Yes, monitor all the temps through the OBD port with a wireless device. Oil, Coolant, and Boost psi. Just did another block test and it passed

 

What kind of oil temperatures do you see when your coolant temperature is 210F and your tank spews coolant?

 

Around the same temp

 

Could a bad car battery cause the issue ?

 

Regarding oil temperature, assuming your engine is fully up to temperature your oil temperature should read at least 30F higher than coolant, and if you are pushing hard the difference could be higher than that. Below is picture of my temperature monitor showing over 40F difference.
I can't see how a bad battery could cause the problem you described. Do have a copy of the Service Manual for your car? Did you follow the procedure for refilling the cooling system?



Engine coolant is lower left, engine idling after run

 

Sweet little gauge install right there!
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Thanks for all the help. Pulled cylinder 4 spark plug out and found rust at the tip. Planning to pull bank 2 cylinder head off.

 

pressurize it overnight stick a camera in the holes see if there’s coolant in there.

if it is, buy yourself some time and run it with the cap loose, 5l head job is a mission from hell and needs a full machine shop on hand