I have a 2000 jaguar 3.0 s-type.

Here's my problem, when my car reaches operating temperature, i noticed that my top radiator hose is hot but my bottom radiator hose is cold. Is this normal? If not, what could the problem be? Thanks in advance.

 

normal, most engines are hot out the top and cold back in the bottm from the radiator

 

If loosing coolant, I would search S Type forum for "Recovery Tank." My 2001 just exhibited all of symptoms below, when the tank got replaced everything now would run just normal. The cracked recovery tank is a known problem for S type.
Symptoms:
- Fan keeps running after engine turned off
- Leaks of coolant under driver side (US) wheel well or right underneath driver seat
- Check Engine light comes on occasionally
- No heat or only luke warm air from heater