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Old 09-08-2003, 04:12 PM   #1
firedust
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Default Resurfacing rotors...and other questions..

I went on a mountain run a few weeks ago and in my 20 minutes going around some twisties my brakes were begging for me to stop. So i did.

I then found I have a shimmy at 70-40 mph braking. Im taking it in for service and they said they may have to resurface the rotor.

Subaru should use better rotors than this right? If they tell me they will resurface under warranty, should I demand a new one? Effectively they are cutting into my life of the rotor, thereby making me have to pay for a new one earlier than otherwise. What do you think?

I have 4100 miles on my car. I just got it on august 1st.
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Old 09-08-2003, 05:18 PM   #2
VSG
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with low miles like that I would try for the new rotors. But at the same time since you have low miles Turning the rotors shouldn't kill too much life out of it.

(but I'm no expert on this)
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Old 09-08-2003, 10:16 PM   #3
Stanley
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Sounds to me like you got your rotors too hot. In your circumstances, I'd be happy if they turned them for no charge under warranty. I could be very wrong, they could take a look at the rotors and determine there was a manufacturing defect. However, given the conditions in which the problem showed up, it sounds like you got them too hot and left some pad material on the rotors.
I cooked the rotors in the mountains driving a Honda Civic with ~2K miles on the clock and they were not covered under warranty.

This is an interesting and worthwhile read.

FWIW, I have just under 36K on my car and the original pads/rotors are still in good shape with plenty of pad left and no shimmy. Many of the miles are from mountain passes: mulitiple trips to the Sierras for snowboarding, 3 trips to Yosemite, and lots of local "hills" in the Santa Cruz Mountains. On one of my trips down the pass from Yosemite I saw the brakes on a Ford Expedition get remarkably hot, in fact I'm pretty sure they were on fire - there was a ton of smoke pouring from all four wheels!
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Old 09-09-2003, 11:35 AM   #4
MrHorspwer
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Quote:
Sounds to me like you got your rotors too hot. In your circumstances, I'd be happy if they turned them for no charge under warranty
100% agreed

There is a difference between use and abuse. You basically said it yourself... spirited mountain driving.

Obviously, the brakes on your WRX aren't suitable for your driving style. This is not a manufacturing defect or a problem with your rotors, it has to do 100% with your driving conditions. Why ask for new rotors when you will probibly warp those next time you're in the mountains too? The real solution would be to find yourself a brake setup more suited to your use of the brakes.
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Old 09-09-2003, 01:34 PM   #5
Stanley
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Quote:
Originally posted by MrHorspwer
This is not a manufacturing defect or a problem with your rotors, it has to do 100% with your driving conditions.
While it is extremely likely that the shuddering brakes were caused by the driver pushing the brakes beyond their limits, it is *possible* that there is a manufacturing defect. There is no way to tell over the internet.

Firedust, on a positive note, you might want to consider taking this oppurtunity to upgrade your rotors and/or pads. If the dealer does not cover any work under warranty, it is not terribly difficult to work on disc brakes.
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Old 09-09-2003, 01:49 PM   #6
firedust
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Some of you have some pent up agression..lashing out at me and lecturing me online isnt going to help much.


This vibration was noticed after some mountain driving however the tech seemed to think that the car may have sat before being sold for a while and this caused pad deposits and thereby leading to uneven wear. What happened while driving spiritedly is the wear part, until then it wasnt noticeable.

The service writer seemed to lean this way as well and i got all 4 rotors resurfaced. IF it happens again im going to go to slotted stoptechs most likely.
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Old 09-09-2003, 02:54 PM   #7
scotty305
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Here's something that hasn't been mentioned in this thread: one of the worst things you can do for your brakes is come to a hard stop, and then sit there with the brakes on. This heats up the entire rotor, but only lets part of it cool down.

When you're waiting at a stop light, try not to use the brakes, if at all possible. Clamping on the brakes at a stop will cause them to wear unevenly.

Also another big cause of brake shudder is actually due to air in the lines, or fluid breakdown. Are you still using factory brake fluid? Replace with something with a better heat rating, WRX's are heavy and powerful, the heat generated by the brakes tends to boil your brake fluid sometimes.


good luck, and take care of your brakes, they're very important.

-scott-
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