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Old 02-11-2013, 04:29 PM
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Please help!

What is this pipe it leads to the cab, something to do with heater. Could this leak Coolant
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Old 02-11-2013, 04:33 PM
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Please help!

That looks like where the heater hose hooks to the engine. On the other end is there a rubber hose that runs to the firewall? If so that can definitely leak and looks like it's been leaking.


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Old 02-11-2013, 04:43 PM
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Just a rubber seal?
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Old 02-11-2013, 04:51 PM
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O-ring seal. However i think the tube assy is steel, it may be corroded. Whats the condition of your coolant.
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Old 02-11-2013, 04:54 PM
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On the ground unfortunately lol
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Old 02-11-2013, 05:23 PM
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Just a good reason to flush and fill with diesel rated ELC like Zerex HD. Might as well install a coolant filter too.

Last edited by michaelaiman; 02-11-2013 at 05:30 PM.
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Old 02-11-2013, 06:33 PM
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Please help!

^^^^^x2


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Old 02-16-2013, 08:13 AM
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What would zerex hd do.
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Old 02-16-2013, 08:47 AM
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Zerex HD is specially formulated for diesel engines, not all antifreeze is the same.
Diesels need certain additives that gasers do not need. So be shure the coolant ur useing is the right one for diesels.
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Old 02-17-2013, 07:39 AM
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For example... Friend of a friend was running regular green coolant in his 7.3, and it ended up eating a hole in one of the cylinder walls. I wish I could find the write up I read at one point, but basically, due to the nature of the beast, microscopic air bubbles are formed during operation and the engine, and believe it or not, these microscopic air bubbles eat metal over time. Diesel coolant has additives to combat this. Anybody correct me if I'm wrong or point to where I read this if you know what I'm talking about.
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