the air lift works great, be sure to have newish hoses or they will crush them if they are old as it creates a huge vaccum at around 25psi and it will suck anything in quickly.
BUt that did not resolve my issue, the issue remains and this is the issue that started it all.
Last in my troubleshooting list is to delete the thermostat all together and see if that changes anything.
So far to recap,
New radiator Mishimoto,
3 water pumps all flow the same,
New VG33 heads,
Tested the cooling system psi
Tested the cooling system for exhaust fumes
Wideband installed to test for rich or lean conditions, efi and carb ran lean due to various issues over the year but it was due to the timing was set wrong, when I fixed to the correct timing, in EFI it ran extremely rich, and in carb I was able to tune it down to what it is today running decent and strong. idle and running at stoic conditions 14.7ish
I even ran some acid inside to clear up all the rust build up, that I thought worked but I guess in the winter time I didn't run it long enough.
So to this day, what would happen is I get inside I drive it around for a bit it would be ok, everything seems to be good then about an hour of driving around, hammering it hard at some places and this would take about and hour or 2 when idling it would just out of the blue gradually overheat. If I hit the top radiator hose with an IR it matches heat index on the guage. 235 F is about 2/3 of the way to H
More I let it idle, more it will over heat if I rev it up it would attempt to cool it down but after a few minutes of idle it will return to overheating slowly.
basically, it reverted back to the original problem when I first stopped and rebuild everything possible including new piston rings.
So as someone suggested, to try it with out a thermostat I am going to remove it and try it. If this doesn't work I will source out an vg33 replacement and slap the carb, cams, oil pan and pickup line (i think needs to be modified a tad) and toss it in. seems like I can pick them up for around 600 - 700 with 100k milage from a pathfinder.
-=[ Update ]=-
Here is a video of the latest overheating problem. https://youtu.be/5PAcnZsJ91o