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Why are there Screws holding the Brake Rotors?

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Old 01-31-05, 04:51 PM
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Why are there Screws holding the Brake Rotors?

I broke one of the lug bolts on the front wheel, so i had to replace it. Everything was going smoothly until i had to take the Brake Rotor off. Those 2 screws are Fu**ing impossible to remove. I tried heating them up and still nothing. At the end i had to drill the damn screws out.

Most of the other cars i had to work on, like 300zx or 3kgt, they don't have those screws there at all. Do we even need those?

I'll probably have to go get 2 at the dealer, if they have them in stock.

What a day.

Amel
Old 01-31-05, 04:54 PM
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I believe they are on there simply to hold the brake rotors on while the car is on the assembly line without the rims on. I agree that they suck to remove, I broke countless screwdrivers and bits until I used an impact driver.
Old 01-31-05, 04:58 PM
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Do you think i should put 2 new back on, or not? I may have to remove the rotors again, and i'll have to go through this Again
Old 01-31-05, 05:01 PM
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Originally Posted by BoOsTin FD
Do you think i should put 2 new back on, or not? I may have to remove the rotors again, and i'll have to go through this Again
Nope. The rim will hold it on the hub.
Old 01-31-05, 05:03 PM
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It is nice to have the rotors held flush to the hub in proper alignment. It's a MUST to use an impact screwdriver on those screws - anything else is a waste of time. BTW, it's a screwdriver that you whack with a hammer, not an air-powered tool.

From our good friends at Harbor Freight -

http://www.harborfreight.com/cpi/cta...emnumber=37530

$4.99 for one. I've got one, works GREAT. Make sure to use the right size bits for the screw you're working on - some friends borrowed mine and used the small bit on a big screw, broke the bit. Grrr...

Reinstall the screws with a little anti-sieze and you're good to go.

Dale
Old 01-31-05, 05:04 PM
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Are you talking about these screws (see attached picture)? I'm missing one.

You think I need to got he dealer or just buy it at an automotive parts store (Kragen, Pep Boys)?
Attached Thumbnails Why are there Screws holding the Brake Rotors?-brakes.jpg  
Old 01-31-05, 05:17 PM
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it dont matter, its just there to hold the rotor on without the rim, like goodfella said
Old 01-31-05, 05:21 PM
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wow thats pretty retarded...get an impact screwdriver ...thats what they are for...learn from this mistake
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Old 01-31-05, 05:29 PM
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Originally Posted by GoodfellaFD3S
Nope. The rim will hold it on the hub.
Thanks, I didn't see the reply. I guess I was writing the response/question at that time...
Old 01-31-05, 05:31 PM
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I was hiting the stupid screwdriver on the screw and it made no difference. If you guys think it will be fine without it, i might just leave it.

Amel
Old 01-31-05, 05:48 PM
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Originally Posted by BoOsTin FD
I was hiting the stupid screwdriver on the screw and it made no difference. If you guys think it will be fine without it, i might just leave it.

Amel
Sounds like you dont understand what an impact driver is. Due to an internal gearing system, when you whack the driver it generates a powerful turning moment at the same time the momentum of the hammer is driving the screwdriver bit firmly into the screw head to prevent the it from slipping. Very trick, ( not at all like merely smacking a normal screwdriver) and it is the tool for this job. Use a big hammer, like a 4 pound maul...

The screws are not strictly necessary, as has been previously mentioned they merely hold the rotor nice and lined up while you put the wheel on. Once the wheel is on and the lugs tightened, that's what really holds the rotor. The screws also serve a second purpose, once the screws are removed they can be used as jackbolts in the two threaded holes in the rotor to pop a stuck rotor loose.
Old 01-31-05, 05:52 PM
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I dont think you guys realize how easy those screws strip out....

I have used an impact screwdriver on one, and strip it... and don't tell me i was using it wrong because i wasn't....

on the other hand i have been able to loosen them with a regular screwdriver....
Old 01-31-05, 06:28 PM
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Yeah... just leave them off.
Old 01-31-05, 06:39 PM
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Originally Posted by ejmack1
I dont think you guys realize how easy those screws strip out....

I have used an impact screwdriver on one, and strip it... and don't tell me i was using it wrong because i wasn't....
Yeah, years ago on my car I had to drill the heads off those things. I was careful to use a new, hardened bit on my impact driver but the phillips sockets of the screws literally bent without the screw breaking loose.
Old 01-31-05, 06:47 PM
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My rotor hats from Precision Brakes doesn't have a place for the screw, even if it did I wouldn't use one. I've had to drill them out a couple times, not my idea of fun. In short, why are they there?
To **** you off!
Old 01-31-05, 07:33 PM
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Couldn't get em off so I drilled them out. Brakes have been working fine for several thousand miles since.
Old 01-31-05, 07:39 PM
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My Mercedes W124 (e.g., 300TE) uses a countersunk allen/hex screw/bolt instead of a Philips head with a little "blue" locktite.

Less chance of stripping. . .

:-) neil
Old 01-31-05, 07:41 PM
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I just hit mine with a hammer till it was loose enough to remove with a screwdriver. Never put them back on though.
Old 01-31-05, 07:48 PM
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Hmmmmm....I've taken dozen of these things out of many different cars and have never had the following fail:

Heat with a MAP gas torch.
Spray liberally with PB Blaster or Liquid Wrench
Use impact driver.
Off comes screw.

When reassembling, just use a SMALL amount of anti-seize compound.

As for leaving them out....yeah you can do it but....I dunno, I am just one of those guys that has to have everything in place.
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