2004 v70 Frozen Pulley on A/C Compressor, shredding bel

Faust · Post by **Faust** » 03 Mar 2015, 12:38

After shredding two serpentine belts I realize that the pulley on my a/c compressor is frozen. I can't see it very well, but when I feel around, the actual pulley is frozen but the interior portion (clutch?) does spin. Since I replaced the first belt, the fuse (#8 in the underhood box) has blown every morning when I start the car. Since this fuse also protects the accellerator pedal sensor and the cooling fan for the ECM box, I had been misled as to the cause. I have disconnected the power wire to the compressor/clutch, but that was after the belt shredded the second time. Before shredding the belt, the compressor made a good deal of noise. I suspect the compressor is in real trouble. Can anyone suggest a means to free the pulley so that I can replace the belt and operate the car pending replacement/repair of the compressor. Alternately, does anyone know the size of a smaller belt which eliminates the a/c compressor?

Post by **oragex** » 03 Mar 2015, 17:36

This is for an older engine model with an extra idler pulley, so not sure it will work, but worth a look

https://www.matthewsvolvosite.com/forums ... =1&t=51677

Post by **abscate** » 03 Mar 2015, 18:32

Well, we are finally getting this solved. I don't think P2s were sold without AC but maybe you can. Approximate the length of the belt skipping the AC compressor and then try a bunch at a FLAPS until you get one that works

Faust · Post by **Faust** » 03 Mar 2015, 18:33

Having thrown away my original "sketch from life" I found this diagram for a 2004 v70.
http://www.volvopartswebstore.com/showA ... evel=11155

On this arrangement the belt turns the alternator in a different direction than the crankshaft, A/C compressor and the P?S pump. Does the alternator "know" what direction it is turning? If not, a measuring tape should give me the correct size. If the direction of rotation is required, some sort of idler pulley seems to be necessary.

Faust · Post by **Faust** » 03 Mar 2015, 18:37

abscate wrote:Well, we are finally getting this solved. I don't think P2s were sold without AC but maybe you can. Approximate the length of the belt skipping the AC compressor and then try a bunch at a FLAPS until you get one that works

If I can find a Gates belt number, the last two digits are the length, It should be easy from there. My cincern is the lack of an idler pulley.

Post by **oragex** » 03 Mar 2015, 20:43

Try giving the alternator pulley a sharp spin both ways then stop the pulley by hand.. the slutch should keep turning a bit. See if it does it both ways. I see no reason why it won't generate electricity both ways, but maybe the wiring or the clutch won't allow it.

Faust · Post by **Faust** » 03 Mar 2015, 20:52

oragex wrote:Try giving the alternator pulley a sharp spin both ways then stop the pulley by hand.. the slutch should keep turning a bit. See if it does it both ways. I see no reason why it won't generate electricity both ways, but maybe the wiring or the clutch won't allow it.

ALternators have a "clutch"? There is a lot I don't know about alternators. I only need something to work for a few weeks. There are four feet of snow here and I want a JY compressor. My "inner child" is offended by the idea of a $600 compressor in a 10 year old car.

Post by **abscate** » 04 Mar 2015, 04:07

No clutch. The alternator will work electrically spinning either way, the diodes will make DC from either waveform. One thing to worry about is the alternator cooling-I believe there is a cooling fan pushing air back through the alternator which might not work as well running backwards. Maybe not important for a few weeks in winter.

Post by **abscate** » 04 Mar 2015, 04:24

Faust..thinking about this a bit. The interior part that spins is connected to the AC compressor, ie, the expensive part. It might be worth taking off the compressor and seeing if you can get the pulley free. The bearing is probably a 50 buck part. I'll see if I have a compressor diagram.

I've got the AC manifold and vacuum pump and I'm always in MA on business. I bet we can get this compressor off, seal up the lines, and recharge without having to replace the receiver if we are quick. (My mechanic did this to my VW 8 years ago and that AC works great.

PM me to set up, got a lot of kharma to pay back...

Faust · Post by **Faust** » 07 Mar 2015, 08:48

Just a follow up. I pulled the teeth from my "inner child" and got enough money from the tooth fairy to buy a rebuilt compressor from Advance Auto. $350.00 after promo code w/tax and core charge. Total cost $570 with install ($130) evacuation and recharge ($90). I did cut my hand showing them how to get the serpentine belt on. It is an exact fit and seems to work well enough. In this temperature it only operates when I put on the defroster. Autozone had one for about $100.00 less, but previous experience deterred me from that one.