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6.0L Power Stroke Engine and Drivetrain Discussion of the 6.0L Power Stroke diesel engine and drivetrain in the 2003-Up Super Duties and Excursions. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 6.0L Power Stroke engine.

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Old 12-05-2011, 05:19 PM   #1 (permalink)
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oil cooler getting clogged?

Just got my scan gauge 2 and went for a ride. My oet and ect are around 5 to 6 degrees in difference. Does it look like im in for a new oil cooler soon? i also still have to flush the gold coolant. When I do do the flush and put in the elc could this lower the degrees difference?
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Old 12-05-2011, 05:21 PM   #2 (permalink)
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Those numbers are fine, 10*-15* is usually considered the max for the split. When you flush your coolant system however it may stir up extra junk and end up clogging your cooler.
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Old 12-05-2011, 09:55 PM   #3 (permalink)
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Your deltas are fine get a coolant filter on ASAP to start filtering the system to remove the casting sand 1/2 of the problem with oil coolers get 5-7000 miles on it then do a coolant flush http://www.dieselsite.com/2003-20076...waterpump.aspx as stated an oil cooler can always get plugged by a flush but if you remove the casting sand the chances go down.
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Old 12-05-2011, 09:56 PM   #4 (permalink)
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Your numbers look good. I dont think new coolant would necessarily change your temps, enough to notice anyways. But like TD said, monitor your temps closely after your do your flush. Usually if something was going to clog up it would do so in the first couple of weeks.

Your numbers looks good for now, keep us posted after your flush. Make sure you check and top off your degas bottle for a few weeks after the flush as well.

Get yourself a coolant filter too. Cheap and will save you a lot of $$$$ in the long run. I have the sinister kit from XDP, looks good and comes with ball valves.
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Old 12-06-2011, 12:09 PM   #5 (permalink)
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The recommendations I've been reading would suggest you should do a water-only flush and switch to ELC, your cooler is good and they're worried about clogging it.

If you did clog it, you could try the backflush routine to recover it. It seems that you would be a good candidate for this to work if your flush is what caused your clog, since it hasn't sat there and cooked in for miles and years.

I started with a high delta 45 so I had nothing to lose by trying the backflush, and I got the delta down to 15. And I'm pretty sure mine HAD been that way for a long time. So if your truck was mine I'd do the chemical flushes and backflush and see what that did, but I'm wary of suggesting it for you. I'd at least suggest you read the threads about it, search for JFirstFord.

I worry about the guys who just flush out the Ford coolant with water. They are still going to have the crap in there, that they were afraid of getting in their oil cooler, and I think it's just going to happen over time anyway and they're still going to get clogged oil coolers even with the ELC. I say go ahead and get it clean, and if it clogs the cooler, change it. Now you have a clean system and coolant that won't make it worse, add a filter, you should not have a clogging oil cooler problem any longer.
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Old 12-06-2011, 12:38 PM   #6 (permalink)
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i got my scangauge2 several weeks back, installed it and took it for a drive. noticed that my ect was too low so installed a thermostat this weekend and after driving a while, my deltas were about a 10-12* difference. i installed a sinister coolant filtration 1k ago and have about 35k on my gold coolant. its about time to flush and switch to elc. what do you recommend doing. i would like a better delta than that so i dnt think water will unclog it. should i do the restore and restore+ flush?
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Old 12-06-2011, 12:55 PM   #7 (permalink)
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Originally Posted by Joe_r_dog View Post
i got my scangauge2 several weeks back, installed it and took it for a drive. noticed that my ect was too low so installed a thermostat this weekend and after driving a while, my deltas were about a 10-12* difference. i installed a sinister coolant filtration 1k ago and have about 35k on my gold coolant. its about time to flush and switch to elc. what do you recommend doing. i would like a better delta than that so i dnt think water will unclog it. should i do the restore and restore+ flush?
Yes its time for a flush. But i would just use distilled water because there's a good chance the restore will plug it up. I've had the same delta's as you for over the last 2 years and they havnt gotten worse, i only flush with distilled water. If or when my delta's get worse only then with i do a complete flush before i replace my oil cooler. But who knows you might get lucky with a complete flush and they might get better...its a risk you must be willing to take
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Old 12-06-2011, 02:44 PM   #8 (permalink)
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Restore will break down any gelling of the coolant. Restore + is where you maybe asking for problems since from what I understand it will break away rust particles from inside the engine block cooling system and thus possibly clog your oil cooler.

I flushed my system at 67K and used 3/4 gallon Restore and a total of 36 gallons of distilled water. Everything is fine. I have a nominal 6 - 8 delta.

Get the coolant filter on ASAP. You'll also remove a lot of casting sand during the flush process. Especially if you remove the lower radiator hose. At least I did.

Good luck.
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Old 12-06-2011, 08:23 PM   #9 (permalink)
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ABSOLUTELY! Band Member is spot on. If you don't have a temperature problem, don't create one by breaking all that crap loose that is happily affixed to the walls of the cooling system. Use the Restore to remove/break down any silicate gel and do a distilled water flush.
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Old 12-06-2011, 10:45 PM   #10 (permalink)
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so, does anybody have a procedure on how to backflush? so is 10-12* bad? if i can unclog it some, i wont do the restore+, just restore. if it doesnt change the delta, i might backflush it, if somebody can inform about how to..
thanks
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Old 12-06-2011, 10:49 PM   #11 (permalink)
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Originally Posted by htown guy View Post
Just got my scan gauge 2 and went for a ride. My oet and ect are around 5 to 6 degrees in difference. Does it look like im in for a new oil cooler soon? i also still have to flush the gold coolant. When I do do the flush and put in the elc could this lower the degrees difference?
When I read posts like this and there is no explanation about how the test was done, I am always leery of giving my opinion on whether your cooler is ok or not. What were the circumstances during which you monitored the EOT/ECT delta? The EOT needs to be at least 195 degrees for the test to be valid. Secondly, driving down a typical road at typical speeds is not the way to test it. That will tell you nothing useful (unless the delta is bad under those circumstances). You need to put it under a load, such as a WOT run or with a trailer behind it.

IF you tested correctly and your delta is 5-6 degrees, your cooler is doing just fine.
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