A 2007 Roadster would benefit from a new alloy radiator. I swapped over to alloy from the stock original plastic on my 2008 4/4... It keeps the coolant down to 85 degC with ease.

Graham

1.8 4/4 Ivory.
Toyota Yarris
Volvo V70 (D5 replaced by D4)
https://moggo-blog.blogspot.com/