radiator and expansion tank


hi,ive just replaced my rad on a 1989 fourtrak,ive filled the rad up with an anti freeze and water mix,do i fill the expansion tank up to the full level aswell,thanks for any help.

generally i have mine a

generally i have mine a third full, that gives you spare for those air bubbles you aint beeen able to bleed out, filling it will cause it to overflow when system heats up and expands