Hi,

I'm having difficulty locating the high pressure schrader valve for depressurising the a/c.

Side note - can anyone identify the cylinder mounted to the top rail above the radiator?

Thanks,

Greg

 

that is the Coil above the radiator. I think the V12 has two coils: a primary and a secondary coils.

the long cylinder in front of the condenser with steel lines on each end is the Accumulator for the a/c refrigerant.

I see the shrader valve on top of the compressor. it has a black plastic cap.

 

Thanks for your reply

That appears to be the low pressure schrader valve, I cannot find the connection for the high pressure side..

 

I think it is on the steel line that connects to the back of the compresor..Not sure in the V12 sorry.

 

In your picture see that pressure switch on the a/c muffler? The gizmo with the red wiring connector? That's where the missing Schrader valve should be. That pressure switch is a non-standard fitment.

Here's a pic of my old XJS. You can see the red plastic cap covering the Schrader valve




Cheers
DD

 

Thanks,
would I have to run the engine to depressurise the system?

 

No

Lots of good You Tube videos on this sort of thing


Cheers
DD

 

Wondering how the pressure from the high side can be relieved without a valve..

Would the schrader valve be beneath the pressure switch? Can the switch be removed safely with the system under pressure?

Thanks

Edit- found this pic on carsales, looks to have the same switch, may be a standard feature for the late series III v12's in Australia?

 

Interesting about the pressure switch.

In your case I would simply discharge thru the low side port.

But.....the pressure switch might simply be attached to the Schrader valve, in which case you'd just remove the switch. A small amount of freon will escape as the switch is removed.

If the switch isn't attach to the Schrader valve then you have a large and sudden loss of freon...which can be dangerous

Cheers
DD

 

No matter how it is depressurized, where does the refrigerant go?

I was concerned on my engine swap. solved, it leaked away. empty when I took it apart.



HAPPY NEW YEQR TO ALL
Carl