unknown knocking/clunking sound, whatever you call it.... - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

FR-Sky · 08-01-2017, 02:39 AM

So, it happened couple days to last weeks ago, I can hear the knocking sound/clucking sound in front of the vehicle. It happens when going low speed, and hitting some small bump or little bit bigger bumps. No sound on the high way. So I check the front suspension today, nothing were loose, sway bar, endlinks, coilover, etc....and I have tighten it again, and the sounds still happens.

I have Tein Flex Z,
Whiteline sway bar,
Whiteline endlink,

Any ideas?

BRZ@SGP · 08-01-2017, 08:42 AM

Had it. It clunk at low speed while steering. Wasted days googling for solution. Sent to dealer under warranty. Solved it in 1.5 days. They refuse to tell me what went wrong by giving a lame reply ... like something loose

churchx · 08-01-2017, 09:15 AM

coilover's top nut (and hence clunking in loose ball bearing)?

15limited · 08-01-2017, 09:37 AM

Quote:

Originally Posted by FR-Sky

So, it happened couple days to last weeks ago, I can hear the knocking sound/clucking sound in front of the vehicle. It happens when going low speed, and hitting some small bump or little bit bigger bumps. No sound on the high way. So I check the front suspension today, nothing were loose, sway bar, endlinks, coilover, etc....and I have tighten it again, and the sounds still happens.

I have Tein Flex Z,
Whiteline sway bar,
Whiteline endlink,

Any ideas?

How low do you have your Flex Z's adjusted? The endlinks that came with the adjustable swaybar (both whiteline) we're too long and the swaybar was bottoming out on the front LCA, even using Fortune Autos shortened endlinks I still couldn't clear the control arm :/

Sent from my 2PQ93 using Tapatalk

Shark_Bait88 · 08-01-2017, 09:42 AM

A few things it could be:

1) Lug nuts need to be re-torqued. I know it sounds dumb, because you'd figure you couldn't be so absentminded as to forget to retorque them, but it was what was causing the same clunking for me for a bit. lol

2) Check the stabilizer link nuts, they might also need to be tightened.

3) Could be the shock nut as @churchx mentioned

FR-Sky · 08-01-2017, 10:57 AM

Quote:

Originally Posted by churchx

coilover's top nut (and hence clunking in loose ball bearing)?

I dont think so, the knocking/clunking sound happens during low speed, and when hitting bumps. I checked top nut, it was fine.

[ame="https://www.youtube.com/watch?v=YvKWGjmPKoc"]How to Check a Wheel Bearing (Sound, play in the wheel, ABS light) - YouTube[/ame]
The sound is not similar to this, but might be tho.

FR-Sky · 08-01-2017, 10:59 AM

Quote:

Originally Posted by 15limited

How low do you have your Flex Z's adjusted? The endlinks that came with the adjustable swaybar (both whiteline) we're too long and the swaybar was bottoming out on the front LCA, even using Fortune Autos shortened endlinks I still couldn't clear the control arm :/

Sent from my 2PQ93 using Tapatalk

little bit less than 1 finger gap.
I used fortune auto before, between 1.5-2 fingers, and it was fine.

FR-Sky · 08-01-2017, 11:02 AM

Quote:

Originally Posted by Shark_Bait88

A few things it could be:

1) Lug nuts need to be re-torqued. I know it sounds dumb, because you'd figure you couldn't be so absentminded as to forget to retorque them, but it was what was causing the same clunking for me for a bit. lol

2) Check the stabilizer link nuts, they might also need to be tightened.

3) Could be the shock nut as @churchx mentioned

1) Checked, and re-torqued, problem still persist.
2) Checked, and re-tightened, problem still persist.
3) Checked, and re-tightened, problem still persist.

so frustrating.....sigh

Jasonbot · 08-01-2017, 11:27 AM

It could be coil bind. Usually happens at low speeds and when doing slow turns. Check the collars on the coils.

VIP BRZ · 08-01-2017, 11:35 AM

$100 says its this

http://www.ft86club.com/forums/showthread.php?t=117073

7c8 · 08-01-2017, 11:38 AM

I'm sure I have the same sounds as you with my Bilstein B14 + Raceseng CasCam plates. Only at low speeds and it comes and goes. Usually it gets more frequent the longer I drive or the warmer the weather which hints me at bushings or ball joints. I haven't been able to pin this down, but it is definitely not the swaybar bushings or endlinks, which I originally thought it was. I can rule them out because I've disconnected the swaybars already and the sound was still there.

FR-Sky · 08-01-2017, 11:59 AM

Quote:

Originally Posted by VIP BRZ

$100 says its this

http://www.ft86club.com/forums/showthread.php?t=117073

Checked yesterday, endlink, swaybar, coilover were fine and re-tighten..
Beside, I had the coilover for half years...and it just happened recently...

Thx for the $100...lol jk.

