180f thermostat or inline thermostat
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which year truck do you have? Does it have a 4.0 or 4.6?
There's not one silver bullet answer to your question. With a new radiator, HD Fanc Clutch, correctly bled system and a tropical thermostat, my 04 will occasionally idle over 200, usually at first warm up before it drops to around 188-194. 03 and 04's came without an oil cooler. If you want it to run much cooler than this and without the spikes that we see with the factory design, you're going to have to do the inline mod.
There's not one silver bullet answer to your question. With a new radiator, HD Fanc Clutch, correctly bled system and a tropical thermostat, my 04 will occasionally idle over 200, usually at first warm up before it drops to around 188-194. 03 and 04's came without an oil cooler. If you want it to run much cooler than this and without the spikes that we see with the factory design, you're going to have to do the inline mod.
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