heater core and fan replacement

I have a 92 seville; the heater core is bad, the radiator needs to get flushed, it gets to 20 below around here. The fan is noisy and slow. Need help. Would somone here refer me to the schematic for doing the work myself and suggest what I should use to clean out the radiator. Thanks in advance, mnrumpole

If you have the rad out and you want to do it yurself, lay it down flat and put the cap on. Fill it with a mixture of rad flush and very hot water.
TIME FOR A CAUTION Use rubber gloves and glasses or even better a full face shield and glasses.

Too old!!!