High ECT/EOT delta's - Ford Powerstroke Diesel Forum
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Old 09-19-2013, 03:47 PM
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High ECT/EOT delta's

Just got done with 2nd trip with my 2005 F350 CCLB DRW 6.0 pulling a 35' 12k fifth wheel camper. As mentioned in earlier post the limp home light comes on approx. 30 miles into trip. The truck still runs fine. It does not defuel or lose any power. ECT was around 205 and EOT was around 240 at their highest points on my CTS. Temps are about 12* difference without the camper behind the truck. That tells me that the oil cooler needs replaced. My question is that I have one more trip planned with the camper this year. Will flushing the system help or possibly hurt me at this point? Will I further clog up the system if I flush now? New diesel owner here and trying to learn on the fly. I plan on putting a BPD cooler system on it this winter. Thanks for the help.

Chuck Kenny
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Old 09-19-2013, 04:11 PM
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A distilled water flush or a chemical flush?

A chemical flush COULD hurt you. Not saying it will, but some have experienced additional clogging after a chemical flush.
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Old 09-26-2013, 02:57 AM
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A chemical flush WILL clog the cooler more. The chemicals are made to break loose all the junk in the cooling system and then the oil cooler acts like a filter grabbing all that junk. Doing a water only might help, but only real way to "kinda" clear a blocked oil cooler is to back flush just the oil cooler itself or of course... Replace it
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Old 09-26-2013, 02:20 PM
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Have plans on doing the BPD system this winter. Just trying to get through this last trip. A reverse flush will not make my cooler get more clogged correct??
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Old 09-26-2013, 03:04 PM
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Wow. Im not sure Id do any flush at all. I babyed my oem cooler for a couple months as it was clogging up. How far of a trip do you have to take it on?
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Old 09-26-2013, 03:12 PM
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Its about 600 miles each way.

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Old 09-26-2013, 03:23 PM
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I don't know what to say.....35* deltas are scary for sure. If your oil cooler go's your gonna be on the side of the road waiting for a tow truck. And then the clean up job before the new oil cooler go's in will only cost you more money. This is one of those maybe if you just gotta go for it, unplug the monitor and make sure you got triple a.
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Old 09-26-2013, 03:26 PM
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Do you turn wrench's at all?
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Old 09-27-2013, 07:47 PM
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I have my own topic about new to me engine, but on my last camping trip I have seen delta exceeding 50F with no ill effect. Even my 2007 model displays wrench-shaped warning, it takes several minutes with delta well above 40 to show up.
Using my camper-special only few times a year I am not going to raise red flag about it and with no ill effects showing up, I just take it easier on next trip.
Did somebody say reverse flushing? I am all ears?
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Old 09-27-2013, 10:54 PM
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WHAT??? Your oil is 50*f higher than your coolant? Your asking for the oil cooler to rupture causing the engine oil to pump out of the oil pan and straight into the cooling system. Ask me how I know. On top of replacing the oil cooler, you will at the very least replace all rubber cooling hoses cause the oil ruins the coolant hoses. Plus a water pump cause the stock 6.0 water pump has plastic impellers that bend and warp under the added stress of the oil. And that's only if you don't starve the rod bearings, crank bearings, lifters...etc
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