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General 6.7 Discussion (2011-2016) General 6.7 Discussion

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post #1 of 5 Old 09-12-2019, 08:52 AM Thread Starter
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New to forum, questions?

2012 F-250, CC, 148,300 miles on it now. 4,709 engine hours, 1,217 idle hours. Def tank and tube delete. I bought it used with 133,000 on it. Changed the oil to Rotella full synthetic used OEM Motocraft oil filter and balanced and rotated the tires and almost immediately left with a 11,000# travel trailer and did 12,000 miles across the USA and back home.

I saw the “check coolant additive” warning on the dash at about 9,000 into the trip, cleared it and kept trucking. Will check coolant life with the proper tool soon, coolant levels and color are good.

Trans fluid color and level is good.

Question are this, normal operating temps on flat ground towing the trailer were 200 on engine/coolant and 195 on trans. Saw as high as 247 on engine/coolant and 215 on trans, going up a long, steep hill with the cruise on. As far as I know all radiators and coolers are stock. Are these numbers normal?

My thoughts are to flush and replace both the coolant and trans fluid ASAP just to KNOW what I have in there and when it was replaced.

Also plan to replace fuel filter today as I’ve put 15,300 on it since I bought it and haven’t changed the fuel filter.

I’ve owned the 7.3 and the 6.0 with about 300,000 miles combined for both trucks so I know a little about Ford Diesels, but this is my first 6.7. LOVING it so far. Truck is a beast. I averaged 11.1 mpg for the 12,000 mile trip. Almost 8,000 of that 12k was towing the travel trailer that weighs 11.5k. And I hauled it, did not baby this truck.

Thanks for looking, thanks for advice! Thanks for having me.

Scott
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post #2 of 5 Old 09-12-2019, 12:40 PM
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I see nothing wrong with anything you posted. Those temps are not out of line from many people's reports. As long as the EOT/ECT drop when on a downhill side of flats area you are good to go. Do what you already have planned for maintenance. You didn't mention a fuel additive to help with the ULSD lubrication. While not a 100% solution it's cheap insurance even with 148k on the clock.



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post #3 of 5 Old 09-12-2019, 12:55 PM Thread Starter
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ULSD lubrication? Guessing because you mentioned it, it must be important. Please explain.
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post #4 of 5 Old 09-12-2019, 01:01 PM
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Use some Howe’s or Stanadyne or other big name diesel fuel additive. You want something that will replace the lubricity that was lost with the reduction of sulfur in diesel. It will help protect your high pressure fuel pump.

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post #5 of 5 Old 09-12-2019, 01:04 PM
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Ultra-Low Sulfur Diesel has been known to not have the lubrication properties as in the past diesel fuel formulas. The current production fuel systems can be sensitive IF poor quality fuel is used, has entrained water, or has algae forming from standing too long. Using a fuel additive has been known to help with most of these "issues". While it's not a 100% solution it helps to use it especially since you described a wide ranging trip around the states. Another tip is using know good stations that tend to have a lot of traffic at the diesel pump.
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