FR-Sky · 08-01-2017, 12:01 PM

Quote:

Originally Posted by 7c8

I'm sure I have the same sounds as you with my Bilstein B14 + Raceseng CasCam plates. Only at low speeds and it comes and goes. Usually it gets more frequent the longer I drive or the warmer the weather which hints me at bushings or ball joints. I haven't been able to pin this down, but it is definitely not the swaybar bushings or endlinks, which I originally thought it was. I can rule them out because I've disconnected the swaybars already and the sound was still there.

Yea, I checked and re-tighten everything and I am quite sure it is not the sway bar/endlinks, etc. I ll check it again, and if I still can't find the problem then I have no choice to find a mechanic =[

7c8 · 08-01-2017, 01:48 PM

Quote:

Originally Posted by FR-Sky

Yea, I checked and re-tighten everything and I am quite sure it is not the sway bar/endlinks, etc. I ll check it again, and if I still can't find the problem then I have no choice to find a mechanic =[

It's quite frustrating. I'm dying to know what it is, so please keep us updated if you find out!

08-01-2017, 02:39 AM	#1
FR-Sky Senior Member Join Date: Dec 2015 Drives: 2013 FR-S 10 series [755] Location: Bay Area, CA Posts: 1,189 Thanks: 385 Thanked 390 Times in 264 Posts Mentioned: 7 Post(s) Tagged: 2 Thread(s)	unknown knocking/clunking sound, whatever you call it.... So, it happened couple days to last weeks ago, I can hear the knocking sound/clucking sound in front of the vehicle. It happens when going low speed, and hitting some small bump or little bit bigger bumps. No sound on the high way. So I check the front suspension today, nothing were loose, sway bar, endlinks, coilover, etc....and I have tighten it again, and the sounds still happens. I have Tein Flex Z, Whiteline sway bar, Whiteline endlink, Any ideas? Last edited by FR-Sky; 08-01-2017 at 03:42 AM.

08-01-2017, 09:42 AM	#5
Shark_Bait88 Senior Member Join Date: Jun 2014 Drives: 2013 Firestorm FR-S Location: Midwest Posts: 1,348 Thanks: 1,670 Thanked 862 Times in 480 Posts Mentioned: 12 Post(s) Tagged: 2 Thread(s)	A few things it could be: 1) Lug nuts need to be re-torqued. I know it sounds dumb, because you'd figure you couldn't be so absentminded as to forget to retorque them, but it was what was causing the same clunking for me for a bit. lol 2) Check the stabilizer link nuts, they might also need to be tightened. 3) Could be the shock nut as @churchx mentioned __________________ "Shark_Bait88, the man who’s spent the most money modding his stock FR-S and it’s still stock." -@jdnguyen

08-01-2017, 11:27 AM	#9
Jasonbot Member Join Date: Feb 2014 Drives: scion FRS Location: Vallejo Posts: 58 Thanks: 14 Thanked 18 Times in 15 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	It could be coil bind. Usually happens at low speeds and when doing slow turns. Check the collars on the coils. Last edited by Jasonbot; 08-01-2017 at 11:30 AM. Reason: A word

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08-01-2017, 08:42 AM	#2
BRZ@SGP Member Join Date: Aug 2016 Drives: BRZ MY17 Location: Singapore Posts: 13 Thanks: 0 Thanked 9 Times in 2 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Had it. It clunk at low speed while steering. Wasted days googling for solution. Sent to dealer under warranty. Solved it in 1.5 days. They refuse to tell me what went wrong by giving a lame reply ... like something loose

08-01-2017, 09:15 AM	#3
churchx Senior Member Join Date: Mar 2015 Drives: 2014 GT86 Location: Latvia, Riga Posts: 4,333 Thanks: 696 Thanked 2,085 Times in 1,436 Posts Mentioned: 53 Post(s) Tagged: 1 Thread(s)	coilover's top nut (and hence clunking in loose ball bearing)?

08-01-2017, 11:35 AM	#10
VIP BRZ Senior Member Join Date: Mar 2016 Drives: 2014 Subaru BRZ Location: CA - San Fernando Valley Posts: 492 Thanks: 242 Thanked 333 Times in 179 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	$100 says its this http://www.ft86club.com/forums/showthread.php?t=117073

08-01-2017, 11:38 AM	#11
7c8 Member Join Date: May 2015 Drives: BRZ Location: Vancouver, BC Posts: 33 Thanks: 5 Thanked 13 Times in 10 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	I'm sure I have the same sounds as you with my Bilstein B14 + Raceseng CasCam plates. Only at low speeds and it comes and goes. Usually it gets more frequent the longer I drive or the warmer the weather which hints me at bushings or ball joints. I haven't been able to pin this down, but it is definitely not the swaybar bushings or endlinks, which I originally thought it was. I can rule them out because I've disconnected the swaybars already and the sound was still there.

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