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

636 · 03-09-2013, 12:13 AM

Let's get a general consensus for BC Racing owners. I have talked with 3 other people who claim that their coilovers are making a knocking noise in the rear over bumps. I'm also hearing this noise. So, post if you have the problem.

If you have different coilovers and still hear the knock(kind of like a pinball noise) comment as well!

NickFRS · 03-09-2013, 01:38 AM

Your top bolt has simply come undone. Common. Go tighten it down.

636 · 03-09-2013, 07:25 AM

Quote:

Originally Posted by NickFRS

Your top bolt has simply come undone. Common. Go tighten it down.

We took out my coils and retightened every bolt..still making the noise.

stancypants · 03-09-2013, 01:12 PM

i mean mine make a lil noise but its aftermarket parts its not going to feel like or sound like stock so it doesnt bother me but thats just me

just86 · 03-09-2013, 01:31 PM

BC are low rating coilovers, you get what you pay for

zex · 03-09-2013, 01:39 PM

Mine makes a squeaky spring noise when it rains really hard

Jesse · 03-09-2013, 03:57 PM

I have BC's on both my cars, can get a slight "knock" in rear only going over bumps at slower speeds, cant find anything loose. dosent bother me.

jammz · 03-09-2013, 07:28 PM

i had BC coilovers on my old car and my friend (who had an Infiniti G37x, G37s and now BMW 328i which he had BC racing on all of them) and I had slight knocking noises aswell. So i'd say its "normal"

whitefrs · 03-09-2013, 08:08 PM

Quote:

Originally Posted by jammz

i had BC coilovers on my old car and my friend (who had an Infiniti G37x, G37s and now BMW 328i which he had BC racing on all of them) and I had slight knocking noises aswell. So i'd say its "normal"

Bcs FTW

636 · 03-09-2013, 08:15 PM

Welp, seems like it's normal. Hahah.

FRS2NV · 03-09-2013, 10:19 PM

Quote:

Originally Posted by just86

BC are low rating coilovers, you get what you pay for

+1
HSD would be my First Choice for what you pay

p00mba · 03-14-2013, 09:10 AM

Quote:

Originally Posted by NickFRS

Your top bolt has simply come undone. Common. Go tighten it down.

This is my first set of BCs and i have the slight noise in the rear, my friend with a Genesis coupe with BCs had the same issue and tightening the top bolt (under the dampening screw) fixed his issue. I will try this tonight and post back.

BTW my issue is only the rear driver side, so i don't believe think the noise is normal, then again if after i tighten this screw doesn't fix the issue i will try to reach out to BC for their input.

speed6sam · 03-14-2013, 10:03 AM

I have one of the first production kits on my car. Zero noises under any conditions and my car is autocrossed/driven hard as much as possible.

You guys with slight noises need to isolate where its coming from and contact BC about it so they can help you figure it out.

7thgear · 03-14-2013, 10:43 AM

try tightning the lower bolt more (way bast the recomended torque spec)

on cars with similar lower attachment points that's usually the issue with aftermarket pieces.

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

03-09-2013, 01:38 AM	#2
NickFRS Senior Member Join Date: Jun 2012 Drives: 2013 Asphalt FRS Location: Gladstone Posts: 1,450 Thanks: 899 Thanked 440 Times in 286 Posts Mentioned: 75 Post(s) Tagged: 0 Thread(s)	Your top bolt has simply come undone. Common. Go tighten it down. __________________ 2013 Sion FRS 2014 Subaru WRX 2014 Subaru XV

03-09-2013, 03:57 PM	#7
Jesse wheel gap Join Date: Jun 2012 Drives: whiteout frs, 04 xrs Location: MA Posts: 555 Thanks: 460 Thanked 249 Times in 153 Posts Mentioned: 10 Post(s) Tagged: 1 Thread(s)	I have BC's on both my cars, can get a slight "knock" in rear only going over bumps at slower speeds, cant find anything loose. dosent bother me. __________________ http://www.ft86club.com/forums/showthread.php?t=20039 - journal --- http://www.flickr.com/photos/29438365@N04/

03-14-2013, 10:43 AM	#14
7thgear i'm sorry, what? Join Date: Jan 2012 Drives: Canada Location: I rock a beat harder than you can beat it with rocks Posts: 4,399 Thanks: 357 Thanked 2,506 Times in 1,268 Posts Mentioned: 40 Post(s) Tagged: 3 Thread(s)	try tightning the lower bolt more (way bast the recomended torque spec) on cars with similar lower attachment points that's usually the issue with aftermarket pieces. __________________ don't you think if I was wrong, I'd know it?

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03-09-2013, 01:12 PM	#4
stancypants Senior Member Join Date: Dec 2012 Drives: FR-s Location: Atlanta, GA Posts: 184 Thanks: 287 Thanked 108 Times in 48 Posts Mentioned: 6 Post(s) Tagged: 0 Thread(s)	i mean mine make a lil noise but its aftermarket parts its not going to feel like or sound like stock so it doesnt bother me but thats just me

03-09-2013, 01:31 PM	#5
just86 Senior Member Join Date: Feb 2012 Drives: 2013 genesis rspec Location: IL Posts: 538 Thanks: 35 Thanked 151 Times in 83 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	BC are low rating coilovers, you get what you pay for

03-09-2013, 01:39 PM	#6
zex Senior Member Join Date: Apr 2012 Drives: Subaru WRB BRZ Limited Location: Richmond Hill, Ontario, Canada Posts: 471 Thanks: 282 Thanked 65 Times in 52 Posts Mentioned: 9 Post(s) Tagged: 0 Thread(s)	Mine makes a squeaky spring noise when it rains really hard

03-09-2013, 07:28 PM	#8
jammz Member Join Date: Dec 2012 Drives: '13 Scion FR-S Agento Location: New York Posts: 62 Thanks: 27 Thanked 30 Times in 14 Posts Mentioned: 9 Post(s) Tagged: 0 Thread(s)	i had BC coilovers on my old car and my friend (who had an Infiniti G37x, G37s and now BMW 328i which he had BC racing on all of them) and I had slight knocking noises aswell. So i'd say its "normal"

03-14-2013, 10:03 AM	#13
speed6sam Member Join Date: Aug 2012 Drives: SWP BRZ Limited 6 Spd Location: Orlando Posts: 65 Thanks: 31 Thanked 19 Times in 13 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	I have one of the first production kits on my car. Zero noises under any conditions and my car is autocrossed/driven hard as much as possible. You guys with slight noises need to isolate where its coming from and contact BC about it so they can help you figure it out.

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