I Think I Unclogged My Oil Cooler - Ford Powerstroke Diesel Forum
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Old 08-07-2012, 08:18 PM
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I Think I Unclogged My Oil Cooler

Well, on a haul from Michigan to Arizona, my EOTs started climbing whilst towing a 6000 lb trailer through Colorado. I'm in an apartment until I close on a house in Az, so I couldn't tear the f***er apart and just replace it. EOTs were climbing all the way up past 250* in the Az heat just cruising empty at 70mph. My parents live a few hours away, so I headed up there for a weekend to do a radiator flush.

I did the usual flush with RESTORE only (local big rig place didn't have Plus), but pulled the t-stats (good thing too because the little rubber pieces were torn) and used a small electric pump to back flush through the system. I put it all back together, and it made no difference. If anything, the ECT/EOT difference was worse.

Not having any more time to dick with it, I filled the system with distilled water, two bottles of Water Wetter, and a capful of RESTORE in hopes of dissolving the crap that's in there. Not sure why I even bothered with the Water Wetter. Not like it's gonna freeze any time soon around here. Luckily, my commute is only 3 miles, so it rarely had a chance to heat up the oil.

It's been like this for a few months now (still waiting to close on the house so I can have a garage to work in), and I just had a trip down the highway today. EOTs peaked at 226* with ECTs at 199 on the same road that caused the 250+ temps. Still not great, but it seems like that crap might be dissolving out of there. Probably not too practical for most people, but I thought I would share.

BTW this is a Job 1 '08 with 172000 miles if anyone cares.
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Old 08-08-2012, 01:02 AM
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gopd luck to you. that restore is good stuff. if you cant find the plus try the motorcraft vc9 iron cleaner (2 quarts). the ford parts counter should carry it. not cheap but i hear its very effective. also new tstats might have helped your cause.
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Old 08-08-2012, 04:36 PM
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Quote:
Originally Posted by Capt dong View Post
gopd luck to you. that restore is good stuff. if you cant find the plus try the motorcraft vc9 iron cleaner (2 quarts). the ford parts counter should carry it. not cheap but i hear its very effective. also new tstats might have helped your cause.
I don't think the thermostats did much. ECTs were actually higher after. I thought they should be cooler with straight water, but guess not unless they run hotter than the old ones.
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Old 08-09-2012, 05:55 AM
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Good to hear about the oil cooler. So where in AZ are you going to be living?
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Old 08-09-2012, 04:41 PM
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Maricopa. I'm in Chandler now, though.
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Old 08-09-2012, 07:12 PM
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yup my new stats ran 2-4* hotter. put my old ones back in. maybe try to break in the stats during "winter" if possible.
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Old 08-11-2012, 08:48 PM
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I am seeing a difference in EOT/ECT of 40-50 degrees and my coolant (which has less than 3K on it) is starting to turn orangeish brown. Looks like I need to try something else to stave of the bill until I can save up money.
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Old 08-12-2012, 01:05 PM
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so you did a coolant flush?
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Old 08-12-2012, 08:22 PM
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I am thinking of doing a coolant flush, even though I have the coolant filter, and doing either SeaFoam or ATF in the oil in hopes that it will break up the crud.
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Old 08-12-2012, 08:42 PM
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what did you mean when you said you had 3k on coolant?

dont think engine oil additives will remove buildup in the oil cooler passages that coolant runs through.

if i were under warranty i would take it in. if not coolant flush with restores or vc9 would be the first thing i do.
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