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Discussion Starter #1
On a whim I took the car to kwik-fit for an air con recharge, the called to say no charge as the compressor is not working, whilst I thought that might be the case it is one way to check the system at no cost but the cars air con is much colder than it was before the trip to kwikfit. Is replacing a compressor a nightmare job?
 

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It's not too difficult depending on access, on an Alfa I'm sure they've made it more difficult than it should be.

They're usually held on by a few bolts, uncouple the pipework and then get it regassed.

Loads of videos on YouTube about it. See Scotty Kilmer, Engineering Explained or Eric the Car Guy.

Ratchet and Wrenches does a good video on troubleshooting the compressor, one of my favourites:thumbup:
 

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I don't know what sort of a job it is on a 166, but in general terms, it's like a big a;lternator but with pipes on. You really ought to get the system emptied first though (it's illegal to discharge refrigerant into the atmosphere 'cause it's a nasty greenhouse gas). Also, the lubricating oil in those systems absorbs water very rapidly and can trash the system very quickly if left open to atmosphere for more than about 15 minutes or so. Best to cap the ends of the compressor pipes with something until ready to be connected. Most of the hose unions have special O rings in them (usually green). These needs to be replaced every time the unions are disconnected.

Personally, if the aircon is cold and the compressor isn't making a noise, I'd just roll with it until it stops working again! Places like Kwikfit use automated charging stations that the "technician" just plugs in andd does what he's told on the screen. I wouldn't have that much faith in a knackered compressor diagnosis from them. Worth at least seeking a second opinion from a mobile aircon specialist. "Alfapat" of this parish (who doesn't seem to post these days) is over in Cambridgeshire, I think, and is very knowledgeable on these things.
 

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Discussion Starter #4
Much appreciated Avocet, I'm not rushing in with spanners as you are right regarding air con gas.

Will roll with it for now.

Cheers
 
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