With an aftermarket gauge for coolant I can see the temp rise slowly on slight hills on highways. (which I know is normal as its under constant load)
From what I also read its not the fact it climbs but how soon the cooling system gets the temps back down to a good place is an indication of a good cooling system as any car under load (hills,towing sand etc) will rise.



This got me thinking .

Even steeper hills


What is the best way to get coolant temps controlled? Keep revving high in a lower gear when going up hill?
Or drive in a normal manner in the torque range of the gear.


I live in Sydney NSW and out Wollongong way There is MT Ousley road.
I can just imagine going up there with a TD42T