I thought I was looking a yr a graph from car feedback.

On M62 the temp sensor seems to be right at the base of upper hose going to the radiator. If there's air in the system tye sensor can read high so are you sure it's completely bled?

My car with N55 regularly reports 107c=224.6 f and drops to about 94c=201.2 f under high load.

I don't recall what the normal range is but I don't see anything especially concerning from the graph.

If the AC is on the aux fan should kick on at lower temps but I think when re-reading your post you found the problem.

The clutch fan should be loose when engine is cold and stiff when it warms up. It's not pulling the amount of air though that it should.

That alone can cause the symptoms you have been describing though the aux fan should have kicked in and cooled enough to avoid a needle jump.

Stuck partially closed tstat is a very very rare condition so I would swap the clutch with an OEM part (on the board people have regularly mentioned off brand being noisy).

The wrench kit for removing the clutch fan is not ideal I has to bend a gentle "s" into it so it would catch the but heads.

There is a trick to knock lose with hammer and wrench but I busted a water pump once with that method.

When warm the clutch fan should not freewheel very long so I'm sure that clutch is shot.

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2011 E70 • N55 (me)
2012 E70 • N63 (wife)