P38 Cold below Stat, Hot above

Hi All,
I have tried to search for this information but no results

Temp guage as normal for my car, but after a reasonable run I noticed the bottom hose on rad leading to the thermostat cold. However top hose and top of rad very hot.


Thermostat was changes a while ago for a genuine.
Coolant clean

Can anyone advise me?

4.6 HSE Petrol Only

Fred

it could either be a faulty stat,radiatior could be partially blocked,common on these models,or water pump.

Thank's for the reply.
Thermostat was changed when I got the car and tested at the time, How can I tell if the radiator is blocked?

redrenger89 said:

Thank's for the reply.
Thermostat was changed when I got the car and tested at the time, How can I tell if the radiator is blocked?

Click to expand...

Fact that stat was changed means nothing. Wax stats always fail shut in the early days of wax stats that meant a boil over. But newer ones have a bypass system with a spring loaded valve. Sounds as though it has failed to me. Take it out and put in a pan of boiling water to see if it opens. If it does then start looking for other things. But look at stat first.

Sounds like you could have an air lock?

Thank you for your help I will have a look at the weekend