It is recommended only if your car has old rusty cooling system. As u said, the radiator is perfect, the pipes are new, coolant is being used, t valve new and ur system doesn't have rust then please dont do it.
dil to chahta hai experiment kerneka but it can cost a lot. if u feel it is getting hot u can check some:
if brakes are not jammed, i mean wheels are moving freely
check the compressor, maybe it could be making it difficult for engine
clean the tvalve it could be stuck or not opening closing properly