Join Date: Jan 2010
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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.