Steering wobble after Q45 brake upgrade! - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Viet-Tam · 03-10-2010, 05:13 PM

I just did the q45 brake upgrade. Now my steering wheel wobbles, it did not have this problem before the upgrade. I have new rotors and pads what could be causing this?

NINJASPY · 03-10-2010, 05:17 PM

what did you change, thats your problem.

Viet-Tam · 03-10-2010, 05:27 PM

I installed q45 brake calipers, pads, brake lines, and rotors.

yarou · 03-10-2010, 05:30 PM

We have no idea what you did wrong. Have you even considered to take it apart to check if everything is tight? (the suspension in general)

SoguRacing · 03-10-2010, 05:31 PM

check to make sure that the rotor is sitting flush against the hub. chances are that it's not. sand down the hub before you reinstall.

ADiamond240sx · 03-10-2010, 05:32 PM

Did you put all the lug nuts back on?

Tom25666 · 03-10-2010, 06:02 PM

the steering wheel wobbles when you hit the brakes or all the time?

DrifterE · 03-10-2010, 06:18 PM

Did you get your rotors drilled to 4 lug or you have a 5 lug hub?

Shadowhunter · 03-10-2010, 06:51 PM

Quote:

Originally Posted by Tom25666

the steering wheel wobbles when you hit the brakes or all the time?

That's a good question for starters.

mmdb · 03-10-2010, 07:35 PM

Retighten parts. Did you bead in the rotors correctly? Possibly warpage doesn't sound feasible since they're brand new.

Could be your wheel needs balancing. Try swapping front wheels.

S13NismoStyle · 03-11-2010, 11:32 AM

+1 on making sure the rotors are sitting flush against the hub. I had this EXACT same problem. I had a metal burr on the inside of the rotor that was keeping the rotor from sitting flush.

Also, if you drill the rotors yourself for 4lug, I would suggest chamfering the inside and outside of the new holes you made. I just put the rotor in a vice and went to town with a round bastard file. This will help keep the new holes from binding against the studs when you put it on.

dato · 03-12-2010, 02:51 AM

It's a rotor problem... Ok. So u got new rotors or resurfaced?? If resurfaced they were not done right.. Warp rotor or they just didn't cut enough material of from the rotors

***FaLKoN240*** · 03-12-2010, 08:10 PM

Tons of responses, nothing back from the OP.

zenkifem · 03-12-2010, 08:37 PM

how tight are you lug nuts / rotors to the hub?

also your rotors could be warped causing the wobble.

***FaLKoN240*** · 03-13-2010, 07:26 AM

Quote:

Originally Posted by zenkifem

how tight are you lug nuts / rotors to the hub?

also your rotors could be warped causing the wobble.

I'm pretty sure new rotors aren't supposed to be warped.

MavericStephenc · 03-13-2010, 08:04 AM

Quote:

Originally Posted by FaLKoN240

I'm pretty sure new rotors aren't supposed to be warped.

They aren't. however if stored incorrectly the can deform. The boxes are labeled "lay flat" for a reason.

just like stated in above posts check wheel balance, re tighten, and inspect.

for good measure look at the other suspension pieces. what are the condition of your tie rods?

zenkifem · 03-13-2010, 12:17 PM

Most people who do q45 swap put on used junkyard parts, it's just a speculation Since there's a few things that can cause wobbles/shaking

rocksteady_racer · 03-13-2010, 02:33 PM

Ok well I'll just throw this out there. My 300zx brake swap in my 91 was pulling hard right everytime I braked. The reason was bad tension rod bushings so nothing was being held in place so it was yanking the wheel hard to the right. So maybe your bushings on your suspension setup are bad? Then again 300z brakes grip pretty hard.

***FaLKoN240*** · 03-13-2010, 03:03 PM

Quote:

Originally Posted by zenkifem

Most people who do q45 swap put on used junkyard parts, it's just a speculation Since there's a few things that can cause wobbles/shaking

He said he bought new everything...

zenkifem · 03-13-2010, 03:09 PM

Thanks for stating the obvious BRO, sort of realized that after posting the first time...

Im just saying so when people search it up and try to troubleshoot, they can count things off....

03-10-2010, 05:13 PM	#1
Viet-Tam Leaky Injector Join Date: Jul 2007 Location: Corinth,MS Age: 47 Posts: 88 Trader Rating: (2) Feedback Score: 2 reviews	Steering wobble after Q45 brake upgrade! I just did the q45 brake upgrade. Now my steering wheel wobbles, it did not have this problem before the upgrade. I have new rotors and pads what could be causing this?

