Not clear on what you mean here. The engine will run just fine even if the brakes are poor. Whether the brakes will still be good enough to stop the car is another question entirely. Odds are that the brakes will still be able to slow the car down, but the braking distance will become much longer.
Get a manual on your car and do the job right the first time.
check tires, driveshaft,universal joints Another answer: Do all that. The rotors were not your problem in the first place. They have to do with the brakes. They stop the car. If they were bad, they needed to be replaced. You need to be able to stop your car. You may need a complete front end job.
No, rotors and discs are not the same thing in a car's braking system. Rotors are the metal discs that the brake pads clamp onto to slow down the vehicle, while discs refer to the entire brake system components including the rotors, calipers, and pads.
Yes, If you hit something. Rotors are very essential in stopping, that's what the brake pads are pressed in against to bring your car to a complete stop.
You probably need new rotors
It could be the rotors are getting bad, and it also could be the car's wheel alignment.
There must be either some air in your lines or a weak brake caliper. If you have new rotors and brakes then your problem lies within your lines or your calipers. The vibration means that your car is not braking even. One of your calipers could be loose and the other one is tight. If air is in your lines, then that means even though your car is coming to a stop, your calipers are not getting enough pressure to squeeze as tight as they should be.
Tire out of balance, or bent wheel.
remove the calipers, and there should be a retaining nut on the spindle. (there might be, it varies from car to car) and pull it off. you might have to pry it a little.
yes, but only when the brakes are applied.
When applying the brakes; if you feel the car jumping it's usually the brake rotors need "turned". And, all depending on the age of the rotors and how much your OLD brake pads have scraped them, you might need to buy new rotors. So, my answer is TURN or REPLACE brake rotors. <end>
Get a manual on your car from AUTOBOOKSONLINE.COM and it will take you through it and keep you from messing something up.