Rotor Cracks Induced Braking Wobble

General information about the first-generation Nissan Maxima in the US. What was the Datsun 810 became the luxury leader Maxima in the US in 1981.

Moderators: plenzen, goglio704, glenlloyd, Nissan_Ranger

Post Reply
Carimbo
Posts: 459
Joined: 14 years ago

Rotor Cracks Induced Braking Wobble

#1

Post by Carimbo » 11 years ago

After several months of front-end shimmy or wobble under light to moderate (but not heavy) braking, I changed out the front rotors. Runout was not bad, and adjusting the hub bearing preload did hot help, but a secondary inspection revealed what appeared to be light pitting on the rotor surface, but mostly in straight lines, just barely enough to start to catch a fingernail.

Since the new rotors solved the problem, I attribute the pitting to actual cracks in the rotors. Anyone ever seen this before?
I normally don't overheat the brakes, don't overload the car, and don't stand on the pedal at a stop after hard braking.

Photos:
Image
Image
Image
Image
Image

rlaggren
Posts: 541
Joined: 13 years ago
Location: San Francisco

#2

Post by rlaggren » 11 years ago

Never seen it. But the general surface in the last pic doesn't look very good itself. Are they in spec for thickness?

Rufus
82 Maxima wagon

diesel-man
Posts: 150
Joined: 14 years ago
Location: Elkton, MD

#3

Post by diesel-man » 11 years ago

The rotors are not cracked. The line you see is where it had rusted after setting for a few rainy days or a week. If you notice in the last picture there is the outline of a brake pad a little over from the line (to the left). The pads have a 1/8" cut from top to bottom. Maxi brake rotors are not that thick (compared to some other cars) and can warp fairly easily (to my experience). If someone else drives the car it may have happened that one time? There is also the possibility that in stop and go traffic in the city? or on a long downgrade? Have the rotors cut, and I believe you will be ok after that. (sometimes rotors can warp a little after getting hot initially, a bit like a piece of wood can warp after it is cut from a tree).

Carimbo
Posts: 459
Joined: 14 years ago

#4

Post by Carimbo » 11 years ago

Surface WAS rough, would have been borderline or failed spec after cutting, so I simply replaced them.

I agree the brake rotors and suspension components are on the "light" side, but I also enjoy that the lightness makes the car feel more nimble compared to others of its size.

Carimbo
Posts: 459
Joined: 14 years ago

#5

Post by Carimbo » 11 years ago

Adding a link to a page w/ much useful info on this subject (and related):

http://www.stoptech.com/tech_info/wp_wa ... disk.shtml#

Post Reply

Who is online

Users browsing this forum: No registered users and 1 guest