Squealing from engine bay - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

DSW · 04-16-2023, 08:23 PM

Starts after a couple seconds on start up, Goes away for the most part when on throttle, comes back off throttle. only between ab 500-1000 rpm. The car is tuned if that has anything that may play in. It continues and gets louder after car is stopped. Im lost on what it may be ive never heard this type of sound. The car has oil and its not a belt squeak. video of squeal https://youtube.com/shorts/V6HWCAJrhhY?feature=share

Im unsure what it is or what to look up to find a similar post.
So thank you in advance.

humfrz · 04-16-2023, 08:28 PM

Sounds to me like an idler pulley is running dry.

DSW · 04-16-2023, 09:26 PM

Quote:

Originally Posted by humfrz

Sounds to me like an idler pulley is running dry.

So id just need to grease the bearing for the idler pulley? Thank you!

DSW · 04-16-2023, 09:58 PM

I just looked at the idler pulley and took it off and everything looks fine it shakes a little bit when the car is running but other than that the bearing looks no and has no squealing coming from it when i spin the bearing by hand.

humfrz · 04-17-2023, 01:42 AM

OK, my second guess is that it might be the water pump making that noise, however, that would be unusual on these cars.

I suggest you also make a "stethoscope" out a long handled screwdriver or a metal rod and place one end of it on the alternator and AC compressor to see if you can isolate where the sound is coming from.

Let's wake up ol @Tcoat and see if he has any ideas.

Tcoat · 04-17-2023, 07:04 AM

Vacuum or exhaust leak? It is not a moving part as it briefly continues after the engine is stopped.

Ultramaroon · 04-18-2023, 02:52 AM

Quote:

Originally Posted by Tcoat

Vacuum or exhaust leak? It is not a moving part as it briefly continues after the engine is stopped.

^^^this^^^

OP, my money's on brake booster vacuum leak downstream of the check valve.

Ultramaroon · 04-18-2023, 11:40 AM

Good thing OP posted an excellent recording

Sapphireho · 04-18-2023, 11:44 AM

My vote is vacuum.

Either that or..

Ultramaroon · 04-18-2023, 12:12 PM

Quote:

Originally Posted by Sapphireho

.

04-16-2023, 08:23 PM	#1
DSW Member Join Date: Feb 2023 Drives: 2016 BRZ Location: Washington Posts: 13 Thanks: 3 Thanked 5 Times in 4 Posts Mentioned: 0 Post(s)	Squealing from engine bay Starts after a couple seconds on start up, Goes away for the most part when on throttle, comes back off throttle. only between ab 500-1000 rpm. The car is tuned if that has anything that may play in. It continues and gets louder after car is stopped. Im lost on what it may be ive never heard this type of sound. The car has oil and its not a belt squeak. video of squeal https://youtube.com/shorts/V6HWCAJrhhY?feature=share Im unsure what it is or what to look up to find a similar post. So thank you in advance.

04-17-2023, 07:04 AM	#6
Tcoat Senior Member Join Date: Jul 2014 Drives: 2020 Hakone Location: London, Ont Posts: 69,838 Thanks: 61,656 Thanked 108,295 Times in 46,456 Posts Mentioned: 2499 Post(s)	Vacuum or exhaust leak? It is not a moving part as it briefly continues after the engine is stopped. __________________ Racecar spelled backwards is Racecar, because Racecar.

04-18-2023, 11:40 AM	#8
Ultramaroon not playing cards Join Date: Sep 2014 Drives: a 13 e8h frs Location: vantucky, wa Posts: 32,394 Thanks: 53,054 Thanked 37,230 Times in 19,309 Posts Mentioned: 1118 Post(s)	Good thing OP posted an excellent recording __________________ service manuals

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04-16-2023, 08:28 PM	#2
humfrz Senior Member Join Date: May 2013 Drives: 2013 FR-S, white, MT Location: Puyallup, WA Posts: 30,436 Thanks: 29,833 Thanked 32,866 Times in 16,849 Posts Mentioned: 717 Post(s)	Sounds to me like an idler pulley is running dry.

04-16-2023, 09:58 PM	#4
DSW Member Join Date: Feb 2023 Drives: 2016 BRZ Location: Washington Posts: 13 Thanks: 3 Thanked 5 Times in 4 Posts Mentioned: 0 Post(s)	I just looked at the idler pulley and took it off and everything looks fine it shakes a little bit when the car is running but other than that the bearing looks no and has no squealing coming from it when i spin the bearing by hand.

04-17-2023, 01:42 AM	#5
humfrz Senior Member Join Date: May 2013 Drives: 2013 FR-S, white, MT Location: Puyallup, WA Posts: 30,436 Thanks: 29,833 Thanked 32,866 Times in 16,849 Posts Mentioned: 717 Post(s)	OK, my second guess is that it might be the water pump making that noise, however, that would be unusual on these cars. I suggest you also make a "stethoscope" out a long handled screwdriver or a metal rod and place one end of it on the alternator and AC compressor to see if you can isolate where the sound is coming from. Let's wake up ol @Tcoat and see if he has any ideas.

04-18-2023, 11:44 AM	#9
Sapphireho Famous Potatoes Join Date: Mar 2016 Drives: '15 ultramarine Location: Idaho Posts: 14,097 Thanks: 5,833 Thanked 19,730 Times in 9,284 Posts Mentioned: 163 Post(s)	My vote is vacuum. Either that or..

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