Odd sound at 6k RPM - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

dutchman1 · 12-25-2016, 12:57 AM

On throttle at 6000 rpm, my car makes a noise that sounds like it's coming from below the steering wheel in the dash, or in that general direction. It comes on at about 5900 rpm, is the loudest at 6000-6100, and is gone again by 6500. It is definitely repeatable and happens in 1st, 2nd, and 3rd gear. Probably the other ones too but that'd be a big ticket lol. It sounds like some kind of tapping/knocking but at a much higher frequency than you would hear knock. Almost like a high pitched rattling or scraping noise.

I tried to get a recording of it but can't hear it over the regular engine noise. Did a good bit of searching and didn't find anything that sounded the same.

Is this a normal sound from these engines? A VVT thing or something?

Ultramaroon · 12-25-2016, 03:32 AM

Next time while it's happening try tapping your clutch pedal. Just a little tap. May not be it but if it affects the sound then I can explain that one. 6K is a little high for that specific resonance though.

May also be a loose bolt in your engine bottom cover (skid plate), or one of the heat shields on your exhaust.

dutchman1 · 12-26-2016, 12:51 AM

Nope, doesn't seem to be the slave cylinder spring (assuming that's what you were thinking). Tapping the clutch has no effect. Nor does the reverse lockout seem to be the culprit.

You're probably right, if it's not a common issue it's probably just a heat shield or something. My first oil change I'll look everything over.

If it's something in the engine, which it doesn't sound like, it'll probably get worse. If it it does I'll have it looked at, got a lot of warranty left lol.

Ultramaroon · 12-26-2016, 01:08 AM

Quote:

Originally Posted by dutchman1

Nope, doesn't seem to be the slave cylinder spring (assuming that's what you were thinking). Tapping the clutch has no effect. Nor does the reverse lockout seem to be the culprit.

Ha! Yeah, I was thinking exactly that. Mine sings sometimes at around 4K. Don't remember exactly.

Let us know when you find it. Good luck.

humfrz · 12-26-2016, 03:01 AM

Does it make that noise when the car is stationary or while the car is moving .... or both ...... ??

humfrz

EAGLE5 · 12-26-2016, 03:02 AM

[ame="https://www.youtube.com/watch?v=KAWoP1kncRE"]Dumb And Dumber (1994) - The Most Annoying Sound In The World - YouTube[/ame]

GsxrMe · 12-26-2016, 09:53 PM

Time for an exhaust or turbo? My car is so god damn ungodly loud at 6k, i cant even think.

dutchman1 · 12-26-2016, 10:32 PM

Quote:

Originally Posted by humfrz

Does it make that noise when the car is stationary or while the car is moving .... or both ...... ??

humfrz

Both, it seems to be related to engine speed only, not wheel speed.

Spartarus · 12-26-2016, 10:34 PM

Does your car still have the sound generator tube?

...Because that tube pipes some intake resonance into the cabin in the passenger footwell, under the dash. It can sound pretty strange...

humfrz · 12-27-2016, 12:06 AM

Quote:

Originally Posted by Spartarus

Does your car still have the sound generator tube?

...Because that tube pipes some intake resonance into the cabin in the passenger footwell, under the dash. It can sound pretty strange...

Good thought.

If you have one and it5 hasn't been plugged, you might consider sticking a cork in it.

humfrz

dutchman1 · 12-27-2016, 09:57 PM

Found it! Just a loose bolt on the header heat shield. Crazy to me that I could hear it in the cab over tall the mentioned intake noise.

Thanks for the suggestions everyone

Ultramaroon · 12-27-2016, 10:28 PM

Quote:

Originally Posted by dutchman1

Found it! Just a loose bolt on the header heat shield. Crazy to me that I could hear it in the cab over tall the mentioned intake noise.

How it feels when you find it and fix it.

Congrats!

Lantana frs · 12-28-2016, 01:44 AM

If I were to have an issue with a brand new car, the dealer would be my first stop. Not a message board. Lol. Either way, good job on the find.

Ultramaroon · 12-28-2016, 01:49 AM

I guess you've never had a sloppy mechanic fuck up your shit.

12-25-2016, 12:57 AM	#1
dutchman1 Senior Member Join Date: Nov 2016 Drives: 2017 86 6-Speed Location: Seattle Posts: 138 Thanks: 35 Thanked 74 Times in 36 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Odd sound at 6k RPM On throttle at 6000 rpm, my car makes a noise that sounds like it's coming from below the steering wheel in the dash, or in that general direction. It comes on at about 5900 rpm, is the loudest at 6000-6100, and is gone again by 6500. It is definitely repeatable and happens in 1st, 2nd, and 3rd gear. Probably the other ones too but that'd be a big ticket lol. It sounds like some kind of tapping/knocking but at a much higher frequency than you would hear knock. Almost like a high pitched rattling or scraping noise. I tried to get a recording of it but can't hear it over the regular engine noise. Did a good bit of searching and didn't find anything that sounded the same. Is this a normal sound from these engines? A VVT thing or something?

