Cooler data

Hey, guys.
The fever curve of our baby is busy almost every time. I had a normal 95 degree for almost 10 years. No traffic jam, no summer heat could scare him.
Today, 100 degrees is normal at normal 22 degrees outside temp.
Only he jetts immediately to 110 - 115 degrees
Yeah, yeah, hundreds of times chewed through. I know...

Just my question.
Is the hose that connects the left and the right cylinder bank cold water output?
That would mean pump input leads the cooled water into the block?
Is there any data, characteristics of the cooler?
For example: idle without e-fan after about 20 to 30 minutes at 22 degrees outside temp -> water temp motor out 103 degrees. ( Should be 95 )
Cooler output ( pump input ) 88 degrees.
Measured with Digital Temp probe at the engine block next to studs and at the housing water pump Eiingang.
If these data are totally beside the shoes, I need a new cooler.
Other question: how do I know that the pump works properly?
Are there any comparative values?
That only thing I know for sure is that my ad is 100pro and that I have a new thermostat that reacts exactly the same as the old one.
Can somebody do some comparative measurements and do some posts?
Warm greetings
ruedi