Ok, Here it is.
See My Garage for Vehicle Specs.
If needed I'll recap if I get a reply.

My 2001 S60 gave a Low Battery Voltage Message on the panel display. Only 2 weeks after a new Bosch battery was installed.

Checked with Volt Meter and sure enough 11.2v and no variance with engine rev.

Also when engine revs it sounds as if there’s a spin down of some component?

So, is that sound a clutched Alternator or is it some other item (Transmission perhaps)?

I ordered and received my replacement Alternator and it came with the pulley? I was bracing for the task of removing and replacing the pulley as all indications were the Vehicles with Automatic Transmissions all had Clutched Alternators. And I was required to swap the pully.

I need urgent help with positively Identifying my Alternator before I make a costly mistake and install what I believe to be a direct drive alternator.

Thank you,

 

The alternator is not clutched. More than likely the alternator is fine. There is an externally mounted regulator on the rear of the alternator that were notorious for going out. I would remove the alternator and have it rebuilt before I would get a rebuilt unit from one of the local auto zone.

 

Thank you for a quick response dsharp.... In your opinion, if I take it in to the Rebuilders shop I'm thinking of, Would they only change out the Regulator for a much more reasonable $$.

Also, does the mechanical spin down noise I'm hearing come from the Alt. or what?

 

Most shops that I have used will change the bearings and brushes, etc.while they have the alternator apart. It will be less expensive than a new alternator but, probably more than a mass produced rebuild. There's a wide range of quality/price in bearings, rebuild components, etc. I always preferred to have my own parts rebuilt. I can't think of anything on the engine that would spin down. There is a tensioner that could be making noise but everything is belt driven and should be running at the same rpm as the engine, if I understand what you're referring to as "spin down"

 

Please keep in mind I am working by myself without an assistant, I it possible to rev the engine from the engine compartment? I.e.; the electronic throttle? Some override ability, so that I can get an ear to it?

Otherwise,
I will need to re assemble the car and start it again prior to getting a Video/Audio of it. I have done this with one of my other vehicles. My mistake for not doing it before. I assumed it was the Alternator Clutch slipping and not engaging due to a failed unit. If it is not the Alternator I may have a bigger problem.

 

Take the alternator to a rebuild shop and have them test it. They will spin it with an electric motor and determine if it is putting out the correct voltage and amperage. I don't think you can get to the throttle body to rev up the engine. I'm not sure there's a way to rev up the engine. I've had my engine out of the car and I don't recall unhooking any throttle linkage. If you already have a rebuilt alternator I would keep the original unless the core charge is extremely high.