Possibly loose belts slipping on the rotating pulleys. Need tightening which isn't a complicated job but need to be careful not to over tighten which could cause damage to the pulleys and the belts could break if old.
When it is time to change the brakes on your 2001 Mitsubishi Montero, they will make noises. There could be a grinding or squealing noise that you will hear.
Loose or glazed fan belt?
Brakes most likely
squealing or squeaking or a high pitched sound of discontent.
You need to lubricate and clean it.
Rims,Body Kit, Lowering,Tints.
iwhat does the noise sound like. most likely a worn belt or belt tensioner if its a high pitched squealing noise.
WD40 applied at appropriate places.
If you hear the squealing when applying the brakes, the pads are worn out and need replacing ASAP. Failure to replace the pads immediately will result in worn out rotors which will also need replacing. If the squealing noise is not when braking it may be a worn drive belt.
Water in the drums or on the pads.
make sure the gapping on the plug is correct to what the vehicle needs
the water is entering a moving part that it should not enter and or effect.. make sure your belt is tight and have a shop check your wheels if that's where the noise comes from