I have a 1996 Accord Ex (138000 miles). Recently I have changed (300 miles ago) all brake rotors and pads. My rear brakes are making a crazy sound. Suppose you take a syringe and remove the needle and hold the inlet. Now if you try to take the plunger out you will not be able to do that as vacuum will create. If you apply more force to take the plunger out, then the plunger will come out with a loud sound. I am hearing similar kind of sound from rear brakes when I press the brake. Moreover, the sound is not coming every time. May be 3-4 times out of 10 times I press the brake.

As I said all rotors and pads are new (300 miles ago). When I start the car I listen some grinding sound from the front brakes. This goes after driving 10-15 min.

I will highly appreciate if anybody kindly explain the reasons for these facts and the solutions.

Thank you.