Hello, regarding internal engine coolant leaks, such as with a head gasket failure, the most evident thing that is helpful for me -- not scientific at all, but something that makes total sense is to check the coolant reservoir (cold) for how it smells. It should smell like coolant and only coolant. If it smells like exhaust at all, you likely have an internal engine coolant leak. This is because exhaust gases put pressure into the cooling system due to the internal engine breach, and exhaust gases are pretty easy to notice smell-wise.
"The water jug was boiling" -- if you have a proper 50/50 coolant to water mix, you should never have "boiling" -- it's another clue that there could be exhaust gas back pressure in the cooling system.
Erratic overheating is also a clue -- along with the two other symptoms mentioned. But it's really hard to say, and all those "clues" do not guarantee that is what is happening.
Have you ensured the cooling fan is functioning as designed? You mention it does not run hot when it's idling, so that leads me to believe the cooling fan is a non-issue.
Incidentally, that can be another clue of an internal engine coolant leak...
When you say "water pump is cleaned", what does that mean? It is rare for a water pump to "fail" - the impeller could separate but that's super rare and would result in consistent overheating, not intermittent overheating.
Good luck!
Okay so when it ran hot all you smell is coolant. Now when it runs cold it does not smell anything. It’s like the truck runs fine for so long and then it runs hot. It only boils when it runs hot. Like the water jug is about to explode type boiling. Like it seems like it almost melts the water jug but there is a leak when that does happen. When it gets hot it leaks by the water jug but it doesn’t look like it over flows. And when it say it is clean I mean that my dad had took out the water pump looked at it cleaned it with whatever and put it back. Now I had to bypass my heater hose because that did bust and I didn’t wanna buy another one because I would have to get into the engine. And when my dad bypassed it, it doesn’t leak there at all. I just don’t want it to not be those things and I spent all that money on a new radiator and hose and that still isn’t the problem. I even changed the thermostat and it doesn’t leak there neither. It’s almost like imma have to fix the radiator and hose and drive it til it gets hot, if it does, just to find out where the leak is if there is one. I have AAA so I can get towed within 200 miles but I want to see the problem before I pay for a new radiator or hose and flush it.