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I know this thread is a little old, but I recently formed an opinion of whether or not to go with the all-metal radiators.
In a word, do (i.e. go all metal). The stock ones have plastic tops and bottoms.. which means two more gaskets to get old, stiff, brittle and to have go and fail on you under pressure. Since the metal is crimped onto those end plastic caps, the design relies on the gaskets staying soft and pliable to hold pressure and they cannot be replaced.
I know the OE design works, and seems to be functioning OK in my car too, but heck, why would I ever want to include two nonmaintainable gaskets in the cooling system if I didn't have to?
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