Possible coil bind? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Sniepster · 05-18-2021, 08:49 AM

So i've jacked the car up today to diagnose a strange metallic sound i hear from time to time (it sometime sounded like the exhaust was banging about), we were not able to find anything however we did notice something strange on the rear springs, it looks like the bottom coils have come together as they also have marks in them, is this what coil bind looks like? The car has Eibach lowering springs on stock shocks. If it is coil bind does this mean the springs can break under hard cornering? What can I do to fix this?

Picture attached.

BigTuna · 05-18-2021, 09:22 AM

Normal, and It's what they are designed to do. Eibachs are progressive, so they get stiffer as they compress. They do this using the pitch between coils and reducing active coil count when they compress. That isolator sleeve on the spring protects the coils from rubbing through the next coil's paint.

The sound you're hearing could just be it shifting on it's perch as it's loaded/unloaded.

Sniepster · 05-19-2021, 04:25 AM

I did not touch the coils to get a feel for them, but the two different looking coils are covered in some kind of rubber and they're supposed to touch, am i understanding this correctly?

x808drifter · 05-19-2021, 04:17 PM

Yes

05-18-2021, 08:49 AM	#1
Sniepster Member Join Date: Nov 2020 Drives: 2013 Toyota 86 Location: Bucharest, Romania Posts: 62 Thanks: 8 Thanked 17 Times in 13 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Possible coil bind? So i've jacked the car up today to diagnose a strange metallic sound i hear from time to time (it sometime sounded like the exhaust was banging about), we were not able to find anything however we did notice something strange on the rear springs, it looks like the bottom coils have come together as they also have marks in them, is this what coil bind looks like? The car has Eibach lowering springs on stock shocks. If it is coil bind does this mean the springs can break under hard cornering? What can I do to fix this? Picture attached. Attached Images

05-18-2021, 09:22 AM	#2
BigTuna Senior Member Join Date: Jun 2015 Drives: 2013 WRB BRZ Location: Ohio Posts: 672 Thanks: 258 Thanked 477 Times in 275 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	Normal, and It's what they are designed to do. Eibachs are progressive, so they get stiffer as they compress. They do this using the pitch between coils and reducing active coil count when they compress. That isolator sleeve on the spring protects the coils from rubbing through the next coil's paint. The sound you're hearing could just be it shifting on it's perch as it's loaded/unloaded. __________________ 2013 WRB "Build" Thread

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05-19-2021, 04:25 AM	#3
Sniepster Member Join Date: Nov 2020 Drives: 2013 Toyota 86 Location: Bucharest, Romania Posts: 62 Thanks: 8 Thanked 17 Times in 13 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	I did not touch the coils to get a feel for them, but the two different looking coils are covered in some kind of rubber and they're supposed to touch, am i understanding this correctly?

05-19-2021, 04:17 PM	#4
x808drifter LMGTFY Join Date: Mar 2016 Drives: 13 FRS, 91 Miata Location: Lava Town, HI Posts: 2,776 Thanks: 5,561 Thanked 3,650 Times in 1,625 Posts Mentioned: 15 Post(s) Tagged: 0 Thread(s)	Yes

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