C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Collapsed radiator hoses

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Old Sep 22, 2006 | 10:23 PM
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Default Collapsed radiator hoses

I had my 91' (L98) A/C converted over to the newer system today. I noticed tonight that my upper and lower radiator hoses are collapsed.

Does anyone know if the A/C conversion could have caused the hoses to collapse?

Thanks!
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Old Sep 22, 2006 | 10:44 PM
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Old Sep 22, 2006 | 10:50 PM
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i've seen a number of lower hoses collapse, never an upper, its just an age/ heat thing, nothing to do with a/c....a car that runs ok under light loads but overheats if you twist it up may have a lower hose collapsing-- sitting still with the engine warmed up and revving the engine you can see it happen.
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Old Sep 22, 2006 | 10:52 PM
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Originally Posted by redrose
i've seen a number of lower hoses collapse, never an upper, its just an age/ heat thing, nothing to do with a/c....a car that runs ok under light loads but overheats if you twist it up may have a lower hose collapsing-- sitting still with the engine warmed up and revving the engine you can see it happen.

Thanks for the input, I'm going to change them out this weekend.

Vince
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Old Sep 23, 2006 | 10:56 AM
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I have a 90 convertible. My upper radiator hose also collapses when it cools. I thought it needed replaced so did so. It didn't make any difference. The new one also does it. I think it is because there is not a spring inside the hose to support it. It doesn't seem to cause any problem as it opens up when the engine is running warmed up.
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Old Sep 23, 2006 | 11:12 AM
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Check your cap and line to the coolant reservoir.
Your hose's are collapsing because the cap or the line will not allow any/enough coolant return in to the system upon cooling.
Good Luck

Last edited by C4Crazy787; Sep 23, 2006 at 11:26 AM.
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Old Sep 23, 2006 | 11:17 AM
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Originally Posted by 90convertible for me
I have a 90 convertible. My upper radiator hose also collapses when it cools. I thought it needed replaced so did so. It didn't make any difference. The new one also does it. I think it is because there is not a spring inside the hose to support it. It doesn't seem to cause any problem as it opens up when the engine is running warmed up.
My friend's did that too. Check your overflow tank to see if it's fuller when it cold.
I change his radiator cap and it corrected the problem.
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Old Sep 23, 2006 | 02:55 PM
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Originally Posted by C4Crazy787
Check your cap and line to the coolant reservoir.
Your hose's are collapsing because the cap or the line will not allow any/enough coolant return in to the system upon cooling.
Good Luck
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Old Sep 23, 2006 | 03:10 PM
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Originally Posted by Ttime
My friend's did that too. Check your overflow tank to see if it's fuller when it cold.
I change his radiator cap and it corrected the problem.

Replace your cap.
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Old Sep 23, 2006 | 07:18 PM
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Thanks to all on the radiator cap thing, I'll try that and see what happens. I couldn't find any hoses in stock in town today anyway.


Vince
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Old Sep 23, 2006 | 08:09 PM
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Also, while your in there, and depending on the age, you may want to consider doing the thermostat, just my .02$ worth
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