Outer Limits 4x4 Board

my hilux was sittin right on the mark of going in to the red i removed the thermostat and it now sits above half can someone tell me whats goin on ?its not fully over heating just on the start of the red .weird?

have you driven threw mud lately as in a blocked radiator core ?

what condition is the rad?

whats the condition of the water in the cooling system?

is the temp gauge working properly?

does the gauge read zero when the ignition is off if no it would be a faulty gauge ,another check for the gauge is

have the ignition on and disconect the temp switch wire and earth it out ,then check to see if the gauge reads over full if yes gauge is ok if not it would be a faulty gauge

ok...this can be a few things,

blocked radiator,or core,
blown head gasket,
faulty thermostat,
faulty viscous fan,
timing too far advanced...will cause an engine to get a bit warmer than normal...firstly i would check the operation of the thermostat if thats ok ,then get a Co2 test done and that will tell you if your headgasket is gone..also it would pay to do a radiator flush and back flush the engine