Thanks for the advice. I will check that out.

it is. thanks,

I have a 2001 S80 that was overheating and loosing coolant. I found a crack in both the expansion tank and cap, so I replaced both of those. I am not loosing anymore coolant, but the car is still overheating. (It does run at normal temperature and doesn't overheat if I drive with the heater on high,...