Ah great point, nearly escaped me.

Is your over temp trouble at idle or at cruise?
Unless I overlooked it, you didn't specify what temps you have.

Is it boiling over?

Have you confirmed your guages?

If it is not boiling over, then you might not actually have an over temp problem or maybe you do have over temp, but it isn't a problem per se.

We need more details please.

Welcome to the site.