Remove the belt and start it up.
Do not run it to long (1-2mins you will not have water flowing) and see if the noise goes away.
Then check all the idler pulleys or just replace them.
The alternator can easily be spun by hand and any noise might be your problem.
Spray some chain Lube or WD to rule out one belt is re-attached.
Last easy check is water pump and fan.
They can be spun by hand.
If you feel any rough movement or noise might be a problem.
Main point is the process or elimination.
Start checking the easy stuff first then get to the harder things (PS pump).
It also might be the belt.
On another vehicle a belt would start making chirps and wines every 40k.
Good luck.
Bookmarks