[pvspartan98]

I have a 98 Nissan Altima and there is a loud noise coming from the passenger side of the engine. I replaced the idler pulley and it didnt fix the problem, also the noise gets about twice as bad when i run the Air Conditioner. Any thoughts on what it could be?

 

[metro273]

Get a long screwdriver and put it against your waterpump while the engine is running...

 

[pvspartan98]

Why

What would that help?

 

[metro273]

It could be bad bearings in the WP or it could be a bad A/C clutch on the A/C compressor. Maybe you should remove one belt at a time and see if and when the noise disappears.