overheating problems

[geoffwood]

Hi I have recently bought my second Frontera the problem I have is overheating, its a bit strange really sometimes its ok but when you start to go uphill the temp' starts to rise I have replaced the thermostat which didn't help when I pull over to let the engine cool down the center part of the rad is cold I took the rad off to replace it but when I put boiling water into it from the kettle the rad gets hot all over if any one as any idea's that would be great cheers Geoff I forgot to say the frontera is a 3.2 v6 03 model

[robbie]

Check the fan is working as it should.
Cold it should turn easy by hand.
When hot it should be very stiff or not turn by hand.

[hipo1024]

Also worth checking the water pump? If it has plastic impellers then they can break off and cause poor flow

[Big Dav]

Worth considering an air lock?
I know the 2.0 engines are horrendous to get all the bubbles out....1st and 2nd attempts.