> Aluminum is a better heat conductor then copper, which is why it makes a
> better radiator.
Actually copper is a better heat conductor. Aluminum is stronger and easier
to form than copper so the tubes in an aluminum radiator can be made thinner
than copper and hence heat transfer across the tube is better in the thinner
Al tube. It also makes the radiator much lighter. Water cooled copper has
an incredibly high melting point, I forget what it is exactly but it very
high.
MikeC
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