flapping noise - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

meekhotglass · 04-04-2013, 07:41 PM

Has anyone else noticed a flapping noise at higher speeds?

If I'm going 70 or more, it's very noticeable. I drove along side when someone else was driving the car & didn't notice anything obvious... The little mud flap in front of the rear tire was moving a bit, but I'm not sure it was enough to make the noise

any thoughts or experience from the collective?

Yruyur · 04-04-2013, 07:42 PM

My mud flap in the back came partially off and was flapping.

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Cjymiller · 04-04-2013, 08:04 PM

Initially read the thread title as "Fapping Noise"

Yruyur · 04-04-2013, 08:28 PM

Lol

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ftc~brz · 04-04-2013, 08:36 PM

Quote:

Originally Posted by Cjymiller

Initially read the thread title as "Fapping Noise"

thats what I saw.

I hear no flapping or fapping. in mine it sounds like my passenger window is down just a bit, but it's not. And I have a bad habit of hitting the window up button every dang time I hear it.

Hope you find the culprit

midnight23 · 04-04-2013, 08:59 PM

I hear this noise also when I drive near center dividers or walls.

circuithero · 04-04-2013, 09:57 PM

I had something similar on my Si, took me almost a year to figure out. Factory body work was loose in a spot, at over 70 enough turbulence to shake it and cause it to "flap". Sounds like that might be a good place to look ;-)

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mightyt73 · 04-05-2013, 12:29 AM

I hear the same noise in my BRZ. I cannot find out what it is. It seems to have gone away for now though.

Edit - How new is your BRZ? Mine made the sound in my first 100 miles.

86BRZ · 04-05-2013, 01:52 AM

I have the same experience, seems like the mud flap is flapping but only passenger side. I read some say could be the under panel...

marky · 04-05-2013, 02:04 AM

Yup fapping at high speeds sure will make some noise

Yeah check your mud faps studs might of came off could be hanging

meekhotglass · 04-05-2013, 10:36 AM

The rear mud flaps are still connected - seem to be as good as ever. Has anyone modified them to have less play? I'm thinking about using 2 part epoxy or something...

norsamerican · 04-05-2013, 10:59 AM

Check all your tires for rocks stuck in the tread blocks.

immortal_suby · 04-05-2013, 11:31 AM

When I got under the car for my first oil change I noticed 3 places where the fiber undercover isn't tight in the rear where they use shoulder bolts to hold it on. The holes in the undercover are larger than the shoulders on the bolts and there is 3-4mm of play where the undercover can bang against the body. Great source for strange rattles. I had a few spare fuel injector o-rings that fit perfectly to snug the undercover up.

SloS14 · 04-05-2013, 12:20 PM

I get it at around 85mph. Pretty constant but hard to determine where it's coming from.

04-04-2013, 07:41 PM	#1
meekhotglass Member Join Date: Apr 2012 Drives: BRZED! Location: Upstate NY Posts: 22 Thanks: 2 Thanked 2 Times in 2 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	flapping noise Has anyone else noticed a flapping noise at higher speeds? If I'm going 70 or more, it's very noticeable. I drove along side when someone else was driving the car & didn't notice anything obvious... The little mud flap in front of the rear tire was moving a bit, but I'm not sure it was enough to make the noise any thoughts or experience from the collective?

04-04-2013, 07:42 PM	#2
Yruyur Senior Member Join Date: Jun 2012 Drives: Scion fr-s asphalt M/T Location: Phoenix, AZ Posts: 4,192 Thanks: 1,416 Thanked 1,631 Times in 941 Posts Mentioned: 96 Post(s) Tagged: 0 Thread(s)	My mud flap in the back came partially off and was flapping. Sent from my SCH-I535 using Tapatalk 2 __________________

04-04-2013, 08:28 PM	#4
Yruyur Senior Member Join Date: Jun 2012 Drives: Scion fr-s asphalt M/T Location: Phoenix, AZ Posts: 4,192 Thanks: 1,416 Thanked 1,631 Times in 941 Posts Mentioned: 96 Post(s) Tagged: 0 Thread(s)	Lol Sent from my SCH-I535 using Tapatalk 2 __________________

04-05-2013, 10:59 AM	#12
norsamerican Senior Member Join Date: Jan 2013 Drives: WRB BRZ Location: Houston Posts: 539 Thanks: 101 Thanked 233 Times in 112 Posts Mentioned: 5 Post(s) Tagged: 0 Thread(s)	Check all your tires for rocks stuck in the tread blocks. __________________ Avant-Garde Wheels

04-05-2013, 11:31 AM	#13
immortal_suby Senior Member Join Date: Apr 2012 Drives: 2015 BRZ Limited 6MT Location: SC Posts: 113 Thanks: 74 Thanked 31 Times in 22 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	When I got under the car for my first oil change I noticed 3 places where the fiber undercover isn't tight in the rear where they use shoulder bolts to hold it on. The holes in the undercover are larger than the shoulders on the bolts and there is 3-4mm of play where the undercover can bang against the body. Great source for strange rattles. I had a few spare fuel injector o-rings that fit perfectly to snug the undercover up. __________________ 2015 BRZ , 1992 SVX LSL, 2019 ASCENT

04-04-2013, 08:59 PM	#6
midnight23 dying bird under the hood Join Date: Mar 2013 Drives: 2013 SWP Limited BRZ Location: Disneyland, California Posts: 1,331 Thanks: 546 Thanked 451 Times in 295 Posts Mentioned: 34 Post(s) Tagged: 0 Thread(s)	I hear this noise also when I drive near center dividers or walls.

04-04-2013, 09:57 PM	#7
circuithero Member Join Date: Jan 2013 Drives: 2006 Infiniti M45S Location: BC, Canada Posts: 66 Thanks: 10 Thanked 95 Times in 26 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	I had something similar on my Si, took me almost a year to figure out. Factory body work was loose in a spot, at over 70 enough turbulence to shake it and cause it to "flap". Sounds like that might be a good place to look ;-) Sent from my SGH-I717D using Tapatalk 2

04-05-2013, 01:52 AM	#9
86BRZ Senior Member Join Date: Aug 2012 Drives: BRZ Limited arrived on 9/1/2012 Location: Silicon Valley Posts: 563 Thanks: 312 Thanked 145 Times in 105 Posts Mentioned: 8 Post(s) Tagged: 1 Thread(s)	I have the same experience, seems like the mud flap is flapping but only passenger side. I read some say could be the under panel...

04-05-2013, 02:04 AM	#10
marky Senior Member Join Date: Dec 2012 Drives: 2020 BRZ tS #54 Location: san diego ca Posts: 1,142 Thanks: 616 Thanked 824 Times in 407 Posts Mentioned: 15 Post(s) Tagged: 0 Thread(s)	Yup fapping at high speeds sure will make some noise Yeah check your mud faps studs might of came off could be hanging

04-05-2013, 10:36 AM	#11
meekhotglass Member Join Date: Apr 2012 Drives: BRZED! Location: Upstate NY Posts: 22 Thanks: 2 Thanked 2 Times in 2 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	The rear mud flaps are still connected - seem to be as good as ever. Has anyone modified them to have less play? I'm thinking about using 2 part epoxy or something...

04-05-2013, 12:20 PM	#14
SloS14 Senior Member Join Date: Apr 2013 Drives: 2013 FR-S whiteout Location: United States Posts: 726 Thanks: 381 Thanked 652 Times in 256 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	I get it at around 85mph. Pretty constant but hard to determine where it's coming from.

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