BC Racing Coilovers - Knock? - Page 3 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

pgranberg11 · 07-31-2014, 01:35 PM

so is the general solution to tighten the top hat nut underneath the damping setting?

codec · 02-17-2015, 05:22 AM

Hi i write to you cuz i have the same issue from rear left coilover, i live in italy and i had buy my coilovers from UK...
After few controls BC decide to send to me 2 new rubber top mounts but i am afraid that not fix the problem, i have read who some people had fixed the issue with replacement of internal cartridge,do you know somebody who have fixed this problem with rubber top mounts?
Please can you sent to me any documentation or the mail received from bc racing to talk with reseller for have the same treatment.
There are some news?
I copy here what bc racing have tell to reseller:
"BC have replied to say that recently they modified the C-89 rear top mount so they will send a pair of these rubber rear top mounts for you to try to see if that eliminates the problem. They have said some people have confirmed the noise goes once replacing the .dampers with the new design. They have asked that you please try these and then confirm whether or not you still have the issue as they want to get to the bottom of it for you."

NickGTI32 · 02-24-2015, 12:45 PM

Is there a way to tighten the rear bolt without taking the coil over off of the car?

shifter907 · 02-25-2015, 02:22 PM

Quote:

Originally Posted by NickGTI32

Is there a way to tighten the rear bolt without taking the coil over off of the car?

Peel back your trunk lining, take a ratchet, and tighten it down. Just remove your dampening adjustment knob (if applicable)

Funk · 02-25-2015, 10:09 PM

Air Bags For The Win

turbocat · 02-25-2015, 11:05 PM

I had BC coilovers years ago on my WRX. They began knocking about three months into ownership.

Things to Check...

Tighten Strut shaft top nut.

Check the spherical strut mount bearing for wear.

Check spring preload. 5mm preload on the spring seat is a good starting point.

Check swaybar endlinks

If none of these are your problem, try to recreate the noise by bouncing the car at the corner where the noise is. I eventually tracked the clunking to the struts and it was internal clunking from the shock/struts. They got progressively worse.

In the end my BC coilover valving was shot and one more autocross finished all four struts. They ended up needing full replacement struts. I hope you guys have better luck with yours. Mine lasted about eight months. Rember this was when BC first was released in the US. I hope they have improved since then.

NickGTI32 · 02-26-2015, 10:25 PM

Quote:

Originally Posted by turbocat

I had BC coilovers years ago on my WRX. They began knocking about three months into ownership.

Things to Check...

Tighten Strut shaft top nut.

Check the spherical strut mount bearing for wear.

Check spring preload. 5mm preload on the spring seat is a good starting point.

Check swaybar endlinks

If none of these are your problem, try to recreate the noise by bouncing the car at the corner where the noise is. I eventually tracked the clunking to the struts and it was internal clunking from the shock/struts. They got progressively worse.

In the end my BC coilover valving was shot and one more autocross finished all four struts. They ended up needing full replacement struts. I hope you guys have better luck with yours. Mine lasted about eight months. Rember this was when BC first was released in the US. I hope they have improved since then.

Thanks thats helpful actually ill set some preload I never had set any before...

Any idea if they come out of the box with any preload?

shifter907 · 02-27-2015, 09:28 AM

Quote:

Originally Posted by NickGTI32

Thanks thats helpful actually ill set some preload I never had set any before...

Any idea if they come out of the box with any preload?

Some coilovers do, some don't. If you can spin the spring and all of the perches freely, there's no preload set, but I've heard of some manufacturers shipping their products pre-preloaded.

codec · 06-11-2015, 04:49 AM

bc racing have send to me new top mount but the noise continue... i have a question: have somebody tried with rear lower camber arms for fixing the problem?

JPDinCV21 · 09-10-2015, 04:35 PM

hey guys, so i got bc coils about a month ago, i am getting like a squeaking sound in low speeds, and a knocking from the rear left wheel. any ideas?

2JZ-GTE · 11-29-2015, 08:40 PM

Quote:

Originally Posted by JPDinCV21

hey guys, so i got bc coils about a month ago, i am getting like a squeaking sound in low speeds, and a knocking from the rear left wheel. any ideas?

I have the same knocking/clunking sound and occasionally squeaking in low speeds.
Im on Megan Street series.

JPDinCV21 · 12-05-2015, 01:51 PM

Quote:

Originally Posted by 2JZ-GTE

I have the same knocking/clunking sound and occasionally squeaking in low speeds.
Im on Megan Street series.

