Well I got my XJL half winterised today. Car is up on jack stands and wheels off. Ran fuel system cleaner through on a 250mile trip from Ottawa to home ( 28.4mpg at average speed of 75.8 mph ) Filled with 94gas and stabilised fuel. Oil changed.
Program to come: go through cooling system including aluminum pipes for engine and Bosch pump for supercharger cooler, brakes service with brake fluid change, transmission fluid change with new pan/filter. I am also having the wheels straightened and refinished.

I removed the left wheel liner and disconnected two items the wiring harness and the power cable for the engine coolant heater, see pictures.

I also discovered that my car is a so called dual fuel engine---see pics. So far I only have used 93 or 94 gas.

Harness connector was a bit sticky. Power cord was easy-just slide up. This a northern car feature

Definitely a Jaguar thing.

More evidence Jaguar are serious about this

 

BTK44, I think you are getting the plastic coolant lines and the aluminum ones confused. The plastic lines suffer from heat cycles. The aluminum ones should outlast the car.

 

Dual-fuel is pretty rare, it's a shame that it's up north where E85 is almost non-existent.

 

Yes it's called Flex-Fuel and I don't understand why Jaguar offered this on the 5.0L NA but not on any of the 5.0L SC models?
With FI and DI Alcohol is tailor made for those two things!
.
.
.

 

But my car has a 470bhp 5.0L SC engine.

 

Your right! You have the unicorn. They did make them for the SC XJ but not the XJR.
Thanks for correcting me. So Jaguar did have the setup for the SC 5.0L engine.

I would still be interested in converting my XJR to flex-fuel too.
.
.
.

 

Bottom of pump

power supply with MB connector

This is where you disconnect the headlamp washers water supply before dropping the bumper cover.

I finished the installation of my new Bosch supercharger cooling pump following the instruction of those who went before. ( Bigg Will, clubairth1, etc.) Pictures above along with one showing the water hose connector for the headlamp washers, located just below and inboard of the rear end of the passenger headlamp.
Next I have to remove the radiator cooling fan so I can clean all the crap out of the radiators and then on to the water pump and other cooling system fun.

 

I have completed a shortened winter program. I found out that my car had the new latest water pump and new front and rear pipes installed when the supercharger was off the car for a new torsion damper----this work was all done at a Jaguar dealer and they fitted a new snout on the supercharger. Anyway after carefully checking I decided not to upgrade to aluminum pipes at the front and rear of the cooling system this winter. The cooling system pressure tested OK. I also decide to run my car with a 110kpa pressure cap on the cooling system.

I am now halfway through the big test--my wife and I drove 3368kms in 2 1/2 days from Toronto to Canmore, Alberta-- our average speed was 105kph and fuel consumption was 8.6l/100km. All this translates to 2093 miles, 65mph and 32.6mpg All according to the Jaguar trip computer. In addition the oil level gauge still shows full and coolant tank is still on the max level line. The car ran consistently with cooling water temperature of 190F-194F at speed and 200F-204F in traffic and stop go driving. Engine oil temperature ran between 228F-238fF.
Other things of note---we found another 2017 or later Jaguar XJL 3.0 in Grand Forks ND and travelled in convoy from there to Devil Lake ND -- I picked up 2 rock chips in Saskatchewan and I lost all the sound from every system after playing music from the so called CD changer for 4 or 5 hours--next morning all the sounds were back to normal.