Compression Ignition Addict
Join Date: Jun 2011
Location: Colorado Springs
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Sorry to say, but you have some work in front of you if your ECT is that high. I am assuming that was unloaded and at moderate temperatures.
I am running ECT of 192-194 when unloaded at highway speeds at 40 deg air temp. When I tow my 5th wheel at 60 - 65 in the summer I will see temperatures around 220 ECT when climbing hills, but the fan will jump up and the temps fall back to 210.
Keep reading up on coolant types, flushing your system, etc.... Once you start flushing you will likely trash your oil cooler (ifi it isn't already). What is your ECT/EOT delta?
2005 F-250 6.0L, crew cab, long bed 4x4
completed in 2011: STC update, new IPR, BPD EGR cooler, oil cooler rebuild, 6.4 banjo bolts, blue spring update, SCT X3, Insight CTS, 58V FICM, CCV Mod, DIY coolant filter (now gone)
, refinished turbo
2012: ARP headstuds, OEM gaskets, standpipes and dummy plugs
2015: XDP coolant filter