Steering wheel vibration 70-80 mph help?!

SouthArk370Z

Rotors seldom warp. If you still have some vibration on braking after balancing, you more than likely have some deposits on the rotor. Going through the bedding procedure will probably fix it.

__________________
Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub
Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

AstatenateZ

The whole 3-4 , 45-10mph brakes , then 5-10 , 60-15mph in succession stops?

SouthArk370Z

That's probably overkill, but, yeah. The few times I've needed to do it, 3 or 4 60ish-10 runs fixed the problem. Let brakes cool before coming to a full stop.

__________________
Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub
Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

AstatenateZ

Okay got it 60-10mph 3-4 times and. Then drive it for 15 mins and let them cool. Got it. When I get off I have an industrial road by my work I can do 3-4 60-10 brakes and then get on the interstate to my house 10-15 mins drive at about 65-70mph so should be plenty of time for it to cool down and i won’t be on my brakes. This just burns off the built up deposits correct? Then why couldn’t I use a brake cleaner? Doesn’t properly clean off the burnt on deposits or what? Sorry never really had issues with brakes before and I have the sport package.

SouthArk370Z

Yes

Brake cleaner is for removing oil and grease, not baked on deposits.

I've heard of people using sandpaper to get rid of the glaze but padding is easier (and more fun).

__________________
Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub
Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

AstatenateZ

That was something else I thought of! Only thing I was thinking... was if it was hub rings it would do it with or without the HC spacers. And I don't remember my car juddering a month ago when I installed spacers or before. Just within the last couple weeks. Seeing as how the spacers are hub centric 66.1 just like the OEM Nissan hub (bore). But for like $10 a set, it wouldn’t hurt to try. Most I can rule out right now is wheels are balanced issue, struts / coil overs check out fine and alignment is good since it was done maybe a month ago and I've not hit any big bumps or done anything to knock it out of whack. I did brake bedding process and will report back tomorrow to see if braking judder has gone away, got better / worse ! Then I’ll pull spacers off front , see if that helps. Maybe try the hub rings see if it works. And if all that doesn’t work I’m gonna get new rotors in a few months and go over braking system, stuck pads, kinked brake lines something. That's about all I know of honestly...

I agree! I’ve never had warped rotors. Not even on my sport bikes. And that thing I got way faster on and slowed down a lot faster too. So The Z should be good but idk. I’m not gonna rule out warped rotors just yet. I did do the 60-10 , 5 Times though! Read my below post to @SouthArk!


Gotcha! Well okay I did about 5 , 60-10mph brakes on the last one they started to skip while stopping, like ABS was about to kick in so I stopped, got on interstate and drove home 10 or so mins. I had to touch my brakes lightly a couple times but NEVER completely stopped and let the pads sit on rotor. Even when I got home I coasted in driveway and pulled e-brake. I put my hand to rotor on the cooling fin area and it was warm but cool enough to touch so I’m assuming it got it’s good 60-10mph brakes in and properly cooled. So we shall see tomorrow if judder while braking has stopped, got better / worse, etc. Vibration from 65-80 are still there after bedding though just for the record.

Rusty

Get your front rotors cut. Rotors do warp. Put a dial indicator on them and watch the runout. You already tried to bed the pads and that didn't work.

The vibrations that you are feeling that come and go is from the road surface. Different type of surfaces will produce different vibrations. Mine on grooved concrete is terrible. Smooth concrete is better. Fresh blacktop is great.

__________________

浪人 - 殺し屋
"The Difficult Anytime, The Impossible By Appointment Only"
http://www.the370z.com/members-370z-...o-journal.html

SouthArk370Z

Maybe it isn't rotor deposits. It's a common cause of vibration but not the only one. If you still think a rotor may be warped, check run-out, as per Rusty.

__________________
Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub
Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma