Weird rattling sound - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

saik190 · 04-10-2020, 11:49 PM

There's a rattling sound my car makes when it's cold started and goes away once it warms up but when im accelerating I can hear the rattling but its not as loud. It's a 2016 Subaru BRZ, recently did a baffle plate and oil pan replacement. Car runs fine its just the rattling is loud. I tried searching it up but no one seems to have the same problem where it would rattle at cold start, almost disappear once its warmed up and come up again when its accelerating and decelerating high rpm to mid rpm levels~

humfrz · 04-12-2020, 06:23 PM

Welcome to our forum, there, saik190 -

I would guess that there is one of those "skid" plates under the car that is lose or the heat shield is lose.

saik190 · 04-13-2020, 01:46 AM

Quote:

Originally Posted by humfrz

Welcome to our forum, there, saik190 -

I would guess that there is one of those "skid" plates under the car that is lose or the heat shield is lose.

I replaced the headers so it cant be the heat shield. as for the skid plates we for sure tightened it back up, used a impact gun.

humfrz · 04-13-2020, 01:55 AM

Quote:

Originally Posted by saik190

I replaced the headers so it cant be the heat shield. as for the skid plates we for sure tightened it back up, used a impact gun.

Did it make that sound with the OEM header? Some folks have reported that some aftermarket headers allow more if the combustion sounds to come through -

saik190 · 04-13-2020, 02:08 AM

Quote:

Originally Posted by humfrz

Did it make that sound with the OEM header? Some folks have reported that some aftermarket headers allow more if the combustion sounds to come through -

I believe it made that sound when it was oem i don't remember that well because its been a while. My buddy says it might be a blown front pipe but we're not sure.

humfrz · 04-13-2020, 03:13 AM

Quote:

Originally Posted by saik190

I believe it made that sound when it was oem i don't remember that well because its been a while. My buddy says it might be a blown front pipe but we're not sure.

Yep, it could be an exhaust leak, worth checking into -

Glock_86 · 04-13-2020, 04:07 AM

Yeah, that definitely sounds like a exhaust leak. What type of exhaust gasket do you have? It may be that gasket vibrating.

saik190 · 04-25-2020, 06:25 AM

Quote:

Originally Posted by Glock_86

Yeah, that definitely sounds like a exhaust leak. What type of exhaust gasket do you have? It may be that gasket vibrating.

I figured out the problem, it seems my stock front pipe cat has been blown haha, the rattling was the beginning of cat getting loose or blown.

04-10-2020, 11:49 PM	#1
saik190 Junior Member Join Date: Dec 2017 Drives: Hyper Blue Brz Location: Canada Posts: 4 Thanks: 0 Thanked 2 Times in 2 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Weird rattling sound There's a rattling sound my car makes when it's cold started and goes away once it warms up but when im accelerating I can hear the rattling but its not as loud. It's a 2016 Subaru BRZ, recently did a baffle plate and oil pan replacement. Car runs fine its just the rattling is loud. I tried searching it up but no one seems to have the same problem where it would rattle at cold start, almost disappear once its warmed up and come up again when its accelerating and decelerating high rpm to mid rpm levels~

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04-12-2020, 06:23 PM	#2
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)	Welcome to our forum, there, saik190 - I would guess that there is one of those "skid" plates under the car that is lose or the heat shield is lose.

04-13-2020, 04:07 AM	#7
Glock_86 Member Join Date: Apr 2020 Drives: 2013 Scion FR-S Turbo 14PSI Location: Indiana Posts: 32 Thanks: 1 Thanked 7 Times in 7 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Yeah, that definitely sounds like a exhaust leak. What type of exhaust gasket do you have? It may be that gasket vibrating.

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