Why is my temperature rising in my 2000 jaguar. I cheked the colant and it was full.

Thermostat could stack in close position, radiator plug up.

Your thermostat will need to be replaced. If your thermostat is opening just a couple of degrees later than it should, it will cause this problem. This is a common problem with these jags. Buy a factory unit or an aftermarket with slightly less temperature rating.

Hello,
Here a two of the most common causes for overheating;

1. Low coolant.

2. Faulty thermostat.

Make sure your coolant level is up to the FULL line on the coolant reservior, ( do not fill completely up or you cauld cause the check engine light to come.)

Check to see if the thermostat is working.

How to test the thermostat in most vehicles;
Make sure the heater is off, start the engine and let it run for 6 to 8 minutes, ( this will allow the
engine to reach, " normal operating temperature "), from the inside of the vehicle turn the heater
temperature on high and turn the fan speed on high.
1. Listen very closely for a click sound from the engine, ( most thermostats make a click when
they open )
2. Watch your temperature guage, it should begin to lower as the coolant starts to circulate.
3. Usually within a few minutes the radiator fan will kick.

I hope this helps you.
Donnie

The coolant temperature should rise until the gauge indicated roughly half. if it continues to go until it reaches the red "H" shut the vehicle off and wait for the car to cool off. The most likely cause of this is the thermostat. It is a $4-$10 part and usually is easy to change. Thanks for asking!

check the relays for your fans and check you fuses for yourfans

faulty temperature sensor locate it going into the block and replace its located on the block itself usually drivers side or in the front has 1 wire coming out from it ...as far as overheating is concerned does the fan relay kick in and possibly you need the thermostat changed or is there enough radiator coolant in the radiator .

it is on the thermostat housing or on the head itself

Check for radiator leaks, hose leaks, try to locate the area were the leak is occuring. You may need a new thermostat. If you can locate were the leak is, chances are you'll find the area in need of repair.If coolant is running from small line " hose from radiator or coolant bottle", could be a faulty thermostat.

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.

this is a old model and it should have a cold start valve or it should have a coolant temp sensor, replace the colant temp sensor which is usualy located on the thermostat housing or on the intake manifold and this will sove the clod start problema!!