06 PM
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Those of you who have a 500i, when you take off in 2nd gear from fairly low speed, does your motor make a knocking sound... nothing really loud or nasty sounding, just like a spark knock or something similar...
 
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Old Apr 2, 2002 | 08:18 PM
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Most engines will make a knocking sound if you start off in too high of a gear. It's normal and nothing to worry about. Even a standard car will knock if you pull away in too high of a gear.
 
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Old Apr 2, 2002 | 08:29 PM
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The 400i that I had did not...and the other guys that I ride with dont seem to have it happen to them... I was just wondering if i was crazy... Thanks for the reply...
 
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Old Apr 2, 2002 | 09:07 PM
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Yes, it happens to mine. You can hear it even louder if your in third. When you hear it, just let off the gas and shift.
 
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Old Apr 2, 2002 | 09:14 PM
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Thanks... I was wondering if I was crazy, or if i should say something to the dealer... Thanks again... ooh yeah, lofe the pics of the ride... The AC towers over the rubi... Gotta love it...
 
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Old Apr 3, 2002 | 10:13 AM
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This exact same sound was on my 98 Quadrunner and its on my 500i too. Its a characteristic of the motor. Don't worry about it. Actually I heard an explanation about this somewhere on these forums before.



 
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Old Apr 3, 2002 | 06:29 PM
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Thanks...I was wondering if any of the zuki motors did it as well. Like you said it must be a characteristic of the motor... Thanks to all..
 
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Old Apr 3, 2002 | 11:17 PM
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My 375 does that as well if there's load on the drivetrain and I punch the throttle. Call me crazy, but I've found that by putting higher octane gas in, it seems to help the situation.

EtherNut
 
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Old Apr 4, 2002 | 02:24 PM
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That tapping sound you hear at low RPM's is the compression release cam. It's nothing to worry about.
 
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