Re: loud continuous chirp
If you have a tensioner on your serpentine belt, it could be that either the tensioner is losing its ability to keep the belt properly tight, and the belt is slipping, or the belt itself could be damaged.
If the noise is worse when you rev up the engine, but quiet once the engine has reached a steady speed, it is likely the belt is slipping.
The heater blower motor adds electrical load, causing the alternator to have to work harder. If the noise can be influenced by the blower motor, then the alternator may be slipping, but the cause of the slippage could be tensioner, damaged belt, or liquid/grease/etc on the belt or pulleys.
tom
|