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Old 09-20-2018, 04:04 PM   #1
Join Date: Aug 2017
Location: Mansfield, TX
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Replacing a coolant line

My Ď06 diesel pusher has developed a leak in the metal coolant line and the shop wants to replace with a hose. It is a Cummins 5.9 300 hp.
Any problems with doing this? The line has rusted through and the rig has only 45k miles on it.

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Old 09-20-2018, 05:01 PM   #2
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Should not be a problem as long as the hose is properly attached to insure there are no leaks.

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Old 09-20-2018, 05:23 PM   #3
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At first blush it seemed like a reasonable way to fix it. Obviously there was some reason a metal tube was used, but apparently they are hard to find, and there are a ton of Cummins motors out here with radiator hoses.
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Old 09-20-2018, 08:57 PM   #4
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I would replace it with a hose but would also find out why it rusted thru. If it wasn't rusted thru from the outside it is possible that the coolant needs to be replaced.
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Old 09-20-2018, 09:04 PM   #5
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It would be good to know where this metal tube runs , I know of a couple on the 5.9 engines used in Dodge trucks , if it runs under the exhaust manifold next to the block & turbo , you could use a hose ( to get you mobile ); but I wouldn't expect it to last long.
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Old 09-21-2018, 05:32 AM   #6
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Thanks for the comments. It rusted through from the outside Iím told. Not sure the path it takes because I havenít crawled up under to look but Iíll be sure to ask.
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Old 09-21-2018, 06:24 AM   #7
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Be sure they use high-temp "silicone" coolant hose https://www.goodyearrubberproducts.c...e1.Page038.asp


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