Temp drop @195°F is the KEY! Check it, happens when the T-stat opens.

 

It was not cold. Already had heat in the motor. I will go check it out today.

 

Motor cold, started, ran 20 minutes. Started at 109 and climbed to 208. Temp did not drop once it reached 195. For that matter I never seen the temp drop to indicate the thermostat opening. I think that is one problem that will need to be tackled. If I do a distilled water flush should I replace the thermostat before, after, or leave it out while flushing?

 

Replace t-stat, top off with 50/50 premixed dex-cool, bleed air, pressurize system, let cool, recheck level, then recheck operating temp.

 

How do I bleed the air?

 

Run @ idle with rad cap off and a

 

H3s do not require any special anything when filling coolant. Old School remove the lower radiator hose at the radiator to drain. Reinstall lower hose, remove cap, fill to top of radiator with 50/50 coolant/water, start truck with cap off and bring to full temp, look in radiator, add more 50/50 coolant/water if necessary to bring to full radiator, replace cap when full. Add more coolant/water if needed to the reservoir full when hot line.

Drive and re-check level in reservoir.

That funnel thing looks cool (pun) and all, but no need to send cabbage to Bezos for that.

 

Every shop I worked at had them, saves the floor from overflowing coolant while waiting for the t-stat to open. Install it & fill it, move on to the next car for repair. Send some cabbage to Bezos, or buy local for 2x+$.No Spill Coolant Filling Funnel Kit $38.99

 

If I am using concentrate, do I use distilled water to add or bottled water? Or should I just use 50/50?

 

I always use distilled water if I do the mix myself, but the pre-mixed 50/50 is a no brainer.