Antifreeze leak

[ExFlyBoy]

Just got her home, took me 3 hours and 200 miles and change. Along the way I noticed temp starting to climb, luckily the fan kicked in, but seemed to kick on a lot more frequently the longer I drove. So I cranked the heat and continued on..... when I got home after she cooled down I checked the coolant level and noticed it was really low, I also noticed under passenger floor coolant was dripping, looking inside cab there was coolant on the floor....it appears it's coming from what I'm guessing is the heater core.
Been looking for any related threads, but couldn't find any. Any advice on where to start would be appreciated.


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[Carrera911]

Not much else to do other than dig in and see if it's the core itself or just a loose hose clamp or rotten hose. If you need to use the truck in the meantime you can always loop the lines in the engine bay and bypass the heater core all together.


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[ExFlyBoy]

Thanks, hopefully just a hose....,


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[AAVP7]

I had the same problem on my HMMWV. First, it seemed to be a hose clamp on the heater water valve, but no matter how I tightened that, it continued to drip. Turned out to be bad corrosion on the heater valve itself. The corrosion had eaten very tiny holes into the underside of the valve, so those were almost invisible. But if you have fluid in the passenger compartment, the heater core would be the prime suspect.

 

[ExFlyBoy]

Thanks, hopefully just a hose....,


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Well tore into it today, heater core has a few holes in it..... bypassed it for now. Now on the hunt for a new one..... not easy to find.....


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[papakb]

Same as the core in the M151.

 

[dmetalmiki]

Or, get it re-cored, any radiator shop would do that if it needs be.