Hello all. I have a 2012 XKRS and am looking to install an electric auxillary fan. Has anyone added this to their car and can share their experience? I am having issues at idle for the car fogging up and not cooling properly in traffic. My tech says its because I upgraded the supercharger cooler (thicker) Ideas on size and wheather I should get a puller or a pusher Shrouded or just the fan. I know I may have to also upgrade the alternator (the Range Rover with the 5.0 SC engine one is larger and a direct fit apparantly)
Thanks in advamce. tete a tete
I think you’ve got something else going on. I find the ventilation perfectly fine. And what would a supercharger have to do with ventilation anyways?
Nope, not buying it.
Of course, I don’t use recirculate and I use the upper and lower vents. I do keep the side vents open but close the centre dash vents. The fan is typically set 1 notch above minimum.
It's an AC issue, nothing to do with the possibility of the condenser having less air flow also a higher output alternator's not needed either. Could be a freon leak or compressor failing or compressor valve or something else related to the climate system.
The supercharger uses an isolated cooling system, the two systems do not mix.
You MAY want to replace your supercharger cooling pump though, especially if you have a thicker intercooler. The stock pump isn't the absolutely greatest in the world.
Your Automatic Climate Control should eliminate the foggy windows. You'll have to wait for your engine to warm up before it can blow warm air out of the vents.
Hiya. Thanks for taking the time to reply. Yes. He did say it could be a failing compressor.
The reason we suspect its an airflow issue is that prior to the upper/ lower pulley tune and larger supercharger cooler all was working fine. The AC will blow cool while at cruising speed. It just blows hot at air at stopped traffic lights since the upgrade. Same with the fogging issue. Once the car is running all is good but slowed down or stopped and I'm wiping the inside of the windshield..
all suggestions welcome. we could just try process of elimination. Cheapest option would be the aux fan first then the compressor replacement.
just been searching a bit and this peaked my curiosity...
Having AC issues here in Vegas, which, become noticeable very quickly in the summer!
Car does not over heat or give me any indications that it is. The AC system blows cold at cruising speeds. AC system is charged.
When i slow down or come to a stop..or as i did this morning starting the car from cold, i get very little cooling air from the AC...68F
Every other car i have had, my current Fpace..928/944 included, as soon as you turn on the AC the cooling fans turn on..or they turn on at lower driving speeds to provide the airflow over the condenser to get rid of the heat.
I hear and see no evidence of the fans turning on at idle with the AC system on.
from the service manual..."Under hot operating conditions, the fan may continue to operate for 4 minutes after the engine has been switched of..."
Ill be messing with it today but wanted to get a head start here on any ideas.
Newer JLR vehicles command the condenser fans differently from the X150. The X150 fans are commanded by engine/coolant temp for example if I never turn the AC on and the condenser's at ambient temp, the radiator fans still turn on, with the newer vehicles, many more sensors are used such as temps, speed and head pressure among others.
Need more info from you regarding ambient temp, could also be a compressor issue or ambient temps are just too high for the climate system to compete at idle. But there will ALWAYS be a difference in idle temp versus under throttle and moving.
Suspect the OEM condenser fan. The bearings are skateboard wheel bearings (same size/type).
Early failure, the bearings still turn but don't coast or coast very little.
A/C is fine while moving.
With battery disconnected for safety, try pushing the fan by hand.
It should coast after a push.
Early failure, the motor can move the fan until the motor overheats and quits.
So, intermittent failure.
No trouble code for this failure that I am aware.
Also, not aware of a successful bearing replacement.
If anyone does, please post photos!
The only time my fans come on is at the track or under hard driving which heats up the engine. And yes, occasionally they will run for about 4 minutes with the engine switched off but on my car, the AC’s cold even if the fans never turn on, ever, and the fans turn on even if I never use the AC and the condenser’s cold. Like I said, they’re independent of each other.
Bill are you talking about the fan under the dash on the passenger side?
No, I was referring to the A/C condenser fan which is also the engine cooling (radiator) fan. It serves both purposes since condenser and radiator are in series for airflow.
The radiator fan is controlled by the engine control module (ECM). The ECM monitors both engine temperature and A/C.
"Cooling Fan Control: The ATC module determines the amount of condenser cooling required from the refrigerant pressure sensor, since there is a direct relationship between the temperature and pressure of the refrigerant. The cooling requirement is broadcast to the ECM on the medium speed CAN bus. The ECM then controls the temperature of the condenser using the cooling fan" Ref: XK Service manual page 2041.
The refrigerant effect requires a pressure differential (compressor engaged). Initial operation of the compressor will quickly raise refrigerant pressure which results in both refrigerant effect and condenser fan operation. I've not noticed compressor operation without the radiator fan. I'll check it.
My point in response to the topic (post #6) was that our 10+ year old condenser (radiator) fans tend to fail intermittently, at first.
Since the radiator fan works a bit, it appears to be functioning properly.
Slow fan = low air flow = inadequate heat rejection = poor/no a/c and eventually high engine temp.
As far as I understand the DPS valve at the aircon compressor is the usual suspect when aircon blows warm(er) while stationery or at low rpms . It is a well know issue and often reported here at the forum that the change of the valve cures the sympthoms. The related TSB from Jaguar should be this:
As far as I understand the DPS valve at the aircon compressor is the usual suspect when aircon blows warm(er) while stationery or at low rpms . It is a well know issue and often reported here at the forum that the change of the valve cures the sympthoms. The related TSB from Jaguar should be this:
Great information and an excellent reminder: Don't jump to conclusions!
Proper diagnosis before changing parts is key to success.
Download the service manual https://www.jaguarforums.com/forum/x...guides-215509/
and become familiar with the theory of operation, search the forum for related threads and keep the conversation / thread going.
Troubleshooting is fun and educational. Let us know what you find.
