Water pump whining noise when belt is off

https://m.youtube.com/shorts/Q3GECZm2vUY
makes a whining nose, all other pulleys are good except alternator it has a bunch of resistance and is a bit crunchy in some spots. here’s a video
https://m.youtube.com/watch?v=GGKrh_pVPuE
this is my alternator, ^^^notice how it’s a bit crunchy and binds up at the end of the video

if you guys check my last post it is the noise my truck was making when the belt was spinning

 

It definitely doesn't sound normal.
But you have to remember, the fan is bolted to the fan clutch.
So it's hard to "feel" how much resistance there really is.

I like to grab the fan and lift up/down on it. Then watch the pump shaft (pink part) for movement up and down.
This gives me a better idea of the state of the bearings.

 

not much play i tried let me go try again, look at my alternator video i just posted, that has the be the problem

 

okay i lied when i lift it up there is a little bit of play up and down not much though

 

A tiny bit is normal.

The alternator is shot. Time for a new one. Don't go cheap on it.
I'd go with a Denso Reman at a minimum. I've used them, so far I've had good luck with them.

 

okay boss thank you. man but that water pump whining noise is scaring me now. you think if i change the alternator i’ll still have some sort of noise down there?

 

and the denso how
much will that run you? i got a quote for a 9amp one for $240 i’m not sure what brand though

 

I can't say I've ever heard a water pump make that kind of noise.
But then again, 90% of my dealings with a water pump is after it leaks.
I typically lift up/down on them and give them a quick spin when doing belt swaps.

I don't do this stuff daily. I only do it to save myself, friends, and family money on repair bills.

 

RockAuto has them for $205.xx + $75 core
That is for a 130A.
If your truck has the towing package, you want the 130A one.

 

BTW, your truck has the towing package.
I know because the fan clutch is PINK......

 

shit okay so it’s the 130A then so it’ll be a bit more pricier

 

i really appreciate the help though man thank you

 

I have a local electrical shop that will rebuild my OE alternator on site, including R&R, for less than parts house bits.

I'd have them do it even if it was more.

Anyway, you might see if such a gem exists in your area.

 

what year how many miles?

going to spin my alternator now…

Just did the water pump. Wasn’t too bad.
Only thing I’m dreading is the serpentine tensioner. I have a new one sitting in box.

supposedly it’s angled and held on from the front and side, requiring more component removal to replace. Such as get alternator and compressor out of the way to access. Ridiculous. Most car serp tensioner is a small piece held on the front of the motor with 2 bolts.

does anyone know if you can just replace the front bearing on the alternator? Other cars you can.
Though I understand that may not be enough. At this years and miles the alternator is old. So is its regulator and other bearings it may have deeper inside.

and if DENSO reman is as good as new?
Definitely cheaper than a higher amp alternator


whoops sorry highlighted the wrong 100amp one green instead of 130A towing

dealer shows price not much higher $230. Not sure if new or reman.
Sometimes dealers stop offering new and only reman. For example certain other brand old car axles.

 

mines an 06 with 240’000km
do you need a new alternator aswell?

 

damn less miles than me only 149k mi, uhoh

 

what year you got?

 

08
no idea if age would be a factor vs miles
I imagine miles more since it’s driving that spins the bearing and not sitting parked

google: "about seven years
Most alternators will last between 80,000 and 150,000 miles"

 

yup, did you need to change your alternator?

 

haven't yet but gonna check it after seeing this post
did the other pulleys, WP, P/S pump, fan clutch
probably should replace crank pulley