12-25-2016, 03:32 AM	#2
Ultramaroon not playing cards Join Date: Sep 2014 Drives: a 13 e8h frs Location: vantucky, wa Posts: 32,395 Thanks: 53,053 Thanked 37,228 Times in 19,308 Posts Mentioned: 1117 Post(s) Tagged: 9 Thread(s)	Next time while it's happening try tapping your clutch pedal. Just a little tap. May not be it but if it affects the sound then I can explain that one. 6K is a little high for that specific resonance though. May also be a loose bolt in your engine bottom cover (skid plate), or one of the heat shields on your exhaust. __________________ service manuals

12-26-2016, 09:53 PM	#7
GsxrMe Senior Member Join Date: Jul 2015 Drives: Late 2014 Subaru BRZ Location: Cape Coral, FL Posts: 557 Thanks: 20 Thanked 184 Times in 139 Posts Mentioned: 5 Post(s) Tagged: 2 Thread(s)	Time for an exhaust or turbo? My car is so god damn ungodly loud at 6k, i cant even think. __________________ 2014 Subaru BRZ FBM Turbokit: GTX3076R - ECUTEK HRI FlexFuel tune - FBM 3" Turboback Exhaust - 550cc Injectors - Walbro 485 Fuel Pump - 4bar Map Sensor - FBM Oil Pan - ACT SB7-XTSS - AMSOIL all fluids - Forester XT Oil Cooler - Cusco engine, trans mounts - Whiteline rear differential bushings - Perrin shifter bushing - Firehawk 235/45/17 - AEM Failsafe

12-26-2016, 10:34 PM	#9
Spartarus ...Just add nauseum Join Date: Jan 2015 Drives: 2003 (AP1) S2000 Location: Miami, FL Posts: 546 Thanks: 310 Thanked 785 Times in 335 Posts Mentioned: 19 Post(s) Tagged: 1 Thread(s)	Does your car still have the sound generator tube? ...Because that tube pipes some intake resonance into the cabin in the passenger footwell, under the dash. It can sound pretty strange... __________________ There are many ways to displace. -Spartarus Last edited by Spartarus; 12-26-2016 at 10:47 PM.

12-28-2016, 01:49 AM	#14
Ultramaroon not playing cards Join Date: Sep 2014 Drives: a 13 e8h frs Location: vantucky, wa Posts: 32,395 Thanks: 53,053 Thanked 37,228 Times in 19,308 Posts Mentioned: 1117 Post(s) Tagged: 9 Thread(s)	I guess you've never had a sloppy mechanic fuck up your shit. __________________ service manuals

12-26-2016, 12:51 AM	#3
dutchman1 Senior Member Join Date: Nov 2016 Drives: 2017 86 6-Speed Location: Seattle Posts: 138 Thanks: 35 Thanked 74 Times in 36 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Nope, doesn't seem to be the slave cylinder spring (assuming that's what you were thinking). Tapping the clutch has no effect. Nor does the reverse lockout seem to be the culprit. You're probably right, if it's not a common issue it's probably just a heat shield or something. My first oil change I'll look everything over. If it's something in the engine, which it doesn't sound like, it'll probably get worse. If it it does I'll have it looked at, got a lot of warranty left lol.

12-26-2016, 03:01 AM	#5
humfrz Senior Member Join Date: May 2013 Drives: 2013 FR-S, white, MT Location: Puyallup, WA Posts: 30,432 Thanks: 29,826 Thanked 32,845 Times in 16,844 Posts Mentioned: 715 Post(s) Tagged: 2 Thread(s)	Does it make that noise when the car is stationary or while the car is moving .... or both ...... ?? humfrz

12-27-2016, 09:57 PM	#11
dutchman1 Senior Member Join Date: Nov 2016 Drives: 2017 86 6-Speed Location: Seattle Posts: 138 Thanks: 35 Thanked 74 Times in 36 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Found it! Just a loose bolt on the header heat shield. Crazy to me that I could hear it in the cab over tall the mentioned intake noise. Thanks for the suggestions everyone

12-28-2016, 01:44 AM	#13
Lantana frs Senior Member Join Date: Jun 2016 Drives: 13 frs red Location: Lantana fl Posts: 448 Thanks: 51 Thanked 198 Times in 115 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	If I were to have an issue with a brand new car, the dealer would be my first stop. Not a message board. Lol. Either way, good job on the find.

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