Yeah i have no idea why it happens

skavengers412 · 12-08-2015, 05:55 PM

Hey, so I bought the bc extreme lows
And I'm getting hate mail out the ass saying they are the cheapest coils put on earth

Can u guys give me some input

winsometang · 12-08-2015, 07:04 PM

Take off the dampening adjustment knob and tighten the top bolt. This fixed the clunking in my coils. Also if the preload is set too loose clunking might occur, try setting the preload to factory specs

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View Poll Results: Do Your Coilovers Knock?
Yes, and I have BC Racing Coilovers.	41	44.09%
Yes, but I do not have BC Racing.	13	13.98%
No.	39	41.94%
Voters: 93. You may not vote on this poll

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07-31-2014, 01:35 PM	#29
pgranberg11 BoostedBRZ Join Date: Mar 2014 Drives: Turbo BRZ Location: IL Posts: 689 Thanks: 171 Thanked 259 Times in 191 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	so is the general solution to tighten the top hat nut underneath the damping setting?

02-17-2015, 05:22 AM	#30
codec Junior Member Join Date: Jan 2015 Drives: gt86 FIRST edition #86 Location: Torino. ITALY Posts: 9 Thanks: 0 Thanked 0 Times in 0 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Hi i write to you cuz i have the same issue from rear left coilover, i live in italy and i had buy my coilovers from UK... After few controls BC decide to send to me 2 new rubber top mounts but i am afraid that not fix the problem, i have read who some people had fixed the issue with replacement of internal cartridge,do you know somebody who have fixed this problem with rubber top mounts? Please can you sent to me any documentation or the mail received from bc racing to talk with reseller for have the same treatment. There are some news? I copy here what bc racing have tell to reseller: "BC have replied to say that recently they modified the C-89 rear top mount so they will send a pair of these rubber rear top mounts for you to try to see if that eliminates the problem. They have said some people have confirmed the noise goes once replacing the .dampers with the new design. They have asked that you please try these and then confirm whether or not you still have the issue as they want to get to the bottom of it for you."

02-24-2015, 12:45 PM	#31
NickGTI32 The Silver Shnerfer Join Date: Nov 2013 Drives: 2013 SWP BRZ 6MT Location: Santa Barbara Posts: 111 Thanks: 31 Thanked 46 Times in 21 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	Is there a way to tighten the rear bolt without taking the coil over off of the car?

02-25-2015, 11:05 PM	#34
turbocat Member Join Date: Feb 2013 Drives: 13 BRZ SSM Location: PA Posts: 98 Thanks: 148 Thanked 55 Times in 36 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	I had BC coilovers years ago on my WRX. They began knocking about three months into ownership. Things to Check... Tighten Strut shaft top nut. Check the spherical strut mount bearing for wear. Check spring preload. 5mm preload on the spring seat is a good starting point. Check swaybar endlinks If none of these are your problem, try to recreate the noise by bouncing the car at the corner where the noise is. I eventually tracked the clunking to the struts and it was internal clunking from the shock/struts. They got progressively worse. In the end my BC coilover valving was shot and one more autocross finished all four struts. They ended up needing full replacement struts. I hope you guys have better luck with yours. Mine lasted about eight months. Rember this was when BC first was released in the US. I hope they have improved since then.

06-11-2015, 04:49 AM	#37
codec Junior Member Join Date: Jan 2015 Drives: gt86 FIRST edition #86 Location: Torino. ITALY Posts: 9 Thanks: 0 Thanked 0 Times in 0 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	bc racing have send to me new top mount but the noise continue... i have a question: have somebody tried with rear lower camber arms for fixing the problem?

09-10-2015, 04:35 PM	#38
JPDinCV21 Member Join Date: Jun 2015 Drives: Subaru BRZ Location: CALI Posts: 61 Thanks: 11 Thanked 7 Times in 7 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	hey guys, so i got bc coils about a month ago, i am getting like a squeaking sound in low speeds, and a knocking from the rear left wheel. any ideas?

12-08-2015, 05:55 PM	#41
skavengers412 Senior Member Join Date: Jun 2015 Drives: 2015 FRS Location: Pittsburgh Posts: 146 Thanks: 4 Thanked 7 Times in 7 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Hey, so I bought the bc extreme lows And I'm getting hate mail out the ass saying they are the cheapest coils put on earth Can u guys give me some input

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