Steering wheel shakes - Braking at Hwy Speeds

Cafiax

I recently got H&R spacers installed. 20mm in the front and 25mm in the back. I just noticed that my steering wheel shakes when braking at highway speeds. I have a feeling its my brake rotors being warped or something to do with my brake pads. But i can't dismiss the fact that it happened shortly after the spacers installation. Could it just be coincidence? my steering wheel does not shake at all when going at high speeds so I feel like it shouldn't be the spacers. I have a 2010 7AT 370z. 14000kms roughly 8700 miles. I have never changed rotors or anything of that sort. Any ideas? Thanks guys

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2010-PW-370z Fast Intentions CBE 18" res + HFC, K&N Typhoons Intakes(Gen 3 Stillen soon), 20mm H&R Front - 25mm H&R Back, Shine Auto(Sunline)

gurneyeagle

If the vibration only occurs under braking, I'm guessing it's the rotors.

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Waiting on the Z35! SOLD - 2011 Gun Metallic Touring 7AT w Sports Pkg & Nav, Nismo Bumper and Rims, RC Grille, RC Brake Ducts, H&R Spacers, Painted Door Hdls, GTR Start Button, Nav By-Pass, EVO R Fog Light, CF Ducktail, CF Interior Trim

Trips

to insure it's not the spacers? remove them and see if it goes away

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Scott @ RA

99% sure that the problem you are describing is a little bit of a warped rotor problem... the spacers just might be helping magnifying the problem a little more.

MattP725

Agree... if they are direct mount it will only take you a few minutes to remove... better safe than sorry.

I just installed some 15/20 mm stud replacement ones and I get no vibration... only change was the steering being a bit more sensitive to road variations.

KingZee

this makes me very curious. I noticed vibration after installing H&R spacers as well, thought it might be the spacers but dismissed it to being brake build up or slightly warped rotors. I have a feeling spacers have something to do with this. I don't think mine are direct bolt-ons either and since the vibration isn't that bad and I don't have any vibration at high speed I'm living with it right now.

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Focus ST

Cafiax

Does it shake under normal driving conditions? If so it's probably spacers o.o

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2010-PW-370z Fast Intentions CBE 18" res + HFC, K&N Typhoons Intakes(Gen 3 Stillen soon), 20mm H&R Front - 25mm H&R Back, Shine Auto(Sunline)

KingZee

only vibrates during braking and nothing else but it started immediately after the spacers install

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Focus ST

Cafiax

Guess we're on the same boat. I'm at the dealership right now waiting for the Z. Il let you know if they find the problem.

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2010-PW-370z Fast Intentions CBE 18" res + HFC, K&N Typhoons Intakes(Gen 3 Stillen soon), 20mm H&R Front - 25mm H&R Back, Shine Auto(Sunline)

Cmike2780

I would check to make sure the lugs are torqued correctly. It sounds a lot like the rotors, but I would stilll check to make sure there isn't any "play" at the wheels.

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[09][MB][6-Spd MT][Touring][Stillen Gen III][K&N][Borla CBE][Evo-R]

Cafiax

it was just the rotors being warped... as expected.. they just machined it for free and there's no more vibrations.

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2010-PW-370z Fast Intentions CBE 18" res + HFC, K&N Typhoons Intakes(Gen 3 Stillen soon), 20mm H&R Front - 25mm H&R Back, Shine Auto(Sunline)

KingZee

thanks for letting us know ...they didn't give you any crap for having spacers...?

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Focus ST

Cafiax

nop no mention at all. Everything was covered by warranty. Only problem was washing my car after i specifically said "please don't wash it, vacuum it... but don't wash" LOL. (hopefully no damage!)

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2010-PW-370z Fast Intentions CBE 18" res + HFC, K&N Typhoons Intakes(Gen 3 Stillen soon), 20mm H&R Front - 25mm H&R Back, Shine Auto(Sunline)

Thechidz

Warped rotors are covered under warranty? Im getting some shake braking at highway speeds

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I <3 my car

2ndChance

For those who still experience this problem...

I have Ichiba "v2" 20mm all around. From day 1 I've been having vibration issues when going 60mph+. Slight vibration from braking.

Re installed all 4 spacers with power tools and properly aligned/balanced in shop, no driving vibration this time but more noticeable vibration occurs when braking.

It seems like the problem alternates after each install, you either get driving vibration, or braking vibration.

Then I removed only front spacers just for testing, no vibration at all speeds, neither when braking.

I think I'll try another brand with zero reported vibration issues... this problem is driving me mad but I cannot drive my Z without them, it looks weird because I have a front lip.