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I will leave this information for the future (google find me) - i believe it really might be useful.
In case someone will be looking for an AC EVAPORATOR for Facelift models of XJS 1994 and +
Code for it - JLM20609 - Good luck finding and NEVER EVER buy used one. It was created to be broken;
Write an email to this company - sales@coolerclassics.com
Ask for a EV8491 - model of evaporator;
±380 USD + Shipping fees;
And you will receive a shiny new one exactly as you need (The one in the picture is slightly used one - but you get the point).
#Evaporator #XJSevaporator #XJSACEVAPORATOR #JLM20609
It took me 2 months to find it.. hopefully will save some of all of yours time!
Ok, today finally installed - Refreshed Heater box (New AC Evap + New Heater matrix), new heater matrix hoses. Hopefully moving towards testing the running engine and it's temperatures really soon.
Refurbishment of Heater box was quite intense - checking if all sensors are working and trying to fit new AC Evap was a challenge; Cleaning all internals from disintegrating foam - challenge for my nose All motors are lubricated and should last (hopefully) for many more years;
Good morning, finally update. Car is assembled and tested. Conclusions - temperature now goes in the middle between N and Red. Then Electrical fan kicks in and temperature goes down to N. As soon as i stop in traffic jam (Outside temp is +15) temperature once again starts raising until el. fan turns on.
So NO stable temperature... In general car is not Overheating up to HOT and not spilling out any coolant anymore, but still not stable in terms of engine temperature.
I dont know what to check even more
...
Have you got your auxiliary electric fan wired up to come on with the aircon compressor? . This will stabilise the temps. Also what type and size of electric fans have you get?
Dear Greg, it's wired up as per factory spec. AC compressor is finally up and running as well (previously it was leaking and not working);
Car is 1994 V12.
Dear Greg, it's wired up as per factory spec. AC compressor is finally up and running as well (previously it was leaking and not working);
Car is 1994 V12.
I have no experience of facelift cars; but I have an idea that on facelifts the compressor does not automatically come on with the compressor; but relies solely on the pump inlet thermostatic switch.
Why not try wiring the aux fan to come on with the compressor? As a test, rig up the fan to come on with the ignition and see what effect this has on coolant temperature? To do this you just need join together the two wires connected to the terminals on the thermostatic coolant switch (on pre facelifts it is on the pump inlet, on facelifts maybe still there, or in the radiator, I am not sure).
Greg
Last edited by Greg in France; May 5, 2022 at 02:32 AM.
That coolant flow indicates that the atmospheric catch tank in the wing behind the stone baffle is being pressurised from the inner wing header tank as the car overheats and coolant is expelled. Filling the V12 with coolant needs care, did you bleed the radiator carefully and run the car with the defrost setting on, preferably pointing uphill, while you bled the radiator and filled it through the bleed screw hole?
Before doing anything else I suggest that the first thing is to renew the mechanical fan viscous unit and check the fan belt. Second thing is to verify that the auxiliary fan is working properly and that the temperature switch on the water pump inlet is accurate and working.
Thirdly: what temperature thermostats did you install (there are two, one each side) and are you 100% sure they were of the correct type that
1) blocks off the coolant cross pipe when hot? and
2) has the 1/8 inch bleed hole in the rim so that when the thermostat is fitted the hole is uppermost?
See this thread: https://www.jaguarforums.com/forum/x...ywhere-213647/
In 1 paragraph u mention 6 items i have never heard of ; wings of stone baffled by brewhaha; what r u saying? Where can we view these blinker fluid type gizmos? Are there pictures? Are they directltly attached to th muffler bearings? Is it necessary to remove th entire body of th brit mobile to access these unknown devices i am a mechanich of 50+ years and in 1 paragraph you hav me conflubergastetified. Well done .
Not sure if you have fixed the initial issue of overflowing atmospheric tank under the wing but if you haven't suggest that you check you have the correct pressure cap on the under-bonnet expansion tank and that it is working correctly. The cap works as a two way valve allowing hot, expanding coolant to exit the expansion tank into the atmospheric tank and reverses the process as the coolant cools and creates a vacuum in the expansion tank. The two-way flow also occurs if the car is just standing and ambient temperatures rise and fall.
If the system is working correctly, then the expansion tank should be completely full when cold. If the coolant just flows out of the expansion tank but doesn't return the atmospheric tank will just fill up and eventually overflow.
Hope this makes sense - took me a while to get my car sorted by fitting a new pressure cap.
I refer you to Doug's reply to your other intemperate post.
I thank you again. Greg. It was not my intention to be posting temperately.
Thanx for your assistance on th matter.
I was unaware of th advice given in a post on 'Pre-Purchase' regarding th XJS V12"1) A sense of humour, the more warped the better. 2) The ability to “speak” a NEW language, with lots of words/phrases the kids should NOT be allowed to hear. 3) The ability to consume alcohol. 4) These are VERY simple cars/engines, only made complicated by not adhering to the 3 above requirements."
i do believe i was full-filling all 3 of th first 4 suggestions. My sad attempt at humor using made up words to describe my ignorance. There was a query as to this new language, and certainly there was copious amounts of latter imbibed in. Please forgive me i can do better.
i never have found Greg's reply to my post.
I have looked. It is not important to me,
unless you or others feel i need to see it. Your time is better spent helping more needful mechanics. You sorted my issue. I am very grateful.
Gooday
All motors are lubricated and should last (hopefully) for many more years; 
