6.4 Coolant leak help - Ford Powerstroke Diesel Forum
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Old 01-13-2014, 05:56 AM
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6.4 Coolant leak help

I have a 08 f450 6.4L im fighting with on a coolant leak. visually inspecting the coolant leak with the system pressurized it appears to be coming from the lower radiator hose at the engine and something slightly above the water inlet.

my question is what could be leaking above the hose inlet? anyone else had this problem

any help would be appreciated.
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Old 01-13-2014, 07:36 AM
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There is technically two lower radiator hoses...the upper one sounds like where your issue lies and unless it's been replaced, more than likely that's the cause. The old style have a single internal o-ring because these hoses are a "quick connect" style design and the newer updated ones that came out have a double o-ring. I ran into his issue with mine as well not too long ago. But, shortly after, a new leak showed up and turned out my radiator was leaking as well which didn't show up with my initial pressure test because of the faulty radiator hose....I would replace the hose, and then quickly do another pressure test to make sure the radiator isn't leaking as well. Both the upper section of the lower radiator hose assembly and the radiators on these trucks are notorious for leaking. Radiators due to their design of using plastic tanks on the radiators.
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Old 01-13-2014, 07:56 AM
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I'm going to replace the lower radiator hose with both updated hoses. however it still appears there is a leak further up than the hose just not sure what could be leaking
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Old 01-13-2014, 11:53 AM
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What's done to the truck? May need to replace the thermostat housing gasket too. Depending on mileage, wouldn't hurt to get the t-stat kit and replace them.
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Old 01-13-2014, 02:22 PM
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I would do both upper and lower updated radiator hoses and as suggested above also do the t-stats while your there. Also radiator could be leaking. Thats very common.
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Old 08-21-2014, 03:21 PM
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Quote:
Originally Posted by 04hdfatboy View Post
I would do both upper and lower updated radiator hoses and as suggested above also do the t-stats while your there. Also radiator could be leaking. Thats very common.
Have the same issue...any suggestions on the best parts source to get the hoses and thermostats?
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Old 08-22-2014, 05:01 AM
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I use these guys:Ford

I pay a little for shipping but I get it quicker than Sunrise which is on the west coast.


spock91
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Old 08-22-2014, 06:35 AM
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Originally Posted by napalmer View Post
Have the same issue...any suggestions on the best parts source to get the hoses and thermostats?
Here is where I got my ford parts.

AutoNation Ford White Bear Lake | Parts & Accessories
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Old 08-22-2014, 05:46 PM
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Thanks all...good parts sources
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