That fan is installed backwards. Concave side towards the motor, convex towards the radiator.Thanks guys for your response. Just checking if I have got it right, can someone have a look at the picture to see if I have correctly fitted the Plastic Fan correctly .
Earlier Volvos also had a pressurized, round, coolant expansion tank with a 5# cap. Just run it's hose to the end of the overflow tube, and instantly, you have a pressurized system. It'll mount EASY in the left side of the radiator shell. You DO need to have a LEAKPROOF cap on the radiator! Bill W.2rosella;
For maximum cooling I installed a B W pressurized radiator ( 4psi cap ) , over flow bottle ,fan shroud , engine pans ,6 blade fan. With this set up you can fill this radiator up to the bottom of the inlet nozzle ( more water in radiator than original ) Reduced my temperature 10 degrees from 195 F to 185 F when its 96 F here in Texas and I am running my AC.