Radiaror / Engine cooling, best fan set up

[wbute]

Increasing water pressure increases the boiling point. As has been pointed out,the hotter an engine runs the more efficient it is and the less wear and sludge build up. That's why taxis do a million km without a rebuild but grandpas HZ Kingswood only did 45000km and was burning oil and was a sludged up mess under the rocker cover.
It's also why you lose the lobes off the camshaft on 308/253 from short running. Lots of cold starts.
Are the aluminium ones better or just cheaper because they are made in China? Dirt bikes use them because they are lighter. But the whole engine is alloy so no corrosion issues. Won't an alloy rad have corrosion issues like the alloy manifolds?
Coolant does funny stuff, have a look at the pin holes cavitation causes on the sleeves in a diesel motor.
The overflow catches the coolant as it expands when you turn the engine off air flow stops through the radiator. Then when it cools the coolant contracts and sucks it back into the radiator.

[damienengland]

Nice reference to Diesel engine liner cavitation WB. My favourite subject!!!! Our Cummins K50 engines at work suffered horribly from this in the early years.