Granturismo 4 Year Main Dealer Service Costs - Help Please!

[dickygrace]

Car I had my heart set on didn’t work out unfortunately . Good car for someone but not for my long term plans. The hunt continues!

Sorry to hear that Gilbert, I’ll keep looking for you.

 

[midlifecrisis]

Is a 4 yearly Aircon regard necessary if the system is working well?
I can understand doing it to ensure that you have the right amount of gas in the system but if it's working then why bother?
I read elsewhere, that some building Aircon systems have had their gas for over 10 years without issue.

 

[Oneball]

The air con refrigerants contain lubrication don’t know if it deteriorates. Car air con compressors are quite interesting as they’re a sliding piston like an engine.

 

[conaero]

We do it. It’s an indicator if you have AC issues looming if less than the recommended 600g of R134a is recovered.

 

[Zep]

The air con refrigerants contain lubrication don’t know if it deteriorates. Car air con compressors are quite interesting as they’re a sliding piston like an engine.

The refrigerant itself doesn’t contain oil. Some of the little home use cans you can buy have oil added, but it is rarely necessary. This is (another) common misconception. Commercial bottles used with the machines contain no oil.

Your right about the compressors, the cam rotor used in some of them is quite an interesting mechanism.

Matt makes a fair point about knowing how much gas is recovered will tell you if leaks, but there is no chemical or mechanical reason to replace refrigerant, you can just put it back in if it hasn’t lost any.

 

[Oneball]

The refrigerant itself doesn’t contain oil. Some of the little home use cans you can buy have oil added, but it is rarely necessary. This is (another) common misconception. Commercial bottles used with the machines contain no oil.

Your right about the compressors, the cam rotor used in some of them is quite an interesting mechanism.

Matt makes a fair point about knowing how much gas is recovered will tell you if leaks, but there is no chemical or mechanical reason to replace refrigerant, you can just put it back in if it hasn’t lost any.

I thought refrigerant contained a polyester lubricant?

 

[Zep]

I thought refrigerant contained a polyester lubricant?

No, it is just (in the case of R134a) tetrafluoroethane, it has no inherent lubricating properties.

You can add oil, for automotive it’s PAG oil, and this oil is partially miscible in the refrigerant which aids its movement around the system. But a bottle of R134a from the wholesalers will not have oil any in it. Too much oil will also coat the inside of heat exchangers and reduce their efficiency so
too much is just as bad as too little.