Originally posted by TSIN03SE:
I get faint turbo-like sound at low rpm. How can I determine if this is alternator whine?

It's original battery and alternator since 1998. No problems starting or lights dimming so far. Is there simple check I can do?


7 years is a long time for a battery and alternator.

Battery test. Engine off, turn lights on for one minute. Voltage should be 12 to 12.5.

Alternator test. Engine running, voltage should be 14 to 14.5.

In addition, you may want to disconnect the alternator belt to see if the sound is still there. If it is the bearings, there was a post earlier on that.

http://www.contour.org/ubbthreads/showflat.php?Cat=&Board=trouble&Number=621508&Forum=trouble&Words=tensioner%20pulley&Match=Entire%20Phrase&Searchpage=0&Limit=250&Old=allposts&Main=621508&Search=true#Post621508

Last edited by Tony2005; 10/23/05 11:05 PM.
"Always do the cheap and easy ones first." 1996 V6 ATX 96K miles