2 core versus 3 core radiators

[Alitis007]

not wanting to "buy" into the above comments, but I am thinking (and am very likely wrong........ almost always am.........)

is there a different temp setting for the Petrol thermostat V's the Diesel one?

wouldn't the petrol one open quicker than the diesel one?
or
atleast regulate the water flow differently?

I'm curious.......

my TD42 is getting hot when towing my van........ so I am watching this for some insight to help me........

I just purchased thermostats for my petrol and diesel and they sold me the same one for both 4.2 engines. Haven't checked if they fit yet.

My TD42 just spent every hill from VIC to coffs sitting on 3/4 temp (bout where the fan kicks in)
And EGT's of 500/550 so I will be seriously looking into the 3 core rad next time , never got the car this hot in the Simpson and Kimberly .

I did remove and clean radiator before trip and it was covered with mud just from the 2 trips to matts so I don't see mud clogging a 3 core as any more of a problem

This is for both, what gauge are you going by the factory gauge or and aftermarket one ?? If the its in good condition have you had the radiator tanks removed and the core cleaned out internally to see if the tubes are blocked??