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Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain. |
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07-21-2022, 12:05 PM | #1 |
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Subaru BRZ high pitched squeal/whine/buzz
Hello all,
I’m having an issue with my 2015 Subaru BRZ 79k miles and was wondering if anyone had a similar problem they resolved or could shed any light on what I should try next. About 3 months ago I washed the car and when I started it I heard a very slight whine coming from the engine. It became louder with increased rpm. In the following three weeks it increased in intensity to what it is now. I looked everywhere and thought the sound was similar to an alternator bearing going bad. I replaced the alternator but the whine was exactly the same. I then thought it could be the accessory belt, but after replacing the sound was exactly the same. Does anyone have any ideas of what I should try next to diagnose and resolve the issue? Thank you! Heres a link to a video I took this morning demonstrating the issue: https://youtube.com/shorts/m1WtIs_RSPs?feature=share |
07-21-2022, 12:24 PM | #2 |
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The inner part of the AC compressor pulley is not spinning. These are clutched somehow. Wonder if it is smoked.
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07-21-2022, 01:44 PM | #3 |
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Remove the belt and spin stuff by hand. If any of the parts make the slightest noise, replace.
Also, try running it with the input connector of the alternator disconnected. ...the little one.
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07-21-2022, 08:09 PM | #4 |
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Take a long screwdriver and put it on the center bolt of every pulley. Listen for the one that sounds rough. I just upgraded to a set of raceseng pulleys because when i washed my engine bay I'm assuming the cleaner got into the bearing of my idler pulley and within a day or two the bearing started making noise.
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07-21-2022, 09:17 PM | #5 | |
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Quote:
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The Following User Says Thank You to NoHaveMSG For This Useful Post: | soundman98 (07-21-2022) |
07-21-2022, 09:52 PM | #6 |
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...or touch the moving parts
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The Following User Says Thank You to Ultramaroon For This Useful Post: | soundman98 (07-21-2022) |
07-21-2022, 09:59 PM | #7 |
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One of my buddies keeps sending me lathe video's like that and now I am tempted to get naked everytime I run the thing.
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07-21-2022, 10:50 PM | #8 | |
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still a potential spot though. it almost sounds more like a rubbing noise. i know i've heard dozens of 90's GM's that sound exactly like that in the rougher neighborhoods, but never really learned what caused it!
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The Following User Says Thank You to soundman98 For This Useful Post: | NoHaveMSG (07-21-2022) |
07-21-2022, 11:15 PM | #9 |
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It sounds like a power steering pump when the fluid is low.
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The Following User Says Thank You to Ultramaroon For This Useful Post: | soundman98 (07-21-2022) |
07-21-2022, 11:46 PM | #10 |
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modded '15 with a hydraulic steering assist? lol
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The Following User Says Thank You to soundman98 For This Useful Post: | Ultramaroon (07-22-2022) |
07-22-2022, 11:46 AM | #11 |
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Thanks for all the suggestions everyone! Going ti be working on the car tomorrow so will update then
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07-22-2022, 10:04 PM | #12 |
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The Following User Says Thank You to Abaier For This Useful Post: | Ultramaroon (07-23-2022) |
07-22-2022, 10:06 PM | #13 | |
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Quote:
https://youtube.com/shorts/bGSG7JSbUJY?feature=share |
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07-23-2022, 12:13 AM | #14 |
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Haha
That tensioner swing is perfectly normal. Healthy.
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brz, sound, squeal, subaru, whine |
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