It sounds like it is bad and needs to be replaced because of bad bearings.
Here is a guide to show you what you are in for when doing the job:
https://www.2carpros.com/articles/how-to-replace-an-alternator
INSTALL GENERATOR ASSEMBLY
Install the generator assembly with the 2 bolts.
Torque: 43 N.m (438 kgf.cm, 32 ft.lbf)
Install the wire harness clamp bracket with the 2 bolts.
Torque: 8.0 N.m (82 kgf.cm, 71 in.lbf)
Connect the wire harness.
Connect the wire harness to terminal B and install the nut.
Torque: 9.8 N.m (100 kgf.cm, 7.0 ft.lbf)
Connect the connector to the generator assembly.
Install the wire harness stay with the bolt.
Torque: 8.0 N.m (82 kgf.cm, 71 in.lbf)
INSTALL FAN SHROUD
INSTALL RADIATOR SUPPORT TO FRAME SEAL LH
INSTALL V-BANK COVER
CONNECT CABLE TO NEGATIVE TERMINAL
Torque: 3.9 N.m (40 kgf.cm, 35 in.lbf)
And here is how to replace the alternator on your car (below) I have included both four and six cylinder engines.
You should check the alternator once the job is completed.
https://www.2carpros.com/articles/how-to-check-a-car-alternator
Let us know what happens and please upload pictures or videos of the problem.
Cheers, Ken
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Thursday, November 9th, 2017 AT 10:39 AM