Brake Rotors - Rookie mistake?
#1
06-02-2007 | 11:12 AM
Thread Starter
|
Member
Joined: May 2007
Posts: 135
From:
Brake Rotors - Rookie mistake?
I'ma novice car guy. Replaced front brake rotors and pad a couple weeks ago. Still had a slight shutter when braking. The general consensus on the board here was the rotors were warped from the factory.
Fortunately I had to get my car it's yearly inspection (live in PA). The rotors were "glazed", which I'm assuming was the finish from the factory. I'm also assuming that I was supposed to take that glaze off with sandpaper before putting the rotors on?
Fortunately I had to get my car it's yearly inspection (live in PA). The rotors were "glazed", which I'm assuming was the finish from the factory. I'm also assuming that I was supposed to take that glaze off with sandpaper before putting the rotors on?
#2
06-02-2007 | 11:28 AM
Super Moderator
Joined: May 2006
Posts: 18,398
From: Wisconsin
RE: Brake Rotors - Rookie mistake?
No. The rotors get glazed from use. The fresh ground surface when you took the rotors out of their box, has been polished smooth by the brake pads. You can try deglazing with sandpaper, then break them in again. If not, then get them resurfaced.
They probably had some kind of greasy coating so they don't rust in the box. Take that off with brake cleaner?? (If not, it's too late now but maybe contributed to your trouble)
Breaking in your brakes:
Find someplace where you can do this without getting stupid & dangerous in traffic.
Stop HARD from about 50 to 10 mph. Don't come to a complete stop.
Drive & let them cool for a couple minutes.
Again, maybe 10 times.
The reason...
Pad material gets imprinted onto the rotor. With fresh rotors, you want that to happen uniformly around the rotor. If you stop completely with HOT brakes, they cool very unevenly because they're clamped in one position.
They probably had some kind of greasy coating so they don't rust in the box. Take that off with brake cleaner?? (If not, it's too late now but maybe contributed to your trouble)
Breaking in your brakes:
Find someplace where you can do this without getting stupid & dangerous in traffic.
Stop HARD from about 50 to 10 mph. Don't come to a complete stop.
Drive & let them cool for a couple minutes.
Again, maybe 10 times.
The reason...
Pad material gets imprinted onto the rotor. With fresh rotors, you want that to happen uniformly around the rotor. If you stop completely with HOT brakes, they cool very unevenly because they're clamped in one position.
#3
06-02-2007 | 11:42 AM
RE: Brake Rotors - Rookie mistake?
Jims right here on the finish of the rotors from the manufacturer, I tell 70 customers a day to buy a can of brake cleaner to clean up their new rotors because of the film , maybe about 10 of the people listen..the others have the same problems 
WheelBrokerAng [sm=americanasmiley.gif]
WheelBrokerAng [sm=americanasmiley.gif]
#4
06-02-2007 | 12:18 PM
Thread Starter
|
Member
Joined: May 2007
Posts: 135
From:
RE: Brake Rotors - Rookie mistake?
AAAHHHHH Thanks for the input, that makes sense now!!! We had some thunderstorms the past couple of days and the brake rotors looked like they "beaded" up (probably the film you're talking about). I had them resurface them and they work fine now, no shutter at all. I did hit em with break cleaner when I put them on but didn't "clean" the rotor so to speak.
Rookie car guy here, still learning, thanks for the input, I love this board. Just glad I didn't do anything wrong LOL
Rookie car guy here, still learning, thanks for the input, I love this board. Just glad I didn't do anything wrong LOL
Thread
Thread Starter
Forum
Replies
Last Post
kevinyu1115
Headers, Intake, & Exhaust
12
02-01-2007 02:38 AM
