Quick Question - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

BRZUK · 11-07-2014, 06:47 PM

Hi Guys,

Just a quick question when driving with the car still in the warm up process MOSTLY do you ever hear loud noises from the rear the easiest way to describe it is as if there was rocks banging of each other in the boot/trunk of the car, if so what is this noise?

Thank you

CAMBAM_6 · 11-07-2014, 06:49 PM

Ive heard it also a few time driving to work in the morning...no idea what it is. I thought it was my tires kicking up small rocks in the wheel wells

Foobar · 11-07-2014, 06:49 PM

Do you have an aftermarket exhaust?

Sent from my Nexus 5 using Tapatalk

BRZUK · 11-07-2014, 06:52 PM

Quote:

Originally Posted by Foobar

Do you have an aftermarket exhaust?

Sent from my Nexus 5 using Tapatalk

Yes i have a perrin 2.5 non resonated with catless front pipe and a over pipe.

BRZUK · 11-07-2014, 06:53 PM

Quote:

Originally Posted by CAMBAM_6

Ive heard it also a few time driving to work in the morning...no idea what it is. I thought it was my tires kicking up small rocks in the wheel wells

First time thats what thought but the noise isn't tinny as it would be with small rocks hitting of metal its deep

Idriveft86 · 11-07-2014, 06:56 PM

I would hear 1 knock when I start moving in reverse after warm up. Sry I have no answer to ur q ? LOL

Foobar · 11-07-2014, 08:17 PM

I think it might be the aftermarket exhaust during the cold start routine, someone posted a video of it before. Not sure if it's hitting something or its just the system itself.

Sent from my Nexus 5 using Tapatalk

Tcoat · 11-07-2014, 08:53 PM

Quote:

Originally Posted by Foobar

I think it might be the aftermarket exhaust during the cold start routine, someone posted a video of it before. Not sure if it's hitting something or its just the system itself.

Sent from my Nexus 5 using Tapatalk

Nailed it!
May be a little loose when cold and tightens up as it heats. You would be amazed at how much an exhaust system will expand and contract with temp changes.
My Talon used to do that all the time.
Nothing to worry about.

Ultramaroon · 11-07-2014, 09:07 PM

My vote is rear deck pop. First time I heard it I thought it was something swinging around whacking stuff under the rear bumper. Wife and I kept looking at each other with that "WTF?" expression.

Once I figured it out I got over it. I don't see any reason to go in there digging around bending shit just for some sticky sealant.

Tcoat · 11-07-2014, 10:31 PM

Quote:

Originally Posted by Ultramaroon

My vote is rear deck pop. First time I heard it I thought it was something swinging around whacking stuff under the rear bumper. Wife and I kept looking at each other with that "WTF?" expression.

Once I figured it out I got over it. I don't see any reason to go in there digging around bending shit just for some sticky sealant.

When I first read this I thought it said rear deck "poop"!
Immediately thought of this poor guy.

Ultramaroon · 11-07-2014, 10:37 PM

Quote:

Originally Posted by Tcoat

When I first read this I thought it said rear deck "poop"!
Immediately thought of this poor guy.

Ewwww! You nasty!

Tcoat · 11-07-2014, 10:48 PM

Quote:

Originally Posted by Ultramaroon

Ewwww! You nasty!

.

11-07-2014, 06:47 PM	#1
BRZUK Member Join Date: Nov 2013 Drives: GT86 Location: UK Posts: 54 Thanks: 14 Thanked 15 Times in 7 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	Quick Question Hi Guys, Just a quick question when driving with the car still in the warm up process MOSTLY do you ever hear loud noises from the rear the easiest way to describe it is as if there was rocks banging of each other in the boot/trunk of the car, if so what is this noise? Thank you

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11-07-2014, 06:56 PM	#6
Idriveft86 Member Join Date: Dec 2013 Drives: 2014 Scion FR-S Location: Bergen County, NJ Posts: 47 Thanks: 3 Thanked 8 Times in 8 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	I would hear 1 knock when I start moving in reverse after warm up. Sry I have no answer to ur q ? LOL

11-07-2014, 09:07 PM	#9
Ultramaroon chicken tonight Join Date: Sep 2014 Drives: a 13 e8h frs Location: vantucky, wa Posts: 31,944 Thanks: 52,291 Thanked 36,615 Times in 18,979 Posts Mentioned: 1109 Post(s) Tagged: 9 Thread(s)	My vote is rear deck pop. First time I heard it I thought it was something swinging around whacking stuff under the rear bumper. Wife and I kept looking at each other with that "WTF?" expression. Once I figured it out I got over it. I don't see any reason to go in there digging around bending shit just for some sticky sealant.

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