Engine getting hot

[Rumcajs]

I see no issue with 90°C especially after you have worked it harder. Mine will climb up to 95°C when in deep sand in low range and ambient around 35°C + easily.

I see temps on mine fluctuating during summer between 87°C-92°C and in winter between 85°C -89°C subject to loads and I don't tow trailers/campers either.

It has 84°C thermostat so what do you expect?

If you want to make sure then check if the radiator fins are not blocked with foreign matter (leaves, insects etc.) by putting a source of light behind it and look from outside if you can see the light. If there is something there to impede the airflow on to fan bimetallic spring of the viscous clutch it will not engage the fan when required for example.

If the engine/cooling fan is spinning really easily (no resistance from the viscous clutch) first thing when cold and there are tell tale signs of dust trail around its clutch housing then it is also possible that silicon fluid is leaking out and there is not enough oif it in there to act as a clutch.

Another trick is to engage A/C to see if the temps are going down/stabilize (A/C condenser electric fan kicks in forcing air through radiator as well)

BTW, how do you know the temps are going up, becuase factory gauge will not move until about 100°C which is a deliberate design as to not freak out the consumers when watching temp gauge needle moving up when under heavier load.

Regards