[v8volvo]

Some of those do look a little tight but probably not enough to cause much in the way of noticeable effects. Worth getting them into spec though and it might help a bit. Sometimes starting can improve too. With the valves the looser end of the spec is better than the tight end since the clearances grow smaller with time and miles (though slowly).

They give a warm spec and a cold spec but can be a good idea to check when cold since then the temperature is uniform. If you check on a warm engine, the first valves you measure will be at one temperature, then by the time you check the last ones, the engine temperature could change. More so if you get interrupted during the work, or spend some time fighting a stuck shim, etc. Those measurements won't cause any harm regardless but all else equal a cold engine may give slightly more consistent readings.

With these engines having a tall aluminum head with the cam mounted at the very top, I think the reason for clearance increasing on the warm engine is because the aluminum expands more than the ferrous metals used for the valves, lifters, and shims. There may be a more thorough explanation.