Front Akebono Brakes Installed Still Shuddering When Braking

S

STIBungy

Member
Location
Denver, CO
Car
2007 FX35 AWD
Finished bleeding the calipers on my Akebono brakes up front. Took the car for a ride and the first hard braking to bed the pads, the steering wheel starts to shudder. The shuddering gets worse after doing this 4 or 5 times. Argh!

What is wrong with this car? I was hoping the bigger brakes would finally give me some smooth brake feel.

Could it be a bad bearing? Bad hub? Whole front knuckle may be bad?

I'm lost.
 
Does your steering shakes at all, a little? Have you try to rotate the wheels? Just a thought.
 
might be the centric rotors, same thing happened to me i got the cheap ctek centrics, after bedding it in i warped the rotors. The only way to fix this is to either machine the rotors or try to rebed the rotors on an open highway so you wont use your brakes as much and come to a complete stop.
 
Check the rotor face run out with a dial indicator (or have a shop do it). Per my Infiniti dealer the limit for the rotors is =Front Rotor Runout 0.035mm (0.0013 inch)

Rear Rotor Runout 0.055mm (.0021 inch)

If yours are above that limit you need to turn the rotors either on a lathe or on the vehicle. My son had the same problem on his FX50S after having a parts store turn his original OEM rotors and after installation on the car he had bad shake and vibration. A dial indicator check showed over 0.007 run out. He bought new oem rotors and they solved the problem.
Good luck.

---------- Post added at 08:02 AM ---------- Previous post was at 07:57 AM ----------

Sorry for the font color guys, it was a cut and paste from a e mail from my dealer!
Check the rotor face run out with a dial indicator (or have a shop do it). Per my Infiniti dealer the limit for the rotors is =
RCheck the rotor face run out with a dial indicator (or have a shop do it). Per my Infiniti dealer the limit for the rotors is =
Front Rotor Runout 0.035mm (0.0013 inch)

Rear Rotor Runout 0.055mm (.0021 inch)

If yours are above that limit you need to turn the rotors either on a lathe or on the vehicle. My son had the same problem on his FX50S after having a parts store turn his original OEM rotors and after installation on the car he had bad shake and vibration. A dial indicator check showed over 0.007 run out. He bought new oem rotors and they solved the problem.
Good luck.ear Rotor Runout 0.055mm (.0021 inch)

If yours are above that limit you need to turn the rotors either on a lathe or on the vehicle. My son had the same problem on his FX50S after having a parts store turn his original OEM rotors and after installation on the car he had bad shake and vibration. A dial indicator check showed over 0.007 run out. He bought new oem rotors and they solved the problem.
Good luck.
 
Replaced both front bearings. Still same issue. New Stoptech rotors on the way.

I guess I should stop working on my car late at night. Last night, I put the dust shield on the driver's side in the wrong way. Had to take it all apart this morning to flip it around. LOL!
 
did you bleed the calipers properly? i think i read somewhere since its a 2 pot system, there'ss a bleeding procedure for each pot.
 
One other thing is to make sure all the surfaces are good and clean before reassembly. If there's something in between the rotor and the face then that could cause this as well.
 
I wiped down the face and ends with brake cleaner to get rid of the mfging oil it.

santiagodraco said:
One other thing is to make sure all the surfaces are good and clean before reassembly. If there's something in between the rotor and the face then that could cause this as well.
Click to expand...

Yep, bled inside and then outside with a vacuum bleeder. Same as my Brembos.

soonster said:
gravity bleed (fronts have 2 bleeders on each caliper) or machine bleed?
Click to expand...
 
I'm having a similar issue I'm trying to track down. No shake on the hwy, no shake w/ OEM brakes (original w/ 50K), but a few months after Akebono's, shake under hard braking. It doesn't shake if I'm gentle on the brakes in around town driving. But if I get on them hard, I will notice a shake. It's very specific, if I ease into the brakes and then step down hard, no shake. But if I just stomp on the pedal, it will kick back and then I feel the shake.

It does go away once things cool down so I'm leaning toward rotors. New pads, and new R1 rotors when I did the conversion. Maybe my bearings are shot and the brakes are just magnifying the problem. I'll look into that next.

Should have nothing to do with brake bleeding since that would be weak brakes or long pedal travel, not shake.
 
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I installed a new set of Stoptech slotted rotors this morning. Didnt bed the pads to them yet. Took the car out to a fairly long straight road that has hardly any traffic. Brought the speed up to about 30-35mph and held it steady while I slowly applied the brakes. It starts to shudder again. Release the brakes and the car is fine. Slowly apply the brakes with increasing pressure and it starts to shudder again. So now I'm really stumped.
 
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