What I am wondering is whether anyone here has undertaken a similar task and could offer any tips or advice. Some of the questions I have are as follows:
How likely is it that the evaporator is still intact?
How should the system be cleaned before recharging?
What refrigerant to use?
Have I overlooked anything obvious?
Any help will be much appreciated.
I assume the speed control on both your fans is working well and that the blend flaps and heater vacuum valve are ok.
'Remember that the value of your investment can plummet as well as fall'
The speed control on the LH fan is defunct but will be cured by a straightforward circuit board rebuild. The vent flaps seem to be working but it's hard to tell when the cooling is not working. The heater valve works so I am assuming that the vacuum system is okay. Everything is a bit of a leap of faith but once I get the cooling sorted I can tinker with the rest of the system. I just wanted to see if anyone else on the forum had attempted to resurrect a system which had been dead for a long time so that I could assure myself that it can be done successfully.
If it holds vacuum for half an hour, chances are the major components are still intact.
You can get a set of gauges and a vac pump and do this yourself and I've revived two systems this way but now that we can no longer purchase R134a (or R12) it's not really cost effective.
R134a, which is commonly available, works fine both Delanaire MkII and MkIII systems, I've got pictures on here (somewhere) of both systems delivering air at 4°C or less on warm (24°+C OAT) days. The trick is to get the garage to put enough in. It needs 1150gm of refrigerant (Jaguar tech service bulletin) and most of the automatic charging systems don't deliver this, although they can be made to.
'93 XJS 4.0 - '05 X type Est 2.0D - '13 XF 2.2D Sportbrake
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