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Old 06-26-2013, 08:08 AM
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Coolant problem

Hey guys. I'm no diesel mechanic but pretty good with the tools. I had to replace my radiator in my 08 f350. When replacing the fluids, I used a universal coolant that was sold to me through the local orileys. With no help from orileys, I decided on my own to put two gallons of concentrate with the rest in water. This morning I left out pulling a trailer with two lawn mowers and got about eight miles and it blew the bottom radiator hose off, not damaging the hose or the coupling. I'm pretty sure I checked the clamp and it was secure. I reattached the hose and filled it with water, put about twenty miles or so on it and still holding. I have a few questions in regards to this problem. If I used the wrong type of coolant or the wrong amount would it over heat and blow the hose off. And if that's the case, how much coolant and what type should I use.
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Old 06-26-2013, 10:14 AM
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In order to get a 50/50 mix of coolant and water you would need 3.5 gallons of coolant and 3.5 gallons of distilled water. I personally would use an EC-1 rated coolant like cat coolant. If you don't want to use that I would only use the ford gold or the zerex G-05 coolant.
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Old 06-26-2013, 01:10 PM
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Have you updated to the new hoses with the white plastic tip with two o-rings? Also, the coolant should not cause the hose to push off unless the degas bottle cap does not release pressure, then somewhere the pressure must be released. Typically, the hoses shouldn't pop off unless they weren't seated properly or they are defective.
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Old 06-26-2013, 01:45 PM
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I replaced with a brand new radiator. The o rings were changed but didn't see the need to change the hoses. Truck only has 67000 miles so the hoses look new. When I went back together with the project, I may have not seated the hose properly. Is there a way to test the cap or would it be wise to just replace it
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Old 06-26-2013, 01:51 PM
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Just replace the cap with an OE cap from your local ford dealer. I would look into using the ford coolant. it has a chemical that is supposed to reduce the cavitation in our cooling systems.
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Old 06-26-2013, 01:55 PM
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Also was just wondering if there is a specific way for the truck to accept the water/coolant other than fill the degas can while the truck is running. Does it need to be pressurized
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Old 06-26-2013, 02:27 PM
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Old 06-26-2013, 03:29 PM
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Add coolant to the degas bottle. Also, replace the cap with a STANT from Amazon or your local shop. About $5-$10 and cheap insurance.

There's no need to pressurize it. In fact, depending on where you look, a radiator vacuum fill is the best option. Although, there has been some notice from Ford (supposedly) that this can damage the gaskets on the thermostats and it should not be used. If in doubt, fill it while it's cold and running. Then drive it around up and down hills to angle the block to help work out the bubbles. Keep checking very often until the coolant level doesn't change at normal operating temp. This should have most of the bubbles worked out. You will still have some that will disperse over the next few miles.

Also, keep an eye out for problems with the head gaskets. This should not be your problem and don't get too paranoid like I do when someone tells me this stuff. BUT, if you have a bad degas cap and you have leaking head gaskets, blow-by will pressurize the system. I would expect that the radiator hose would leak before it would blow off in this case. You probably didn't have it seated correctly. Should snap really noticeable when connected.
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Old 06-26-2013, 04:29 PM
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Thanks. Everyone has been very helpful. Great community !!!!
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Old 06-26-2013, 05:59 PM
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I just looked at the connection on the lower radiator hose and where the notch is, it's lined up but not perfect and it moves freely left to right a bit. The clip is in the grove flush so I'm assuming that its seated pretty good. If anybody has anymore input it'll be appreciated
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