How to flush out cooling system

Many radiators have a plastic petcock towards the bottom of the radiator you can use to drain the radiator. If there is no petcock, removing the lower radiator hose may be required. I have never used a heater hose flush kit but they usually go inline in one of the heater hoses. If there is not a lot of debris and buildup, you may not need to use one. I always recommend to people working on their own cars to invest in a repair manual. They are readily available at most auto parts stores and usually cost no more than $20. I picked up 2 used ones from Craigslist for my 240Z for $10!