However, the reason I'm tackling the water pump next - is because when I drained the system earlier to do the HCV, The return pipe to the water tank wasnt flowing nicely - it was literally dripping through...

If you look at the rad from the front - the lower pipe on the left is never as hot as the top on the right (however it is MUCH warmer now I've replaced the HCV)


HeadGasket - the car isn't losing water or anything either :S