Advice & Tips -
Where do you begin with that, they can come from anywhere on a vehicle.
When your vehicle is stationary and the engine is running and noises are coming from under the bonnet or underneath your car, it is never easy to locate them.
Noises can come from the engine, con rods, pistons, tappets, camshafts, injectors, various pulleys, belts, gearboxes, exhaust etc.
Some noises may only occur while the car is in motion, which can significantly change the ease with which the noises are located.
There are additional noises that can come from movement of the vehicle such as the drivetrain, brakes, bearings, wheelhubs, suspension, bodywork and dash area.
Vehicles can produce several noises, it is then a matter of prioritising which ones in particular are of concern to the owner.
In many cases it can pay to go out on road test with the owner so that time can be spent, trying to locate the actual type of noise that is of concern and set about trying to locate and rectify it.
With curing some louder noises this can sometimes highlight other noises that didn’t appear to be there, or have become more noticeable than before.
Alternator belt noises can be so loud, that it might appear that a water pump or other type of bearing is in the process of failing, whereupon spraying the belt with a thin mist of lubricant spray seems to make the noise disappear, much to the owners satisfaction.
Knowing what the noise is, in some cases can make everything less stressful as against not knowing which can be worse.