2011 6.7L Coolant Disappearing? - Ford Powerstroke Diesel Forum

6.7 Motor Problems 6.7 Motor Problems

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post #1 of 21 Old 11-20-2013, 01:54 PM Thread Starter
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2011 6.7L Coolant Disappearing?

Hey y'all, still learning about the 6.7. Had the coolant additive light come on (I know no biggie) so I check the coolant level. I notice it's quite low (took aprox a gal to fill). So I talk to the dealership and bring it in. They do a pressure test for 2hrs truck holds pressure no leaks. So I'm curious where did the coolant go? Truck is 2011 F350 with 75k on the clock.


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post #2 of 21 Old 11-20-2013, 02:28 PM
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While traveling we had a coolant leak also. Dealership found a "o" ring leaking from a fitting on top, towards the back of the engine. I believe it was part of the egr or turbo cooling system. My 2 cents, hope it helps. They had to use a probe camera to locate it. Under a lot of crap.

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post #3 of 21 Old 11-20-2013, 04:09 PM
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which cooling system was low? Engine or auxillary? I would look very closely at the radiator tank seam on the left side of the truck.
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post #4 of 21 Old 11-20-2013, 07:33 PM Thread Starter
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I've heard of radiators leaking on the driver side and also a coolant connector on the turbo. Both leaks should be noticeable correct? Dealer seems to think there's no issue because they had the truck 2 days and couldn't find anything. It was the engine cooling system bottle on driver side that was low.


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Autometer Ultra Lite II fuel pres, and pyro gauges
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post #5 of 21 Old 12-10-2013, 09:13 AM
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Same thing here on both of mine, I get little puddles under the drivers side front corner. I'm not sweating it right now, just keeping it full.
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post #6 of 21 Old 12-25-2013, 06:26 PM
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I've got the same issue but no puddles no visible leaks anywhere and also dealer looked it over and everything checked out perfect so I'm curious as to if anyone has any ideas either


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post #7 of 21 Old 12-28-2013, 01:36 PM
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Originally Posted by skinnysfd View Post
I've got the same issue but no puddles no visible leaks anywhere and also dealer looked it over and everything checked out perfect so I'm curious as to if anyone has any ideas either


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Hope to hear follow up on this one.
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post #8 of 21 Old 01-05-2014, 09:07 AM
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I was loosing coolant myself. Turned out to be a bad air-to-water intercooler. Replaced and no problems.


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post #9 of 21 Old 01-07-2014, 07:20 PM
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I was loosing coolant myself. Turned out to be a bad air-to-water intercooler. Replaced and no problems.


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Maybe a dumb question but is that the same thing as the charge air cooler or cac??? I'm thinking I'm gonna change mine because still can't find the issue??


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post #10 of 21 Old 01-09-2014, 06:18 AM
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Maybe a dumb question but is that the same thing as the charge air cooler or cac??? I'm thinking I'm gonna change mine because still can't find the issue??


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Yes they are one in the same. I swapped mine and have had zero issues since. Also keep in mind that the "radiator" that processes the coolant for your intercooler (charge air cooler) uses the same coolant and core as your transmission cooler. My symptoms were sluggish throttle response, blown intake tubes, and high trans temps. I was loosing coolant, but we couldn't find where. There was a pinhole in the intercooler and the coolant was coming from there.


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