Austin09

Hi all,

I am trying to fix this annoying noise I have from the ac compressor.
I've spun the pulley without the belt and its very noisy so needs changing.

I don't want to pay someone to discharge the system and change my compressor - the unit is fine minus the bearing. I want to remove the pulley, has anyone had any luck doing this with the compressor still on the car? I've searched for some time today and couldn't find any posts or guides, but I did manage to find the bearing size!

I might have to drop it down but leave the refrigerant lines connected... just to get a puller on (I live in england so everything is rusty, always best to expect the worst job imaginable!).

Most mechanics aren't interested in doing this but will change the whole compressor for me.

Austin09

Should have said, I have a 944 turbo, so there is probably even less room than the n/a.

944Time

I've heard that you can pull the pulley with the A/C installed in the car.

http://944time.com/porsche/944-ac-air-conditioning.php

marc abrams

I've tap off a/c pulleys before with just a hammer without damaging anything.

griffiths

Austin,

The pulley's bearing inner race is a 'slip' fit on the aluminum nose of the compressor.
Just be careful you pull it 'straight' out and put it straight on: if you get any burrs
on the aluminum nose its going to be a bugger.

When you press the old bearing out and the new bearing in be-careful not to
distort the pulley: the pulley's bearing cavity is not a sold section of the
pulley.

There are usually 'shim' washers under the front clutch hub between
the hub and a step on the compressor shaft. The shims set the air gap
distance between the hub and the pulley. When you remove the hub sometimes the shims are inside the hub bore and sometimes you will find them sitting on the shaft. A reasonable air gap is .015" to .030" checked at 3 places 120 degrees apart; between the hub and the pulley mating faces.

Porsche AC Troubleshooting Basics

John_AZ

The compressor coil can be removed/changed with the compressor in the car.

My DIY:
http://forums.pelicanparts.com/porsc...t-car-diy.html

Follow Griffiths pro advice above to complete the task.

Edit-By the time you get to replacing the bearing, you may want to replace the shaft seal as well....

J_AZ

marc abrams

He wanted to avoid the expense of discharging and recharging the system. He would have to discharge the system to do that seal.

Austin09

Interesting... thanks. I just found this on their forum too
http://forums.pelicanparts.com/porsc...stall-car.html

Looks like a near impossible job on the turbo as I thought. I'll see how easy it is to remove the radiator fan shroud or I'll have to hand this one to a garage to tackle.
Dropping the compressor down off the mounting would have been my approach but apparently its really hard to get back on after. If i had a ramp and a tranny jack I'd probably manage it, but lying on my driveway I don't think I stand a chance!

Any thoughts guys?

griffiths

Compliments of Dean

Dean's 49.00 Ride uP

Austin09

Thanks all - If i attempt myself I'll add some pics to help anyone else to do this job in the future.