Temperature is low?

[NickP_S2]

I recently fitted a new thermostat and ever since the running temperature rarely reaches the 80-90 degree mark. It only seems to get there when I am stationary for a while and then the fan cuts in as expected.

Anyone have any suggestions why this could be? When I refilled the coolant I followed the instructions in the bible to the letter. Could I have a dodgy water pump?

[tvrgit]

Does the new thermostat have a relief valve? If so, did you put the thermostat in with the little valve to the top? I've always been advised to do this - it does make a difference on some engines but I'm not sure about the Ford V6. If the valve isn't at the top it can open too early and release hot water from the block - not much but enough to affect the operating temperature by a few degrees.

[NickP_S2]

I am not sure which way I put the thermostat in but the temperature reading is generally well below 90 degrees most of the time. Much more than a few degrees.

[spivvy]

since i replaced the radiator the temperature rarely gets above 75 except in traffic ,
surely this is not a problem?

[F908 TIM]

It might be if you wanted a heater that worked!
Mine has to be over the 90 mark before its worth turning on.

[spivvy]

suprsingly the heater works quite well except you can't turn it off as the wire to the slider is broken

[Roy_S2]

I think that 80-90 is about right for winter temperatures. Sounds to me like your cooling system is working as it should!

Roy.

[F908 TIM]

Agree with Roy, mine is taking noticably longer to get up to temperature and generally running 10 degrees cooler than in the summer. Leave well alone.