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Old 10-08-2012, 05:08 PM
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I believe that the theory of wire coil inserts being nessecary on the lower hose in order to prevent them being sucked flat is a bit of an "urban legend".

A properly functioning cooling system on a modern vehicle should maintain a system pressure of approximately 15 PSI ... more than enough to prevent collapse.

It's also why most replacement (molded) hoses don't have a coiled insert in them.

Radiator Hose Coils

That being said, and as already pointed out, you could always rob the coils from another hose and use them with yours.

PS:
Those "universal fit" flexible hoses incorporate an integral wire in their design in order to prevent them from kinking at the curves.

Last edited by 66GMC; 10-08-2012 at 05:16 PM. Reason: PS
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