Hello Rog,

For the header tank the old one had the feed from the turbo at the top of the tank so when it was running you could see the water flowing back in. The 4 WD version, the turbo pipe hose size is physically bigger, the stub end at the tank was larger so i had to buy a different pipe to fit, i think it was from MSD. Also the stub end on the tank is lower down so you cant see the water flowing as its below the MAX level mark.
I hope that makes sense.
So for the fans - The fusebox is in good condition and the fans spin freely by hand. I'll put a 12v feed to the and see what happens.
Thanks for the tip, ill try tomorrow.