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Front Rotors

the blur

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the blur Enthusiast

the blur

Posted
Posted

Time to replace the front rotors on my denali. The factory ones just seemed to warp for no reason at 50,000 miles.

 

any good choices on rotors ??

ChevyTech007 Enthusiast

ChevyTech007

Posted
Posted

If they have been turned and had to much taken off, thats your problem. I don't think that brand has much to do with it. Occasionally we put aftermarket rotors on without a problem. Main thing to remember is to torque the lug nuts. Improper torque and rotors to thin are what causes pulsation.

rmreid Enthusiast

rmreid

Posted
Posted

PowerSlot makes some good slotted rotors that are reasonably priced or if your looking to upgrade your brakes you can get the Baer Aluma Sport brake kit :cheers:

the blur Enthusiast

the blur

Posted
  • Author
Posted

my rotors were never cut. in fact the oem pads are still on there after 50,000 miles !! I personally torque the wheels to 140 ftlbs in the proper star pattern.

they just warped for no reason.

 

but anyway, I see they are not directional veins. are there after market rotors with directional air flow veins ??

larry arizona Enthusiast

larry arizona

Posted
Posted

GM Factory rotors are made in China. They are junk and will warp or rot before a rotor should.

 

Brembo makes a really nice replacement rotor (they are not slotted or drilled). I paid $61 each. These are not made in China from crappy Chinese steel.

 

Napa also makes a nice rotor made in the USA. Also about $61 each.

 

Just stay away from anything made in China and this includes brake pads as well. This includes anything that is considered a Grade A replacement grade from China. Premium Chinese ha what a joke.

 

Good Luck

Bish Senior Enthusiast

Bish

Posted
Posted
gm rotors are made in brazel, not china.

 

 

 

 

 

Brazil...?

 

Either way....they suck. I've got 14000 on my 05' 1500 and had to have the rotors turned. POS's were already starting to shimmy the front end.

 

 

 

 

 

Another vote for PraiseDyno. On my second set. The oem's lasted to about 50K, the first Praise set (X4) about 60K and about 50K on the second set of Praise with plenty of wear left. The pads don't last as long as stock but I don't get pedal pulse and the braking is significantly better IMO. Also seems to have made the low speed abs issue go away.

ken1mod Senior Enthusiast

ken1mod

Posted
Posted

Hey Blur,

 

If you never turned the factory rotors after 50 k, Just heve em turned and enjoy another 50k.

 

As far as warping goes, rotors do that occasionally, even the best. That is why they make brake lathes.

 

Ken

larry arizona Enthusiast

larry arizona

Posted
Posted

Blur, Who is the supplier of the GM rotors? I am curious because last time I talked to the GM engineers at the tech center, they stated that the rotors were sourced from an American supplier and they are manufactured in China. If you know the supplier I will call an engineer over there and ask.

 

It likely is Continetal Tevis, Kelsey Hayes, Bosch or Magna.

 

I must agree though that Brazil is not much better than China.

 

The issue is the steel and metal that they use. It is subgrade in China and I would not be confident that Brazil is much better.

 

North American steel is far superior. Even something made in Mexico is high quality due to the fact they get steel from the USA and held to high standards.

larry arizona Enthusiast

larry arizona

Posted
Posted

Ken1mod,

 

After 50K miles you can't turn the rotors on the new trucks. When the rotors are new they are barely over the min spec. They will be too thin (below min spec) to be turned and still get a clean surface.

 

Buy new and throw the junk away.

 

Also once a rotor is warped, it is damaged. Even turning does not ensure that it won't warp again. They likely will the next time you have a hard stop. The thinner the rotor the more likely it will warp.

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