wich coolant?

[Bean]

when I replaced my rad I also changed the hoses as there was a lot of sediments in there too - the other coolant you used might have dislodge some of the sediments. I found it easiest to flush my system by taking the thermostat out and fitting the pressure washer to the hose and the other hose out the bottom...
don't forget to flush your new rad backwards too, as you don't want to jam all that sludge into the waterways inside.

as for coolant I used to use the toyota red coolant as this is was the manual reccomends. have little to no use for it now (it's never freezing here) so only have a little left in there.