Ferrari 308 - A/C Recharge

I believe those are r12 ports on the compressor.

 

Yes those ports in the picture are R12 ports. For reference “low side” is “suction” “high side “ is “discharge” screw on aluminium adapters are available to convert r12 ports to 134. From memory the suction adapter screws straight on without any changes required. The discharge adapter has a Schrader valve built into it and requires the existing valve to be unscrewed from the r12 discharge port


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Readily available on eBay, any automotive a/c supplier and I would think most workshops that do auto a/c would have them. Not expensive


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Stop for a moment and realize that you think your system is R134, but we're seeing R12 ports.

You need to do more than just find a screw-on adapter.

 

Yes, if you have a 134 conversion whoever did that would (should?) have installed the required R134 fittings on the compressor. It seems likely you still had the old R12 freon in your system.


Fyi, the conversion requires flushing the system to get the R12 oil out, which is not compatible with the R134 oil. Old orings on various fittings are replaced with the green type which are 134 compatible rubber. The dryer is typically changed out, and 134 charge fittings installed on the compressor. The really thorough conversion would also replace the hoses with barrier hoses, the 134 will diffuse through the old style rubber, although many do not do this an accept the diffusion leakage and top up every few years. You need an ac shop with flushing equipment to do this properly, although you can buy aerosol cans of flush, new 134 oil, change o rings and charge yourself if you are an ambitious diy type.

 

This is what I used. You need a vacuum too. $100 at harbor freight.

https://www.amazon.com/gp/product/B000VAQQ3Y/ref=oh_aui_search_detailpage?ie=UTF8&psc=1

If you are not going to use R12 or an equivalent, then you should probably crack the system, change all the serviceable parts and do the switch to R134. You can put R134 quick fit gauges on too. Likely the compressor seal leaks too at this point in time.