Scion noise
#1
Scion noise
I have a 2007 Scion tC. It just started making a weird deep whistling/humming noise and It started getting really hot under the hood but the temperature gauge isn't moving up it is in the middle. Any ideas on what it could be?
#2
does it vary with engine speed? if so, first thing I would check is the alternator. check voltage at battery when idling. should be around 13-14 volts. when the diode pack goes it makes a very distinct whistling/squealing sound. may or may not be that, but it is pretty easy to check and eliminate from the list.