2000 Jaguar S Type overheating

sounds like pump but may have air lock as you had the hose issue bleed the cooling system as per the workshop manual and see if that helps as a first step

the 2000 s type 4.0 has a return flo head cooler line under the intake that is not visible. this line is attached to the back of the thermostat and runs to the back of the head and a small leak is hard to detect. if you are adding coolant periodically then I would have this checked. if not, then I would replace the thermostat.

Check the cooling fan, maybe is not turning on

For car running hot and overheating issues, I suggest to you go through this help links.

Click this link below and go through the troubleshooting procedure to take care of the problems: ----

Car runs hot?

http://howtobyme.blogspot.com/2011/11/car-runs-hot-in-traffic.html
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All types of car overheating problems and troubleshooting?

http://technoanswers.blogspot.com/2011/11/all-types-of-car-overheating-problems.html
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Car freeze overnight and started overheating while driving?

http://technoanswers.blogspot.com/2012/01/car-freeze-overnight-and-started.html

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Engine Overheats and heater blowing cold?

http://howtobyme.blogspot.com/2011/11/engine-overheats-and-heater-blowing.html

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Car overheats and Air blows hot at idle?
http://howtobyme.blogspot.com/2011/11/car-overheats-and-air-blows-hot-at-idle.html
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overheating?

http://schematicsdiagram.blogspot.com/2011/12/buick-century-overheating.html
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Car engine Overheats and transmission starts slipping?

http://schematicsdiagram.blogspot.com/2011/12/car-engine-overheats-and-transmission.html
----------This details will help.Thanks.

this sounds like you need to put more coolent in the car if the needles moving back and forth on turns maby its low on fluid. after changing the water pump you could have a air bubble in the system that has worked its way out and now needs more fluid. i hope this helps

Sounds like there could be an air pocket in your cooling system. If the job was done by a mechanic take it back. If a "friend" helped you, tell him to rebleed the system. Also seems like your water pump might be bad. If it was overheating before changing the thermostat and is still doing the problem only worse then I would assume the pump needs to be changed. If the pump is bad, there is no doubt that air is in the system still and causing the overheating to occur even faster.

I hate to tell you this but it sounds like a blown head gasket.

low coolant level, defective cooling fan or fan control (overheats at idle), plugged radiator, stuck thermstat (overheats all the time)

Had the exact problem. Turned out that it was the thermostat that needed replacing, relatively cheap and quick by mobile mechanic. Things were fine for a year and the second time it happened I assumed it was the same problem. However, this time the thermostat was fine, wasn't sticking, and I had a slow leak in radiator, losing colant and causing engine to overheat, which paradoxically had stopped the heater working as well. Had to get new hose also by local mobile mechanic and everything seems okay again except for the intermittent "stuck in park" problem that a lot of people are also experiencing.

change thermostat and temprature sensor on radiator