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2002 5.7l. What would cause the upper radiator hose to collapse?

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When an engine is shut down, the coolant temperature begins to drop. If the vacuum valve in the radiator cap fails, the resulting vacuum in the cooling system can cause a radiator hose to collapse

Posted on Jul 31, 2015

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Posted on Jan 02, 2017

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HondaAl
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SOURCE: bottom radiator hose cold. upper radiator bulging.

The fan won't come on because the thermoswitch is in the bottom of the radiator, without coolant flow the switch never gets hot. Just because a part is new doesn't mean it is good, is the thermostat an aftermarket part ? I would take out the thermostat (leave the gasket) and see if the bottom hose gets warm. If the bottom hose does not get warm, you may have a blockage or bad water pump

Posted on Apr 18, 2009

emissionwiz
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SOURCE: how to repair the housing the upper radiator hose

it is not safe to repair this part, if it fails and you loose your coolant the engine is ruined very quickly from overheating, replace it.

Posted on Jul 25, 2009

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SOURCE: how to replace a radiator on a 2002 chevy blazer?

radiator needs no special tools wrenches and ratchet i would replace all hoses connecting to the radiator and thermostat would be a good idea to ensure no overheating

Posted on Nov 03, 2009

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SOURCE: 2002 dodge 1500 Changed radiator, thermostat, and hoses. No heat

Why was radiator replaced?Did it have heat before ? If it was plugged, the heater core may also be plugged. Try flushing it with a water hose in both directions. I dont know why the botton radiator hose would be cold, the radiator should be a uniform temp and the air coming through the radiator should be HOT, when the engine is at operating temp. What condition was the old coolant? if it was rusty, the water pump may have lower flow than normal.

Posted on Nov 19, 2009

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SOURCE: 2002 ford focus svt, overheating,

If I understand your problem correctly if sounds as if the engine mount bolts broke which allowed the engine to drop which may have kinked your radiator hose, that caused a flow problem and the engine over heated.
If this is what you are saying it is possible the inner liner of the hose ruptured and folded in causeing a restriction in the hose, this use to be fairly common with hose's in the 50's and 60's but is pretty rare these days.
You need to check the hose for soft spots, if you do not find anything there its time for some tests, the first would be to remove the thermostat and run the engine to see if you have flow in the radiator, if your radiator has a cap at the side tank run the engine with the coolant a little low, if there is flow your will be able to see the coolant coming out of the tubes inside at the top of the core. If there is no flow you need to take a better look at the hose and possible the water pump impeller.

Posted on Nov 20, 2010

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Just replaced the water pump belt on my 2001 Escape. The old one had shredded. Now the upper radiator hose collapses when the radiator revs up. What causes this? Water pump? Thermostat? Please help!


Just a worn out hose. Older vehicles used to have a spring in the hose to prevent this. That cost money though. It is normal for the water pump to pull a vacuum on the hose. Collapsing is an old hose.

Nov 05, 2016 | Cars & Trucks

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I have a 1986 Chevy Silverado with a 350 engine, why does my top radiator hose keep collapsing?


The hose collapses because there is air in the cooling system. If the system is properly full, the hose cannot collapse because water does not compress. If there is a leak in the system, you need to repair it, refill and bleed the cooling system, and ensure that the reservoir has a proper level of coolant in it. If there are no leaks in the system, then the reservoir (recovery) bottle could be low on coolant, allowing air into the system during the expansion and contraction that occurs as the coolant heats and cools. Another thing that can cause this issue is a defective/worn out radiator cap. I would recommend replacement of the cap, refill and bleed the cooling system, then top off the reservoir and then monitor for any further issues.

Jun 14, 2016 | Chevrolet Silverado 1500 Cars & Trucks

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2008 grand vitara had radoator hose collapsed


Hoses collapsed when water could not be drawn back into cooling system from over flow tank. There has to be an obstruction preventing water to flow back into radiator when car cools down.

Feb 15, 2016 | 2008 Suzuki Grand Vitara

1 Answer

What cause lower hose to collapse afer cool down


I would start by replacing the radiator cap. A bad cap can stop the flow of coolant from the coolant reservoir back into the engine when the engine cools down. This will cause a vacuum and collapse the hoses.

The other possibility is the lower hose is starting to get weak. This compounded with a radiator cap that is not functioning correctly will cause the the hose to collapse when the engine cools off.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

Sep 27, 2015 | 1991 Toyota Corolla

1 Answer

What cause lower hose to collapse after cool down


I would start by replacing the radiator cap. A bad cap can stop the flow of coolant from the coolant reservoir back into the engine when the engine cools down. This will cause a vacuum and collapse the hoses.

The other possibility is the lower hose is starting to get weak. This compounded with a radiator cap that is not functioning correctly will cause the the hose to collapse when the engine cools off.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

Sep 27, 2015 | 1991 Toyota Corolla

1 Answer

2005 Pontiac Grand Prix upper radiator hose collapses bought new one but still does it


By collapsing you mean sucking together . . If so this indicates a vacuum being generated in the radiator by the water pump especially under rpm,s. This indicates that the thermostat may not be in the right way or you have the incorrect thermostat. I know of bottom radiator hoses sucking in from blocked radiator cores ( they can come with wire coil to prevent this) but it is difficult to see how this could be the same for the top hose which in effect is a delivery hose to the radiator.

Feb 17, 2014 | Pontiac Grand Prix Cars & Trucks

1 Answer

Do the upstream hose cause heat problems in 2000 mercury sable


You talking the upper radiator hose? Rarely they do collapse,but usuall it's a bad thermostat or really dirty radiator,or the cooling fans not activating. don-ohio (:^)

Dec 25, 2012 | 2000 Mercury Sable

1 Answer

ENGINE WAS RUNNING HOT AND WHEN I CHECKED UNDER THE HOOD THE LOWER RADIATOR HOSE WAS COLAPSED


A collapsed hose will restrict (or completely block) water flow, causing a overheating condition. Before you do anything else, replace the hose. Some aftermarket hoses are available with a wound steel coil that will prevent a hose from collapsing.

Good time to replace all the hoses and thermostat. If I were you, I'd also flush the cooling system while I was at it. Probably wouldn't be a bad idea to take a look at your serpentine (or "v") belt to.

If your particular vehicle has air bleed ports, be sure to properly bleed all air from the system when refilling with coolant. Usually the bleed ports will at or near the point of attachment of both the upper and lower radiator hoses to the engine block.

Good luck!

Feb 23, 2011 | Pontiac Grand Prix Cars & Trucks

1 Answer

Ok, g35 coupe 06,52k miles Had over heating problem in april 2010,replaced thermostat, all's well. Now Jan 2011 overheating again, noticed upper & lower radiator hoses collapse, changed thermostat...


Heres a couple of things you can check. Start your car and remove the radiator cap,(before it gets hot mind you) when it reaches norm operating temp, look inside radiator to see if water is circulating. If its not moving, its a bad water pump. Also, youre hoses should never collapse, if they collapse when they get hot maybe you need new hoses? Finally, if those dont work, flush out your radiator. Open the bottom cockpit and use a garden hose and let it flush out the system while the car is running, about 10 mins should do the trick. If the radiator looks clean inside then it doesnt need flushed.

Jan 04, 2011 | 2006 Infiniti G35

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