WHAT'S THAT NOISE?! Engine Whine #engine #alternator #noise #mechanic #f150

In this video I walk through what I did to diagnose an engine whine, and how to replace the alternator, idler pulleys, and tensioner pulley on a 2010 Ford F150 5.4 3V.

[@someparts]

I had an alternator rebuilt/upgraded output on an E-350 and it was around $125. It still worked but same deal that front bearing was howling at 196k miles.

[@stlyg777]

Well done video.

[@lenanaH]

I have the same sound coming out of my alternator area after driving for a while.

[@hortyist1]

I used a wooden dowel, closet hanger rod. Definitely the alternator

[@lukecaviness5346]

I have a very similar sound coming from my ‘13 expedition, but I’m a bit thrown by the fact that when I listen close it doesn’t sound as much like it’s coming from the alternator, rather it sounds a bit like it’s coming from lower and to the right (when facing the engine). I’m no mechanic though so I’m curious if yours presented the same way or if the whine was clearly coming from the alternator when you listened to it with just your ears.

[@DailyBrewGarage]

I suggest a mechanics stethoscope, that is how I pinpointed it. Lower right likely will be the power steering pump.

[@lukecaviness5346]

@@DailyBrewGarage thanks for the advice. Stethoscope made it clear that it was the idler pulleys on the right. Easy swap and sound is gone.

[@hortyist1]

The cable wire on my 2010 f150 alternator was a 13 millimeter ??

[@AZHerps]

I'm experiencing SAME issues you were, a 2010 5.3 silverado, wining from start increase with rpms, I did narrow it down to alternator, and now I'm on the SECOND one still I have the wine. I replaced idler pulley and belt tensioner, still wine. This morning however (sorry in advance I'm not great with diagnosing electrical) so I pulled the plug on the alternator while it was running, wine stayed, plugged it back in and then removed the positive battery lead from the alternator and BOOM wine was gone, put it back on wine came right back... any suggestions on this issue?

[@AZHerps]

And the two alternators I've gotten were brand new NOT remanufactored

[@DailyBrewGarage]

Thanks for visiting my channel. I'm going to take a guess that your issue is either a bad voltage regulator, a bad battery, or possibly some damaged wiring in the middle that is throwing the voltage off. That is where I would start looking anyway.

[@AZHerps]

@@DailyBrewGarage I appreciate the suggestions!

[@Sawalex19]

@@AZHerps Did you find and fix the issue? Having same issue at the moment

[@AZHerps]

@Alexander S I have not, it's driving me bananas, I had the battery and alternator tested at oriellys they both passed, but it's clearly the alternator making the sound 100%. Voltage regulator was suggested but my truck from what I see doesn't have its own, I believe it's built into the alternator unfortunately I can't get a different brand alternator either unless I want to fork out another 250f plus, or keep swapping out a new one for another new one of same brand just to have same issue, and far as wiring between battery and alternator..well there's just one cable from battery straight to alternator and it looks to be in okay shape..I'm stumped & annoyed because it's obnoxiously loud

[@bassandhotrods]

Good work. I'm 99.9% certain that was a bearing. A pully, in my experience, doesn't sound like that. Besides, a lot of these parts are throw away. If ine part goes bad, the rest isn't far behind.

[@DailyBrewGarage]

I guess I did use "pulley" in place if "bearing" now that you mention it. I was really referring to the bearings in the pulleys. Good point if clarification though. Thanks!

[@macknumber9]

I think bearing too....what are all the noises it could be? Pulley...bearing...and alternator itself?

[@wathalb]

Could you here loud in cab

[@DailyBrewGarage]

Yes, very noticeable in the cab while driving.

[@cubanito813martines8]

Sounds the same😂