Anti freeze and corrosion

[Tim Falce]

I was watching a program about classic car restoration the other day and it said that when you store your car for the winter, you shouldn't leave any antifreeze in the cooling system if you have any aluminium parts in the engine as this will cause corrosion. I would assume this meant corrosion of the ally parts not steel.
If this is so, how do we stop corrosion of the ferrous parts, my car has an aluminium head and rad and a cast iron block but is particularly prone to rusting of the head studs which pass through the waterways of the block.

[petteriu]

This sounds strange if it's actually true. I've thought that preventing corrosion (alloy or steel) is one of the two things antifreeze is used in first place.

Petteri

[graham bahr]

err i think they got that the wrong way round anti freeze also contains a corrosion inhibitor, if you do drain an engine of coolant you actually want to get every last drop out so its bone dry

[COLIN STUBBS]

not all anti freeze will protect your components from damage. some of the cheapy stuff dont even protect very well against frost!! if you add a bit of something like Fleetguard DCA65L corrosion inhibitor you should be safe. it seems to be something only commercial/agricultural engine people use. dont know if they still do,but cummins used to want dca testing on routine services at one time.certainly stops that white dusty corrosion setting into alloy hose connections.