Looking for AC Compressor Pulley/Bearing
 

Does anyone know where I can purchase an AC pulley only for the N62B48? (4.8iS)

My AC works but the bearing is making noise. I was finally able to use a stethoscope with help of a friend and pretty sure it's coming from the ac pulley bearing.

Sound comes only when I rev and not at idle regardless of the AC clutch engaging or not.

The sound is well like how a dry bearing would sound like, like a metallic whirring noise.

I've searched on Google and eBay with no luck. I believe the oe unit is a Calsonic Compressor.


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In the past 10 years it has been cheaper to buy a compressor than the clutch when I have checked.

Example my 1999 dodge ram had a bad clutch. Clutch was $299 or something stupid crazy like that. Compressor was $120 with new clutch.

The compressor I put on our 2005 X5 was $100 or $125 new with lifetime warranty. I didn't price a clutch. This is for a 3.0 and may not be the same compressor just wanted to throw that out there.

Assuming your V8 has the AC on a separate belt all by itself like the 3.0i (is that right?), it's a pretty simple test to remove just the AC belt to confirm that the noise goes away completely.

Remove the AC belt.
Remove the pulley and measure the bearing dimension.
Use only Koyo, Nachi, NTN.

Bearing goes out at 160K-200K miles range.
AC compressor lasts about 180K-250K range, give or take.

Looking for AC Compressor Pulley/Bearing
 

Bearing is pressed in the pulley and if you look at the back of edge it has dimples holding the bearing. Which you eventually break off as you press it out. I used a press before on another compressor I rebuilt (e70) but was not to happy of the process (more ocd issues than anything else lol) so wanted to buy a new pulley with the bearing already installed.


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Don't worry about the dimples, you just press the old bearing out using a press or block of wood and gently hammer it out. Just common sense.

If you don't want to replace the bearing, then just re-grease it.
Remove the pulley, gently pry the oil seal out, clean old grease (there is usually nothing left behind), press in some HD grease (Castrol etc.).
Re-install the oil seal.
This re-greasing business gives the bearings another 30K-40K etc, as long as there is no excessive play in the bearing.

I replaced the 1998 Volvo Ac Pulley bearings and you can see the dimples in the DIY:


DIY: 1998 S70 GLT AC Pulley Bearing (also Alternator and PS Pump) procedure
https://www.matthewsvolvosite.com/fo...hp?f=1&t=81512

Was this noise between 2800 and 3000rpm?

I have some whining noise also...