I aren't certain on the radiator.

The header tank is a little strange to me, was up and down, did think I might have had an air lock going back a few weeks, but then the coolant level went up so thought no more of it, never thought that might have had anything to do with the extra heat

I did ponder over the manifolds, but that's kinda why i'm asking - too see if it's normal?

If you wrap exhaust manifolds does that push the heat further down the exhaust? i.e under the car ?

Cheers dojj