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Anyone know what this sound is?

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Old Jul 30, 2019
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Anyone know what this sound is?

See attached video

it’s sounds like there is an helicopter flying overhead, but under my hood.

08 civic SI , 180k miles, electronic PS, new alternator, new compressor, good oil level, new starter, any thoughts?

Last edited by Rkane3640; Jul 30, 2019 at 09:07 AM. Reason: Add video
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Old Jul 30, 2019
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Re: Anyone know what this sound is?

Exhaust touching the frame?
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Old Jul 30, 2019
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Re: Anyone know what this sound is?

God I hope so, that would be a lot easier if a fix than anything else. I did push up against a parking barrier the other day, so that is a definite possibility, and other thoughts out there in the forum?
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Old Jul 30, 2019
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Re: Anyone know what this sound is?

I couldn't tell, but if it's following the rpm's....then it could be rod bearing.
How many miles on the engine?
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Old Jul 30, 2019
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Re: Anyone know what this sound is?

180k miles on the motor , it’s an off sound tho, not a click or a knock , kinda like a dull buzz or like, idk it’s hard to describe. The video is hard? It’s not following my RPMs too much, I cannot tell if they are correlated. Don’t listen in the video for when I am revving it, it subsided when revved. Listen in between, that isn’t background noise, it’s the car
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Old Jul 30, 2019
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Re: Anyone know what this sound is?

have you checked your accessory belts?
when was the last time they were replaced?
also, when was the last time the timing belt was replaced?
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Old Jul 30, 2019
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Re: Anyone know what this sound is?

He has postied in wrong forum so that confuses things.

He has a 08 Si so it’s a timing chain.
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Old Jul 30, 2019
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Re: Anyone know what this sound is?

Originally Posted by Slumpertcivic
He has postied in wrong forum so that confuses things.

He has a 08 Si so it’s a timing chain.
lol....
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Old Jul 30, 2019
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Re: Anyone know what this sound is?

moved to the correct section
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Old Jul 30, 2019
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Re: Anyone know what this sound is?

When I put my ear near the top
of the motor it sounds more noticeable, but I cannot tell if it’s coming directly from from the motor or somewhere underneath. The accessory belt is not new but I checked it, looks good. The sound is getting a little more whiney toward day’s end. It almost seems to be coming from around the block or trans. Or just generally down in that area. Could be a perforation in the exhaust but I can’t find it if it is. Could it be a bad water pump? Any other symptoms of that besides a whine? I haven’t had any overheating issues yet. I don’t know I’m just spitballing here
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Old Jul 31, 2019
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Updated video: What is this sound!?

Please see attached, please let’s me know your opinion. What is this sound? More info in video

08 Honda Civic SI
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Old Aug 1, 2019
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Re: Anyone know what this sound is?

Probably exhaust system
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