Why do electric motors whine?
The sources of mechanical noise in a motor include a loose stator core; worn, damaged or poorly lubricated bearings; and rubbing of internal components. Additionally, any structural part of the motor that is excited at its natural frequency can become the source of airborne noise.
Why does my Lexus car make a whining noise?
A whining sound coming from the engine bay is more than likely a worn out serpentine belt. Normally the sound will also get louder the higher the engine is revved due to the belt turning faster. A very easy way to diagnose the problem is to apply some belt dressing to the serpentine belt.
Why is my car whining when I Turn on the engine?
Normally the sound will also get louder the higher the engine is revved due to the belt turning faster. A very easy way to diagnose the problem is to apply some belt dressing to the serpentine belt. If the sound goes away, replace the belt. Another possibility is that the pulleys are worn out. Diagnose this by spraying them with WD-40.
What to do if your head unit is whining?
If a new head unit or amp has been recently added, there’s a chance your RCA cables have a ground loop issue. This is a relatively cheap and easy fix that requires plugging the RCA cables into a ground loop isolator. Figure 2. Ground loop Isolator.
Why does my Lexus have a ground loop?
Figure 1. Lexus IS serpentine belt. You may have ground loop interference. A ground loop can be caused by an ungrounded audio connection which will pick up the electrical frequency from the alternator.
A whining sound coming from the engine bay is more than likely a worn out serpentine belt. Normally the sound will also get louder the higher the engine is revved due to the belt turning faster. A very easy way to diagnose the problem is to apply some belt dressing to the serpentine belt.
Normally the sound will also get louder the higher the engine is revved due to the belt turning faster. A very easy way to diagnose the problem is to apply some belt dressing to the serpentine belt. If the sound goes away, replace the belt. Another possibility is that the pulleys are worn out. Diagnose this by spraying them with WD-40.
Figure 1. Lexus IS serpentine belt. You may have ground loop interference. A ground loop can be caused by an ungrounded audio connection which will pick up the electrical frequency from the alternator.
If a new head unit or amp has been recently added, there’s a chance your RCA cables have a ground loop issue. This is a relatively cheap and easy fix that requires plugging the RCA cables into a ground loop isolator. Figure 2. Ground loop Isolator.