Why would my Top Radiator Hose collapse? - Chevelle Tech
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Heating & Cooling Heating, cooling and air conditioning

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Old Oct 19th, 11, 10:36 PM
Ki_Power Ki_Power is offline
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Liam
 
Join Date: Sep 2011
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Default Why would my Top Radiator Hose collapse?

Why would my Top Radiator Hose collapse? Like sucking through a straw with the end closed.

My fluid level is good and my thermostat is good. No overheating issues.

Do I need to bleed the system, or what?

350 V8 / 5.7 litre
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Old Oct 19th, 11, 11:17 PM
grandpas69 grandpas69 is offline
Brian
 
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Default Re: Why would my Top Radiator Hose collapse?

Try changing your radiator cap. This happened to me before and changing the cap did the trick.
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Old Oct 19th, 11, 11:47 PM
fleming23 fleming23 is offline
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Eric
 
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Default Re: Why would my Top Radiator Hose collapse?

I went through a couple radiator caps before I got mine to stop collapsing. I ended up getting a Stant cap from Rock Auto that seems to have done the trick. Mine would only collapse after I turned the car off though, not while running as the water pump is pushing on the top hose and pulling on the lower hose.
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Old Oct 20th, 11, 1:20 PM
Randy 67EC Randy 67EC is offline
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Default Re: Why would my Top Radiator Hose collapse?

If the hose collaspes after it is shut off (and cools), then the return valve in the cap is plugged, not allowing coolant (or air if no overflow bottle) to return to the radiator. New cap should fix it. Also, if you use any radiator sealer, it can block the cap return. On two different cars I had to flush the cooling system out to remove the sealer, otherwise I was having to replace the caps every couple weeks.
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