[russ1]

Hello

Am having a strage problem with my range over heating

If you leave it ilding its fine, drive it around normaly its fine, if you floor it somthines its fine but most of the time the gauge heads to the red.

If you back off / pull over and let it idle / turn the heater on to hot and the blowers on full, it pulls the temp back down to normal.

I have tried a few things:-

Checked for water leaks, none
checked theres the correct amont of water, fine
checked for oil water mix etc, fine
left the cap off the header tank to check for exhaust bubbles, nothing
Flushed the water system
changed the thermostat

Am also going to make sure the rads got nothing blocking the fins so it has the correct air flow

Any body have any other ideas?

Another strange thing if you turn the car off ( with temp at normal ) lock it and leave it for 5mins the air con fans turn on and stay on for a age ( is this normal?)

Can anyone point to any other problems / things to check?

Thanks

Russ

 

[Cornishman]

Almost certaintly a blocked radiator, rumour has it the rad was never big enough so the cooling was always marginal at best.
A lot of us here have changed our rads just to be safe. :thumb:

 

[Stephen J]

I´d go with Cornish, never hurts to check anyway.

 

[canucker]

I just finished with several overheating issues in my 4.0 that resulted in a blown head gasket, the main culprit being the radiator it was about 60% blocked and needed replaced. After i replaced it it was good for a few weeks then started heating up, turned out there was air in the system so you could check that as well. Run it for a while then feel the rad for cold spots if you find them replace the rad.