Author Topic: Collapsing Upper Radiator Hose...  (Read 2393 times)

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Offline BurnOut

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Collapsing Upper Radiator Hose...
« on: July 23, 2005, 02:11:18 AM »
Last week I pulled into work to pick up my paycheck, and when I came outside there was a small puddle of coolant under the truck. I popped the hood, and it was around the top of the radiator right where the upper hose attaches, so I figured I had a cracked hose. I pulled that off, and found that it was getting old, but didn't seem to be cracked. I replaced it anyway. While I had it off, I noticed that the thermostat housing was corroded pretty badly, so I pulled it off in lieu of a new one for 8 bucks. The new one, by the way, looked to me like it wouldn't flow as well, but I figured it wasn't exactly a necessity for it to flow extremely fast. While I had that off, it just made sense to replace the thermostat, so I replaced it with a... uh... 195 I think it was, the original one and the same as what I removed. Let it cure, started it, and no leaks for about a week.
Then, today, it leaked the same. Right onto the top ridge of the radiator around the upper pipe, but here's the strange thing:
I went to add a quart of oil the other day, after stopping for not fifteen minutes, and the upper radiator hose was completely collapsed on itself. I popped the cap off, and it sucked right in. I figured it was low, and topped it off. Next stop I got out and looked, and it looked fine. When I came out, it was collapsed again. I drove it again and when I stopped it was fine, and two hours later when I came back out it was collapsed, so I popped the cap again and topped it off again, and all it took was half a gatorade bottle of water. After that I went to a friends place and when I came out it was collapsed again.  WTF?

I don't know what's causing this, I'm pretty dang sure it's filled to capacity with no air bubbles. Tomorrow I'm going to get a new cap for the radiator, but I don't see what that could have to do with it. Do you guys run 16 or 13 pound caps?

Anyway, any advice is welcome...

derek
1965 Chrysler 300 Convertible - 383/727
1984 Dodge Ramcharger - 360/727/4x4
1986 Dodge Ramcharger - 360/727/4x4
1994 Dodge Intrepid - 3.3/Auto
1999 Dodge Durango - 5.9 Magnum/Auto/4x4
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Offline georgeda

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Re: Collapsing Upper Radiator Hose...
« Reply #1 on: July 23, 2005, 05:39:43 AM »
You might have a bad radiator cap.  When engine cools it might not be letting coolant return from the overflow bvottle,
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Offline Ram

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Re: Collapsing Upper Radiator Hose...
« Reply #2 on: July 23, 2005, 06:15:59 AM »
What georgeda said. If thats not it the overflow hose may be crimped or plugged or the over flow bottle is not venting properly. Should check them as well.
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Offline TheRamChargerMan

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Re: Collapsing Upper Radiator Hose...
« Reply #3 on: July 23, 2005, 11:12:37 AM »
somethign ain't letting it suck from the reservoir.  you need tofind out what it is.  hose, cap, etc.
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Offline 85diesel_rc

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Re: Collapsing Upper Radiator Hose...
« Reply #4 on: July 23, 2005, 03:40:19 PM »
I'm betting the cap will fix it. The rad cap has a pressure and vent valve and I bet the vent isn't working. My .02
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Offline KThaxton

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Re: Collapsing Upper Radiator Hose...
« Reply #5 on: July 23, 2005, 10:37:03 PM »
One more vote for the cap. Mine did that 2 years ago.
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Offline BurnOut

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Re: Collapsing Upper Radiator Hose...
« Reply #6 on: July 24, 2005, 05:30:45 PM »
Aha, wasn't the cap. Was a winter's build up in the side pipe of the overflow bottle. Nothing flowing at all, made for a mess when i pulled the hoseclamp... almost lost my eye.

thanks anyway guys,

derek
1965 Chrysler 300 Convertible - 383/727
1984 Dodge Ramcharger - 360/727/4x4
1986 Dodge Ramcharger - 360/727/4x4
1994 Dodge Intrepid - 3.3/Auto
1999 Dodge Durango - 5.9 Magnum/Auto/4x4
1999 Dodge Ram 1500 - 5.9 Magnum/Auto/4x4

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Offline offroader_dodge

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Re: Collapsing Upper Radiator Hose...
« Reply #7 on: July 25, 2005, 06:53:18 PM »
always close your eyes if you suspect something is about to explode or break off.this way you wont see it coming and wont hurt as much.or wear safety glasses,i try to keep mine on when working on my junk.
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Offline m880w200

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Re: Collapsing Upper Radiator Hose...
« Reply #8 on: July 25, 2005, 07:45:49 PM »
i try to keep mine on when working on my junk.
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