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[royster]

If your thermostat was in place when it overheated, you need to replace it: my understanding is that overheating kills thermostats.

[xboxrox]

If your thermostat was in place when it overheated, you need to replace it: my understanding is that overheating kills thermostats.

Yes 2nd that royster ~ I was really anal about concern for overheating, especially after learning the 2.6L engine is prone to blowing head gaskets heads from overheating ~ my truck's cooling system history 1) added Barhs Leaks to stop vapor trail from tailpipe 2) added Barhs Leaks to stop coolant loss 3) same as #2 AND I installed Mitsubishi OEM new thermostat & new Mitsubishi OEM radiator cap, all good lately...

NOTES:
1) My trucks eng temp gauge never worked from 2011 to 2014 we just wondered why the needle always rose up to 1/4 and never changed until turning off the engine ~ THEN one day the eng temp gauge needle went up to approx 1/2 and we thought the truck was going to overheat but it did not ~ I musta bumped the sender wire while working on the distributor Yikes..! A bumb gauge reading can play havoc or at least fool you
2) I only use 50/50 premixed coolant & drain it out every year or two ~ that way the mixture stays exactly new and 50/50 as should be ~ I used to run around buying distilled water and mixing match blah blah big waste of time & money

Thats All