Slight squeal...

ParkStr8 · 10-04-2013, 12:18 PM

Ok - just switched out my stock for Pole Position S-04s. Love the tires.

But now there is slight squeel when I lightly apply the brakes - can't quite determine which wheel yet.

On my FX - when the installers rotated the tires - the over tightened one wheel and it slightly bent the rotor. Infiniti replaced it under warranty - with little hassle. ALtho they did try to tell me it was the spacer.

My reponse was - the spacer is bolted to the hub, not the rotor! They were like - "uh, yeah, you're right."

Wondering if they did the same thing here. Altho I watched them hand tighten them to 80pds.

Thoughts anyone?

kenchan · 10-04-2013, 12:29 PM

is it tire squeal? if so, break the new tires in. make sure psi is 35 cold or a tad higher. i use 37-38psi on my S04's on my G. no squeal

80lbs/ft is correct.

if the squeal is coming from the brakes then it's possible your brakes are dirty. take it up to an open road, go 50mph and stomp on the brake hard enough to engage ABS down to about 10mph, do that a few times to clean the pad surface and keep driving for another 5min or so to cool them off.

Chuck33079 · 10-04-2013, 12:37 PM

Or, the backing plate is ever so slightly touching the rotor. If it is, it's easy enough to bend back out of the way.

SouthArk370Z · 10-04-2013, 12:39 PM

Since you only mention the problem when braking and not when turning, I'd say it's the brakes. Kenchan's procedure should fix the problem (just one good stop may do the trick). Chuck33079's backing plate theory is easy to check and gives you a good excuse to inspect the rest of the suspension while you're there.

Chuck33079 · 10-04-2013, 12:41 PM

Quote:

Originally Posted by SouthArk370Z

Since you only mention the problem when braking and not when turning, I'd say it's the brakes. Kenchan's procedure should fix the problem (just one good stop may do the trick). Chuck33079's backing plate theory is easy to check and gives you a good excuse to inspect the rest of the suspension while you're there.

It happened on my buddy's G37. He thought something was broken. Took five minutes to fix.

kenchan · 10-04-2013, 12:48 PM

Quote:

Originally Posted by Chuck33079

Or, the backing plate is ever so slightly touching the rotor. If it is, it's easy enough to bend back out of the way.

true, ive had this happen on one of my cars after dealer did some brake service long time ago.

i just pushed the metal back a little and no more squeal.

Chuck33079 · 10-04-2013, 12:50 PM

Quote:

Originally Posted by kenchan

true, ive had this happen on one of my cars after dealer did some brake service long time ago.

i just pushed the metal back a little and no more squeal.

If you smack the backing plate with the wheel when you take the wheel off, it'll bend.

kenchan · 10-04-2013, 12:53 PM

yep, makes sense.

SouthArk370Z · 10-04-2013, 12:56 PM

Even if it is the plate, it's still a good idea fun to check the ABS every now and then.

Chuck33079 · 10-04-2013, 12:57 PM

Quote:

Originally Posted by SouthArk370Z

Even if it is the plate, it's still a good idea fun to check the ABS every now and then.

Bonus points if you wait until your GF in the passenger seat dozes off and you scream as you nail the brakes.

ParkStr8 · 10-04-2013, 02:18 PM

I forgot about the backing plate...had this on my G37S coupe after spacers and wheel upgrade.

It only happens when applying the breaks...so it could be dirty or just the plate.

Thanks!

-s-

kenchan · 10-04-2013, 02:56 PM

yah, try stomping on it per my above post. if that doesn't take care of it, would remove the pads and apply some brakequiet on the back of the pads and re-install.

Amazon.com: CRC Disc Brake Quiet 05016, 4 Fl Oz: Automotive

ParkStr8 · 10-04-2013, 04:18 PM

Got it. Thanks.

Oh - and don't know how I started this in this section...should be in Wheels/Brakes...

oops.

10-04-2013, 12:18 PM	#1 (permalink)
ParkStr8 Enthusiast Member Join Date: Mar 2009 Location: Dallas, Tx Posts: 361 Drives: 2015 370z Sport Tech Rep Power: 16	Slight squeal... Ok - just switched out my stock for Pole Position S-04s. Love the tires. But now there is slight squeel when I lightly apply the brakes - can't quite determine which wheel yet. On my FX - when the installers rotated the tires - the over tightened one wheel and it slightly bent the rotor. Infiniti replaced it under warranty - with little hassle. ALtho they did try to tell me it was the spacer. My reponse was - the spacer is bolted to the hub, not the rotor! They were like - "uh, yeah, you're right." Wondering if they did the same thing here. Altho I watched them hand tighten them to 80pds. Thoughts anyone?

