Grinding noise

Most common suspect is a binding upper strut mount. To identify that, reach over the top of a front tire, and wrap your fingertips around part of the coil spring. Have a helper slowly turn the steering wheel to one side, then the other side. You should feel the spring rotate smoothly with the tire. If the upper mount is binding, you will feel the spring wind up and build tension, then suddenly pop free and turn, or you will feel excessive roughness as it turns. That binding does not occur when the car is moving because bumps in the road help the strut mount to rotate.