How long to wait before removing intake manifold?

[92j3ieje8]

Does anyone know how long to wait before removing top of engine; intake manifold?

 

[92j3ieje8]

For it won't burst fluids.

 

[Mustang5L5]

Until it cools, but typically I would drain the coolant first to lessen how much coolant I spill out that gets into areas I don't want it to go.