03-10-2010, 05:30 PM	#4
yarou Zilvia Addict Join Date: Sep 2006 Location: Bay Area, CA Posts: 661 Trader Rating: (8) Feedback Score: 8 reviews	We have no idea what you did wrong. Have you even considered to take it apart to check if everything is tight? (the suspension in general) __________________ jumbosandbox.blogspot.com

03-10-2010, 05:31 PM	#5
SoguRacing Post Whore! Join Date: Nov 2007 Location: (714) Age: 39 Posts: 2,967 Trader Rating: (23) Rides Gallery: SoguRacing Feedback Score: 23 reviews	check to make sure that the rotor is sitting flush against the hub. chances are that it's not. sand down the hub before you reinstall. __________________ Pre Tune Checkup! Compression,LeakDown,Vacuum Test $80. Cams Install: $180

03-10-2010, 05:32 PM	#6
ADiamond240sx Join Date: Aug 2006 Location: Houston Age: 49 Posts: 40 Trader Rating: (0) Feedback Score: 0 reviews	Did you put all the lug nuts back on? __________________ Rebuilding it one bolt at a time. Got any spare bolts?

03-10-2010, 06:18 PM	#8
DrifterE Leaky Injector Join Date: Jul 2004 Location: Los Angeles Age: 38 Posts: 63 Trader Rating: (0) Feedback Score: 0 reviews	Did you get your rotors drilled to 4 lug or you have a 5 lug hub? __________________ Where is my sig pic?...

03-10-2010, 05:17 PM	#2
NINJASPY Zilvia FREAK! Join Date: Oct 2007 Location: So-cal Los Angeles 626 Age: 44 Posts: 1,009 Trader Rating: (13) Feedback Score: 13 reviews	what did you change, thats your problem.

03-10-2010, 05:27 PM	#3
Viet-Tam Leaky Injector Join Date: Jul 2007 Location: Corinth,MS Age: 47 Posts: 88 Trader Rating: (2) Feedback Score: 2 reviews	I installed q45 brake calipers, pads, brake lines, and rotors.

03-10-2010, 07:35 PM	#10
mmdb Zilvia FREAK! Join Date: Apr 2003 Location: 240sx Posts: 1,558 Trader Rating: (20) Feedback Score: 20 reviews	Retighten parts. Did you bead in the rotors correctly? Possibly warpage doesn't sound feasible since they're brand new. Could be your wheel needs balancing. Try swapping front wheels. __________________ .25 till 3

03-11-2010, 11:32 AM	#11
S13NismoStyle Zilvia Member Join Date: Sep 2005 Location: greenville, sc Posts: 186 Trader Rating: (7) Feedback Score: 7 reviews	+1 on making sure the rotors are sitting flush against the hub. I had this EXACT same problem. I had a metal burr on the inside of the rotor that was keeping the rotor from sitting flush. Also, if you drill the rotors yourself for 4lug, I would suggest chamfering the inside and outside of the new holes you made. I just put the rotor in a vice and went to town with a round bastard file. This will help keep the new holes from binding against the studs when you put it on. __________________

03-12-2010, 02:51 AM	#12
dato Zilvia Junkie Join Date: Jun 2009 Location: california Age: 38 Posts: 434 Trader Rating: (6) Feedback Score: 6 reviews	It's a rotor problem... Ok. So u got new rotors or resurfaced?? If resurfaced they were not done right.. Warp rotor or they just didn't cut enough material of from the rotors

03-12-2010, 08:10 PM	#13
*FaLKoN240* Super Moderator Join Date: Jun 2004 Location: SoCal Temecula Posts: 16,893 Trader Rating: (73) Feedback Score: 73 reviews	Tons of responses, nothing back from the OP. __________________ Best way to do business with me? Make your best offer FIRST.

03-12-2010, 08:37 PM	#14
zenkifem BANNED Join Date: Feb 2010 Location: The valley (91401), California Age: 38 Posts: 39 Trader Rating: (3) Feedback Score: 3 reviews	how tight are you lug nuts / rotors to the hub? also your rotors could be warped causing the wobble.

03-13-2010, 12:17 PM	#17
zenkifem BANNED Join Date: Feb 2010 Location: The valley (91401), California Age: 38 Posts: 39 Trader Rating: (3) Feedback Score: 3 reviews	Most people who do q45 swap put on used junkyard parts, it's just a speculation Since there's a few things that can cause wobbles/shaking

03-13-2010, 02:33 PM	#18
rocksteady_racer Zilvia Junkie Join Date: Oct 2005 Location: Phila Age: 39 Posts: 544 Trader Rating: (0) Feedback Score: 0 reviews	Ok well I'll just throw this out there. My 300zx brake swap in my 91 was pulling hard right everytime I braked. The reason was bad tension rod bushings so nothing was being held in place so it was yanking the wheel hard to the right. So maybe your bushings on your suspension setup are bad? Then again 300z brakes grip pretty hard.

03-13-2010, 03:09 PM	#20
zenkifem BANNED Join Date: Feb 2010 Location: The valley (91401), California Age: 38 Posts: 39 Trader Rating: (3) Feedback Score: 3 reviews	Thanks for stating the obvious BRO, sort of realized that after posting the first time... Im just saying so when people search it up and try to troubleshoot, they can count things off....

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