This may be a very stupid question, but I am curious because I pulled the supercharger outlet duct today to change the seal and there was very little coolant coming out, not like how it would gush out when you pull a coolant line. My question is, does the supercharged XJR model have a separate supercharger coolant radiator in addition to the regular radiator as what the regular XJ have. And does it have it's own coolant system that runs through the supercharger. I would like to know because it that is so then I think there is very low coolant running through that system. OR is it all the same system running from the reservoir/expansion tank?

If it's separate, How will I check it and how will I refill it? Thanks much

 

It is a separate system with its own electric pump and radiator ( sits between the engine rad and the air con rad ) but it is interconnected to the main engine cooling system.


You have to bleed both together.


Set the heater controls to HOT


Take the big 19 mm hex plug out of the top of the V8 plate, undo the header tank cap, and fill through the V8 plate until the header tank fills.


Refit the hex plug and cap and run the engine up to temperature, let the engine cool down and check the level in the header tank.
Repeat as necessary .

 

Thanks I will look into that.

I was also advised that the intercooler pump may no longer be working. Would someone please help me figure out where the intercooler pump is located and how to diagnose it's state of operation. Thanks very much

 

The intercooler pump is located on the right hand side chassis rail, roughly below the air filter box.


The pump works all the time the ignition is switched on.
Be aware that it is a magnetically driven pump, so just because you can hear/feel the motor run, it does not follow that the impellor is turning.


Check fuse 2 (15 amp) in the engine management fusebox ( the smaller of the 2 fuseboxes under the bonnet/hood )

 

If the intercooler ducts turns only slightly warm even after a long drive, would that indicate that the pump is working properly. I can set my hand on top of it and leave it there without a problem. The only hot part is the outlet duck with V8 on it. Does this test do justice of it's operating condition? Thanks