Finally, after 100,000km, I replaced my stock rotors and pads. No more vibration when braking....But i have one issue. My friend and I worked on it and put some lubricate on the rotors surface( both sides) to avoid any squaks....I think maybe we put too much, the car does not stop sharp enough. it feels kinda loose. but it's getting better now...any comments? things I should check?

 

You put lubricant on the rotors???????? Very bad idea. My advice, clean the rotors and replace the pads ASAP.

 

What in the hell did you put lubrication on the rotors for? Thats a NO NO! You reduce Squeeks by placing a Anti Squeal to tha back side of the brake pad where it mates up to the caliper.

Take your brakes off, clean any thats left on the rotors and look into possibly gettting new pads

 

Never, ever coat the rotors with anything!! In fact, it's usually recommended you *clean* the rotors with soap & water (only) to remove any grease or oils that might still be on them from the factory before installation! Coating the rotors or brake pad surface will prevent the pads from gripping the rotor as they should. Should only lubricate the shim side of the pads, if anything. Yikes! Your current set-up sounds very unsafe!

 

Let's think this one through: brakes stop the car by turning kinetic energy into heat via the friction between the pad and rotor. By lubricating the rotor, you reduce the amount of friction, thus you reduce the braking capability.

You wouldn't grease the bottom of your shoes and go play a game of basketball...

 

Make sure your rotors are 100% clean, and sand down the pads (evenly, of course) to get rid of the current, glazed layer that is hitting the rotor. You do not want anything (eg: lube) on the braking surface of those pads (or rotors). If the pads were brand new, you should still have a huge amount of pad left even after sanding some down. If you don't feel confident with that, definitely buy yourself some new pads (prob the easier thing to do)!!

 

Ok guys...I knew something was wrong at the starting point..I made a stupid mistake...I will take rotors and pads out and do it all over...
Thanks for clarification and sorry for being stupid..

 

took out rotors and pads and cleaned them. It's perfectly fine now. I love it. It's not vibrating anymore!!

 

You're not stupid, just made a rookie mistake, that's all. Glad they're doing better now.