check for worn out brakes
check the wheel bearing - if it's a constant grinding noise, it is probably the bearing. New ones cost around $100 or so from an auto parts store. You can change it yourself if you have some skill, and you can actually do the change without removing the whole spindle assembly - the bearing is attached to the spindle by 3 bolts on the engine side of the spindle. Remember to take off the axle nut first, so that the bearing can just slide off of it. And also remember to disconnect the ABS sensor - and reconnect it when done.
Its hard to say... do u know where the noise is coming from?
depends on where the grinding id coming from
sounds like the brake pads in front or back are worn out, if so need to change them before driving.
It depends on where the grinding noise is coming from. Most of the time the grinding is coming from the brakes and the brake pads need to be replaced. If they've been grinding for a while, the rotors will need to be resurfaced or replaced. Other possibilities for grinding are worn axle bearings, or a problem with the clutch. If the clutch goes out, there will be a grinding noise when you try to shift gears.
Defective left front wheel bearing. Have this repaired ASAP, as it can cause an accident.
lower ball joints need lubed up or probably replaced.
Brake pads are worn out=========Replace.
Without more detail, my first guess would be that you have worn down your break pad to the metal on the side that is grinding. What your hearing is the metal from the pad grinding on the rotor. If this is the case then you may hear it get worse when you apply pressure to the breaks. You will want to replace the pads on "both" sides of the car and you might need to replace the rotor or have the rotor turned that is on the grinding sound side ASAP.
When driving the railroad arms will lower indicating a train is coming. However, the conductor will also alert drivers or passerby's by sounding the horn also.
Your clutch throw-out bearing may need replaced.
If the noise changes pitch under acceleration and deacceleration I would suspect the carrier bearings or pinion bearings are shot. If there is no change under acceleration or deacceleration I would suspect an alxe bearing is shot.
Perhaps a pebble got stuck in either cv joint or in behind brake caliper