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it's been a while, but i think i went to a local parts store and just bought a cheap hose the same size, ripped the spring out and put it in mine. i have the reproduction hoses though, so wanted to keep those.



Exactly what I did. My car ran cool in traffic, but I could watch the temp rapidly climb on the highway. Friend suggested that the lower hose was collapsing at speed and to install a spring in the lower hose. Robbed one from a parts store hose, installed it, and the problem went away immediately.