How Do I Remove Impeller Chunks?

[MissMy70911T]

What's the technique for flushing the impeller chunks out of the cooling system on my 2001 996 C2? Do I put a hose into the filler tank and just let it run? Do I need to start from the front of the car and work back? What is the magic sequence? 

 

When I pulled the water pump on my 2001 996 C2 and noticed that a couple of the impeller vanes are chipped. I've filtered the drained coolant and haven't found the bits and pieces.  I

[JFP in PA]

They get scattered all over the cooling system.  Best way we have found to get some of them out is to flush the cooling system components backwards from the normal flow path with copious amounts of clear water.   This will still not get every last one as some of them get wedged in tight passage areas and don’t want to come out.  Whatever you do, DO NOT apply full water line pressure to the system, it is designed for less than 20 psig pressures and will not be happy if you hit it with 60-90 psig line pressure.

[MissMy70911T]

Thanks. I'll go slow.