10-04-2013, 12:29 PM	#2 (permalink)
kenchan A True Z Fanatic Join Date: Aug 2009 Location: N/A Posts: 76,801 Drives: N/A Rep Power: 141521	is it tire squeal? if so, break the new tires in. make sure psi is 35 cold or a tad higher. i use 37-38psi on my S04's on my G. no squeal 80lbs/ft is correct. if the squeal is coming from the brakes then it's possible your brakes are dirty. take it up to an open road, go 50mph and stomp on the brake hard enough to engage ABS down to about 10mph, do that a few times to clean the pad surface and keep driving for another 5min or so to cool them off. SouthArk370Z likes this.

10-04-2013, 12:37 PM	#3 (permalink)
Chuck33079 A True Z Fanatic Join Date: Nov 2011 Location: Houston Posts: 12,265 Drives: 2011 370ztt Rep Power: 29539	Or, the backing plate is ever so slightly touching the rotor. If it is, it's easy enough to bend back out of the way. kenchan likes this. __________________ 2011 MB Touring-Sport-6sp-Nav/GTM TT/FI TT TDX/JTran/Kosmic/Eibach/Hotchkis/SPC/CSF/RPS/SoThatsWhereAllMyMoneyWent

10-04-2013, 12:39 PM	#4 (permalink)
SouthArk370Z Premium Member Join Date: Nov 2010 Location: South Arkansas Posts: 8,435 Drives: 2014 Challenger Rep Power: 324198	Since you only mention the problem when braking and not when turning, I'd say it's the brakes. Kenchan's procedure should fix the problem (just one good stop may do the trick). Chuck33079's backing plate theory is easy to check and gives you a good excuse to inspect the rest of the suspension while you're there. __________________ Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

10-04-2013, 12:56 PM	#9 (permalink)
SouthArk370Z Premium Member Join Date: Nov 2010 Location: South Arkansas Posts: 8,435 Drives: 2014 Challenger Rep Power: 324198	Even if it is the plate, it's still a good idea fun to check the ABS every now and then. __________________ Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

10-04-2013, 12:53 PM	#8 (permalink)
kenchan A True Z Fanatic Join Date: Aug 2009 Location: N/A Posts: 76,801 Drives: N/A Rep Power: 141521	yep, makes sense.

10-04-2013, 02:18 PM	#11 (permalink)
ParkStr8 Enthusiast Member Join Date: Mar 2009 Location: Dallas, Tx Posts: 361 Drives: 2015 370z Sport Tech Rep Power: 16	I forgot about the backing plate...had this on my G37S coupe after spacers and wheel upgrade. It only happens when applying the breaks...so it could be dirty or just the plate. Thanks! -s-

10-04-2013, 02:56 PM	#12 (permalink)
kenchan A True Z Fanatic Join Date: Aug 2009 Location: N/A Posts: 76,801 Drives: N/A Rep Power: 141521	yah, try stomping on it per my above post. if that doesn't take care of it, would remove the pads and apply some brakequiet on the back of the pads and re-install. Amazon.com: CRC Disc Brake Quiet 05016, 4 Fl Oz: Automotive

10-04-2013, 04:18 PM	#13 (permalink)
ParkStr8 Enthusiast Member Join Date: Mar 2009 Location: Dallas, Tx Posts: 361 Drives: 2015 370z Sport Tech Rep Power: 16	Got it. Thanks. Oh - and don't know how I started this in this section...should be in Wheels/Brakes... oops.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
2013 370z, 6000 miles and already with light squeal?!?!	zilverbullet	Brakes & Suspension	5	06-05-2013 04:28 PM
Strange 6 speed transmission squeal	Mandingo	Engine & Drivetrain	9	12-16-2011 11:07 AM
slight clatter	roy'sz	Engine & Drivetrain	0	10-08-2011 03:38 PM
Sport pkg brake squeal	gh0st3794	Brakes & Suspension	10	01-24-2011 06:17 PM
Tires spin without squeal when broken loose	spearfish25	Wheels & Tires	15	04-17-2009 10:39 PM