Saabscene Saab Forum - Saab Technical Information Resource banner
1 - 7 of 7 Posts

·
Registered
Joined
·
2,886 Posts
Discussion Starter · #1 ·
Collected the car this morning having had its A/C compressor replaced. Its got a/c lubricating oil in it now so hopefully it wont seize again.

However I mentioned to them that it was rattly at cold so I suspected the timing chain. They said they had noticed it... but when they started it up there was no real rattle..

But the big difference is the turbo. I'd noticed that it was just about impossible to get it into the red and when you eased off on the gas the needle didn't drop much to the left.. it really just hung round the middle. But now its fine - pushed it into the red this morning and got it almost down to the left hand end when I was slowing down.

Has anyone else had things just fix themselves when the car has come back from the garage (I find it tends to be the other way round). All I can assume is that all the work has moved a hose or something.

Steve
 

·
Registered
Joined
·
8,216 Posts
No, as you say, the only surprises are usually unpleasant ones. It certainly sounds like someone found a loose vacuum hose and reconnected it. That can affect your boost and vacuum and your boost gauge's perception of your boost and vacuum.
 

·
Registered
Joined
·
1,908 Posts
Which garage did you use Steve?

Were you suitably impressed with there level of service in general?

Re: A/C Compressors.. some dealers say theres no maintainance necessary for A/C units, unless they run low on gas.

Does anyone know if the lubricating oil in the AC coolant looses effect over time, and whether it should be totally replaced at a specified interval... based on experience?

There's nothing in the Saab service scedule to suggest so, but experience can be better than the official guide sometimes!

Thanks in advance of any feedback.
 

·
Registered
Joined
·
2,886 Posts
Discussion Starter · #4 ·
I used ACG on Bouncers Lane in Cheltenham. They do general motor repairs as well as being an Air Con specialist.

They were very good - we would have had the car back on Monday (i.e the same day) if the suppliers had not shipped the wrong pump out.

Not sure how long it took but labour charges were £60 and they charged £60 for the regas and threw the oil in for nothing (should have been £10).

They said they always put oil in to prevent things like pumps seizing.. not sure if its in there by default though.

Steve
 

·
Registered
Joined
·
1,908 Posts
Thanks for the info Steve,

My guess is that A/C systems have a lubricating oil in by default. All the advice states that the A/C pump should be run at least once per week (even in the depth of winter) to ensure the pump stays lubricated and doesn't cease up. Hence, there must be some form of lubrication in the coolant anyway.

I am wondering whether I should get my system refiled, to ensure it's tip top, but only practice 'preventative maintainance' where it is really necessary.
 

·
Registered
Joined
·
8,216 Posts
There is oil in the system all the time.

I understand that when refilling the system, there is a certain volume of oil specified as well as a certain volume of refrigerant. Someone who knows what they're doing will flush out any old refrigerant and oil and replace with the specified volumes of new refrigerant and oil.

The advice not to leave the A/C system idle for long periods is something I have heard from both a Saab dealer and an A/C specialist, and I can understand the reasoning. my cars have ACC and I leave it on permanently. The only problems I've ever had with it were a broken wire and the clutch gap going too wide (on two cars with Seiko compressors).

A/C is really useful for de-misting the windows in winter anyway and I don't understand why anyone would not want to use it unless the cars with manual A/C can only supply unheated conditioned air?
 
1 - 7 of 7 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top