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Driveline, Engine & DME Tuning
Talk about driveline improvements, NA tuning and DME tuning your E46 BMW here. This includes diffs, intakes, exhausts, chips, software and OBD tuning.

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Old 12-03-2016, 05:52 PM   #1
CarbonZHP
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Engine whistle at exactly 2500rpm and above

My motor has developed a strange whistle that comes on like an on off switch at 2500rpm and does not go away. Im wondering if this is DISA or Vanos related. The whistle sounds nearly the same all throughout the RPMs but only above 2500 or so. Thanks guys
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Old 12-04-2016, 03:28 PM   #2
cwarel
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LMAO i have the same thing , when its cold outside it does it , I was wondering wtf is that comes from the engine too , but I couldnt find anything that leaking , and it does it in gear only ))
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Old 12-04-2016, 03:41 PM   #3
CarbonZHP
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Was playing with it earlier. Mine does it in neutral as well. Exactly at 2500. It sounds almost like a bearing sound but its so sudden it must be something activating. I believe its VANOS. Will be rebuilding over Christmas.
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Old 12-04-2016, 03:42 PM   #4
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Idk my sounds like whistle
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Old 12-07-2016, 09:42 AM   #5
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So I found out whats wrong with my car , its the tension pulley , squeeking ( happens on start up untill car warms up , and then when i give it gas )
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Old 12-07-2016, 12:05 PM   #6
CarbonZHP
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Not sure if that's what I have. My pulleys are only a year old and there is absolutely no sound before 2500 and then it comes on instantly


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