KW1 Coilovers / Rear Creak Noise

shawnberry45 · 11-26-2020, 07:41 PM

I’ve had my KW1’s for about a year, less thank 5000 miles driven.

There is a creak noise coming from rear only, from inside the car it sounds line upper part of the coilovers...

Smooth roads no noise only bumps and is very irritating
Call has Z1 control arms and camber arms.... all are greased. Differential busing replaced with poly. Z1 Collars are installed too.

Thought it was rear sway bar.... put in stock with stock bushing.... same noise

What am I missing? Car rides completely smooth no issues with handing.

Rusty · 11-26-2020, 08:27 PM

You have true coilovers in the rear?

Sounds like the spring is binding on the spring seats.

shawnberry45 · 11-26-2020, 09:04 PM

Quote:

Originally Posted by Rusty

You have true coilovers in the rear?

Sounds like the spring is binding on the spring seats.

These are the KW1’s and reuse the stock spring perches / Mid links

shawnberry45 · 11-26-2020, 09:54 PM

Do you guys think Swift Thrust Washers would help? If so what size do you suggest?

Rusty · 11-26-2020, 10:01 PM

Quote:

Originally Posted by shawnberry45

Do you guys think Swift Thrust Washers would help? If so what size do you suggest?

If you are reusing the stock rubber isolators on the rear springs. The thrust washers won't work.

OptionZero · 11-27-2020, 12:14 AM

Creaking is usually metal on metal

Looking at the pic in Z1’s listing:
https://www.z1motorsports.com/suspen...QaAiNBEALw_wcB

Looks like it has an aluminum upper perch for the rear spring; because they are progressive instead of linear the diameter is different. Never seen thrust washers on a progressive spring but offhand I can’t think why it won’t work

I suggest calling SPL parts. They sell kw and swift and can figure it out

justin_boy · 11-28-2020, 02:40 PM

my v3's squeak like crazy...also had st coilovers (kw sister brand) on my other car and they squeaked like crazy too

shawnberry45 · 11-28-2020, 06:06 PM

Quote:

Originally Posted by justin_boy

my v3's squeak like crazy...also had st coilovers (kw sister brand) on my other car and they squeaked like crazy too

Hmmm.... any kind of solution? I’ve read Silicone spray may help?
It’s pretty irritating, I can litterly press down my my trunk so the back goes up and down and you hear the squeaking LOL

OptionZero · 11-28-2020, 07:53 PM

call SPL about the thrust washers

shawnberry45 · 11-30-2020, 09:45 PM

Quote:

Originally Posted by OptionZero

call SPL about the thrust washers

Thrush washers not an option for these, SPL Parts said to check the top mounts
Heading to mechanic Thursday to take a peek

OptionZero · 11-30-2020, 10:09 PM

IIRC all KW's use rubber mounts, so maybe they need greasing or somethin

justin_boy · 12-03-2020, 03:56 PM

Quote:

Originally Posted by OptionZero

IIRC all KW's use rubber mounts, so maybe they need greasing or somethin

thats what i did with my st coilovers and it fixed it for a while, pretty sure thats exactly it

shawnberry45 · 12-04-2020, 03:56 PM

Quote:

Originally Posted by justin_boy

thats what i did with my st coilovers and it fixed it for a while, pretty sure thats exactly it

Looks like both rear shock mounts have a ton of play, so we are changing them out now. Per the mechanic the rubber is worn out. Swapping them out for some KYB Rear mounts....will circle back if that's the fix!

shawnberry45 · 12-09-2020, 12:39 PM

Quote:

Originally Posted by shawnberry45

Looks like both rear shock mounts have a ton of play, so we are changing them out now. Per the mechanic the rubber is worn out. Swapping them out for some KYB Rear mounts....will circle back if that's the fix!

Quiet as can be now.... The bearing on both rear shock mounts were bad and making noise. I had replaced with Moog when we did the coilovers....less than 5k miles and they failed. Hoping these KYB mounts last longer! Happy this is fixed

11-26-2020, 07:41 PM	#1 (permalink)
shawnberry45 Base Member Join Date: Jul 2012 Location: Chicago, IL Posts: 65 Drives: G37 Rep Power: 13	KW1 Coilovers / Rear Creak Noise I’ve had my KW1’s for about a year, less thank 5000 miles driven. There is a creak noise coming from rear only, from inside the car it sounds line upper part of the coilovers... Smooth roads no noise only bumps and is very irritating Call has Z1 control arms and camber arms.... all are greased. Differential busing replaced with poly. Z1 Collars are installed too. Thought it was rear sway bar.... put in stock with stock bushing.... same noise What am I missing? Car rides completely smooth no issues with handing.

11-26-2020, 08:27 PM	#2 (permalink)
Rusty Ronin Samurai - Assassin Join Date: Dec 2011 Location: Fayettenam,Pennsyltucky Age: 68 Posts: 35,218 Drives: 2011 Nismo GM 6M Rep Power: 2684438	You have true coilovers in the rear? Sounds like the spring is binding on the spring seats. __________________ 浪人 - 殺し屋 "The Difficult Anytime, The Impossible By Appointment Only" http://www.the370z.com/members-370z-...o-journal.html

11-27-2020, 12:14 AM	#6 (permalink)
OptionZero A True Z Fanatic Join Date: Apr 2011 Location: Sacramento Posts: 3,235 Drives: 15 370Z Nismo 6MT Rep Power: 214100	Creaking is usually metal on metal Looking at the pic in Z1’s listing: https://www.z1motorsports.com/suspen...QaAiNBEALw_wcB Looks like it has an aluminum upper perch for the rear spring; because they are progressive instead of linear the diameter is different. Never seen thrust washers on a progressive spring but offhand I can’t think why it won’t work I suggest calling SPL parts. They sell kw and swift and can figure it out JARblue and sx moneypit like this. __________________ OptionZero Build Thread

11-28-2020, 07:53 PM	#9 (permalink)
OptionZero A True Z Fanatic Join Date: Apr 2011 Location: Sacramento Posts: 3,235 Drives: 15 370Z Nismo 6MT Rep Power: 214100	call SPL about the thrust washers Spooler likes this. __________________ OptionZero Build Thread

11-30-2020, 10:09 PM	#11 (permalink)
OptionZero A True Z Fanatic Join Date: Apr 2011 Location: Sacramento Posts: 3,235 Drives: 15 370Z Nismo 6MT Rep Power: 214100	IIRC all KW's use rubber mounts, so maybe they need greasing or somethin __________________ OptionZero Build Thread

11-26-2020, 09:54 PM	#4 (permalink)
shawnberry45 Base Member Join Date: Jul 2012 Location: Chicago, IL Posts: 65 Drives: G37 Rep Power: 13	Do you guys think Swift Thrust Washers would help? If so what size do you suggest?

11-28-2020, 02:40 PM	#7 (permalink)
justin_boy Track Member Join Date: May 2015 Location: woodland hills Posts: 600 Drives: z34 Rep Power: 8367	my v3's squeak like crazy...also had st coilovers (kw sister brand) on my other car and they squeaked like crazy too

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