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Ha you done what MQ MAD Had suggested and had the radiator rodded out (entails a proper clean by a specialist ,not by a hose)?

That's what I would do first.

I have problems with mine running...

Replace the thermostat with a lower temp rating
Replace radiator with a hevy duty radiator 2inch thick(50mm)triple core copper/brass or a
3inch thick aussie desert cooler quad core

Dont touch the timing if its running fine
The fan it self could be correct , but the fan clutch hub itself could be stuffed and not doin its job
Id get the fan clutch hub checked, maybe replaced...

Head gasket seems unlikely to me, unless it's burning coolant and/or there's oil in your cooling system and/or there's coolant in your oilsystem.. Head gasket's main task is, by my knowledge, to...

My first suggestion would be to check your radiator, especially seen the circumstances you're constantly driving in. Is your radiator still clean and letting through enough air?

Although a lot has...

Hi Tom,

Sounds like your cooling system is OK if it cools quickly at high revs and everything has been checked. Do you have a full shroud on your radiator that encloses...

My mate's 4.2 was over heating turnd out to be the clutch fan id cheak that ?

Hey mate, i had a lot of trouble with mine overheating mainly on hills.What i did to mine was:
Drain and flush and refill with new coolant.
Replaced the thermostat.
Replaced the fan.
But the main...

Given the driving conditions you've described & the temperatures your doing it in (with the aircon on) im not at all surprised its running a tad warm.

You may be surprised to know that the gauge...

40litres per 100klm is a lot.
Haven't got a brake dragging, you would smell it I'm sure.
Blocked air intake of filters.
How is the performance?
A coolant system flush and refill with a good...