Hi Guys,
Do you know if anyone has ever fitted a “condencer pusher fan” in front of the condencer to assist the ac ?
Will appreciate any comments…
It’s common practice, my W201 Mercedes has it from the factory.
But if your viscous fan, e-fan and flaps are in good shape the system is more than adequate.
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Hi,
I do agree with you however my issue is that my AC on the XJS just does not get the crisp cold air as on my XJ12 (both 1988) with the exact same system and I was thinking that perhaps it is because on the XJ12 with it having a much larger radiator grill it gets more air going through the condencer. I guess my only worry is that if I fit a pusher fan in front of the condencer that it might restrict airflow to the radiator and effect the overall cooling of the engine. On the engine side I have the normal visco as well as a very powerful electric fan instead of the antiquated four blade standard issue fan. Any comments will be appreciated…
I fitted a late model 4.0 condensor to my 87. It’s the much more efficient parallel flow type used on newer cars, rather than tube and fin type. All it took was unbolting the bottom legs, and fabricating a couple of brackets for the bottom to fit in the stock lower bushings. I also had to have a compressor to condensor hose made up because the 4.0 fitting is different. I did that when i converted from R12 to R134a. The other fitting on the condensor fit without modification. I also fitted a Sanden compressor, but that’s really not the big difference; I did that mainly for the smaller size and weight. I get lots of cold air with the stock fan setup, even with a black car in the deep south of Alabama.
Then most probably your problem is not airflow but something else.
Hi Jon,
Would you perhaps know realistically what temperature the cabin should come down too with the AC on ? as I would like to get my XJS working like any other car…
Regards
I never measured temps, but it can freeze you out. You must ensure that the entire system is good, check for proper operation of the pressures in the system, ensure the heater valve is fully closing, and all of the flaps are actuating properly. I also changed the center vent to the late style for better air distribution and blocked off the outlets going thru the console to the back seat area.
I have had a/c specialists measure temp at outlet vent on full cold looking for about 40 degrees. Not sure that is written anywhere, but i know that is what he said he wanted to see. Of course the cabin itself won’t get there, especially when the system is operating in Auto
Hi Jon/Guys,
Thanks for the feedback, where I am at the moment.
- I have removed the heater matrix (bypassed the heater valve) for better air flow into the cabin (heater not really necessary in South Africa).
- I have changed the plastic center vent on the dash to the later type for better air flow in the directions of the front seats.
- Fitted a new Fen Air Sanden compressor and drier unit.
- I fitted an R134 expansion valve around 10 years ago when I went from R12 to R134.
As I said earlier I could not say that the air is crisp cold so my next move in the new year is to -
- Ensure there is no dust build up on the evaporator if I can get access through the glove box.
- Replace the expansion valve and condencer with a newer style aluminium type.
Keep you posted, once again all comments welcome.
Regards
I have not read the entire thread, but in converting to R34 a parallel flow condenser is necessary for the system to work properly.
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I fitted jaguar cabin filters after I took my evaporator out and saw the crap that had blocked up the evap. and drain holes.
Hi Rex,
Brave man…did you strip the dash and center consol to get the evaporator out ?
Where and how did you mount the filters Rex?
Very interesting.
Photos by any chance?
Major job
I’ll sort a picture out. They fit under the wiper scuttle one each side. They are getting scarce and old now, and facelift
lift and pre have differant part no.
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Everything out of the cabin and wiring disconnected.
Hi Guys,
I have decided to replace my AC condenser as part of the AC upgrade, what I have been offered by my trusted air con guy here in SA is a serpentine type as opposed to a parallel flow type which we cannot find in the right size. Do you think that it would be “splitting hairs” to insist on a parallel flow type or should I be flexible on the issue ?
Get one of these:
https://www.ebay.com/itm/305341477606?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=Df4xabXWSc6&sssrc=4429486&ssuid=Z_B_yX6WRIS&var=&widget_ver=artemis&media=COPY
The legs on the bottom unbolt. I made a simple bracket for each side out of aluminum angle stock with a bolt on the bottom to fit into each of the stock rubber mount cushions. The bracket bolts on where ther bottom legs bolted on. The top mounts match your stock car mounting points.
You also have to change the hose fitting from the compressor to condensor on the condensor end of the hose to a different type to match the new condensor. The fitting on the other end of the condensor remains as-is. Easy for any A/C shop to do.
The condensor referenced above is for a 94 XJS with the 6 cylinder engine. I used it on my '87 V12 XJS.
Here’s another thread on using the 4.0 condenser on the earlier V12s.
https://forums.jag-lovers.com/t/upgrading-to-later-style-parallel-flow-a-c-condenser/374795