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OK, got stuck today when my upper radiator hose blew. Got it fixed and decided to replace the lower also. Apparently this is the original one, all rusted and took a bit to get her off. Noticed that there was a helical wire (spring?) inside of the lower hose. What is this and should I put it in the new one? Thanks a bunch!

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D Smith
ALABAMA
1970 Chevelle 350
 

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I can't say about the high rpm operation, but hoses have had the spring inside to keep them from collapsing when they go from hot to cold and the coolant pulls a vacuum. I would keep the spring.
 

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Hey 70
Agree; keep the spring. The rad cap has a vacumn relief feature that allows air back in as the system cools. Many caps will lose this function as they age. When that happens the hoses collapse. When you replace the hoses suggest you replace the cap and belt(s) with them. It's cheap insurance. mgg

[This message has been edited by Manny Gomez (edited 11-17-99).]
 
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