[marco454v8]

Hi guys,
I'm still doing my initial running in at the moment. I went for a short (15 mile) drive earlier this evening, temp steady at about 80degC- got stuck in traffic for about 10 mins, and temp rose to 120! I have twin fans behind the rad, dash controlled, they go on as soon as I stop moving. As it's still quite cool here at the moment, I want to make sure I don't have a problem when the air temp is 30degC
I have a bleed valve in the intake manifold, so I'm sure I don't have an airlock. My only concern is my expansion tank- it an original style FE, but without the small pipe outlet that goes back to the rad- could this make a difference?
Cheers, Mark