I changed my radiator and thermostat yesterday. The thermo housing (thermo gasket) and radiator had both been leaking

Obvoiusly I drained all the coolant from the radiator, but I did not do a full flush because I haven't been having any problems with overheating. I did cyphon some of the coolant from below the thermo, but did not pull the coolant plug on the engine... not sure how much I drained, but it seemed like a couple gallons total in the bin.

Filled up the radiator with coolant today, burped the upper hose by squeezing it to make sure I was getting it as full as possible from the top. In total, I got about 2 gallons in, just under...

Went out and drove it - all seemed ok, holding steady at just above 175° F.

Then stopped at a rummage sale, got back in the car, and when I started it, the temp read close to the next mark, which is 212° I believe (halfway between 175 and 250). It dropped quicky though once the car was running (within 20 seconds)

Since that, it has been running a little warm, like halfway between the 175 and next, unlabeled mark. (running maybe around 190°?). The heater does drop the temp somewhat, but not all the way to normal.

Also, upper radiator hose seems bulgier than I remember them being in the past... but don't know if I have taken that much note before...

It feels hot to the touch. Lower one is not bulging and feels normal room/air temp (not hot or cold).

The radiator cap has not vented anything (dry where it lets out).

What would cause the temp to go up when it is not running?

And Is a bulging upper radiator hose normal?

Pic:


and on the engine side:

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