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Weird high pitch sound from engine - E90
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03-02-2019, 09:56 PM | #1 |
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Weird high pitch sound from engine - E90
guys
my bmw e90 2010 is making a weird sound for last few months. most of the times it happens when i start the cat in the morning or when the engine is cold. i have uploaded a sound file that i recorded if you guys can find any clue from that. thanks https://drive.google.com/open?id=1-0...JNIDFmSkkoujB6 |
03-03-2019, 04:53 AM | #3 |
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Given the age, I'd suggest its the harmonic balancer. I have a 2009 E90 and have had the a high-pitched noise for the last couple of years at least.
The dealer replaced a couple of pulleys to no avail. Next step (according to both the dealer and an independent mechanic) is replacing the harmonic balancer.
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2009 E90 320d M-Sport /// 2011.5 E70 X5 xDrive30d
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03-03-2019, 05:29 AM | #5 |
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03-03-2019, 05:54 AM | #6 | |
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03-03-2019, 05:57 AM | #7 |
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I’ll have one up for sale in about a month if you can wait that long or DrJ has a wreck he is parting out. He might have one available
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03-03-2019, 07:04 AM | #8 |
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03-03-2019, 07:35 AM | #9 |
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03-06-2019, 01:20 AM | #12 |
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03-08-2019, 05:11 AM | #13 |
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The audio clip is not great but it sounds more transmission related.
Can you hear it at idle with the car parked? Does the pitch change when you stab the gas pedal quickly or hold revs steady at say 1800rpm? |
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04-06-2019, 02:42 AM | #14 |
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went to see a mechanic today and they said its coming from power steering.
they replaced power steering fluid and asked me to monitor. the sound isn't here anymore but will see how ti goes. |
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04-07-2019, 07:08 PM | #15 | |
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Guess thats possible if the system was leaking and running low |
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04-09-2019, 03:48 AM | #16 |
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