Thread: Loud Whistle

04 4.6L. it has an extremely loud but intermittent whistle that happens more frequently the colder it gets. doesnt happen at all in the summer. pitch and volume vary with rpm's. dealer says its the alternator. any ideas?

anybody?

Hard to say luke without hearing. But that sound could b the alt. have u ever changed it before? It is possible

----------

Some go and some last forev. I think Alex has has had the best longevity with one lol

How many miles, or rather km, are on your truck Luke?

A sound clip
Will help


Sent from my iPhone using Tapatalk

i'll see what i can do with a sound clip. i havent changed the alternator before but maybe thats what i'll do. 235,000km lol

If it does it all the time. When col remove the belt and see if the noise goes away. At least u can narrow it down to the drive belt system


Sent from my iPhone using Tapatalk

thanks, thats an idea. i have a 45 minute drive to work every morning and its driving me mental lol

Also. If it does it at idle. U can pour some water on the belt and see if the noise changes or goes away. If it does them it's the belt slipping on the pullies. Simply replace the belt. If u do narrow it down to the belt system. Spin all the pullies by hand (engine off) an see if u feel a pulley that makes noise or feel something abnormal.


Sent from my iPhone using Tapatalk

changed the belt this winter. whistle was before and still persists. it doesnt sound the same as a slipping belt, but i could be wrong. it sounds literally like a whistle blowing