Is it possible to change the ac pulley bearing without removing the compressor?
#1
Is it possible to change the ac pulley bearing without removing the compressor?
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.
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.
#3
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
http://944time.com/porsche/944-ac-air-conditioning.php
#5
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
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
#6
Proprietoristicly Refined
Rennlist Member
Rennlist Member
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
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
Last edited by John_AZ; 10-12-2015 at 11:16 AM. Reason: Shaft seal
#7
He wanted to avoid the expense of discharging and recharging the system. He would have to discharge the system to do that seal.
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#8
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?
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?