C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
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Old Mar 15, 2006 | 07:51 PM
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Default overflow hose

Does anyone know what type or size is the hose from an alum. radiator to the overflow tank? 69 small block. I do not remember ever seeing heater hose that small. Thanks
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Old Mar 16, 2006 | 12:03 AM
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I think its a 3/8" ID rubber hose, doesn't have to be pressure hose
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Old Mar 16, 2006 | 05:59 PM
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Originally Posted by SIXFOOTER
I think its a 3/8" ID rubber hose, doesn't have to be pressure hose
Can someone explain why it does not have to be pressure hose. It is connected directly from the radiator to the overflow tank. There are no caps or valves inbetween. Seems to me this hose will have any and all pressure that the system has on it.
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Old Mar 16, 2006 | 08:31 PM
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Regular rubber fuel hose will handle cooling system pressure. If in doubt use fuel injection hose.
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Old Mar 17, 2006 | 05:11 PM
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Default Hose

Thanks all. Am driving over to Ecklers in the morming to pick up a couple of things. Will ask there what might be available also. If it is just fuel hose will get it from the parts store.
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Old Mar 17, 2006 | 05:47 PM
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it doesn't need to be a pressure hose because the only pressure is bleed pressure after the radiator cap, just over flow. Unless it is a presurised resevoiur and the cap is on the overflow tank. Either way, fuel hose will work, the pressure on the cap is only about 7psi I think
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