Question about 2000 Jaguar S-Type

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Why does my 2003 jaguar s type keeps overheating after I replaced the thermostat. I took i to the dealer and they told me everything checked out ok but told me to replace thermostat.

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These cars are terrible for holding air pockets once the cooling system has been drained.
Run the heater on max and let the car cool, top off the coolant, and repeat the process several times. Also make sure the electric fan assy is functioning. There is a module on the side of the fan assy which occasionally fails. if the fan is working then you probably have air pockets in the cooling system.

Posted on Oct 07, 2010

  • sean ellis Sep 21, 2013

    You have a bleeder port with a flat head slot on the top thermostat hose, its plastic so be careful. this should be topped off first hand, then the expansion tank secondly....note:: very important that you have the correct thermostat. the ones from autozone & pepboys are incorrect. you must go online and order a thermostat for jag s type, it is very differ from the others and a opening temp at 188 degress, while the others are at 192 degress, which will cause your fans to run extremely high..ocne i did this my fans hardly come on and my cool stays cool



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Taking a shot at this, I'd replace the thermostat. If it is partially open at idle it would allow enough coolant to pass through, but at higher revs, that slight allowance may not be enough to keep the engine cool.
It's inexpensive and easy enough to replace.
I hope this helps... Good luck!

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