Compression Ignition Addict
Join Date: Jun 2011
Location: Colorado Springs
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If you have a bad head gasket, the primary symptom is overpressurizing the coolant system and puking coolant from the degas bottle. The cyclinder pressure is way higher then the cooling system pressure, so you will not loose coolant to the cylinder (or exhaust) with a bad head gasket.
If you are seeing white smoke (it sounds like you are) that is indicative of a blown EGR cooler. To be sure, smell the exhaust, should be sweet coolant smell. That is not to say you don't also have bad head gaskets. One check is to hook up a pressure gauge to the degas bottle and drive it hard. I have seen videos of a blown EGR cooler raising the pressure continuously and steadily while blown head gaskets will spike up more quickly.
Once again if you are seeing white smoke and loosing coolant, it is alomst certainly a blown EGR cooler. The main cause of blown EGR cooler is a clogged up oil cooler, so you need to fix that also. Do you monitor your ECT/EOT delta? Need to do that...
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
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2012: ARP headstuds, OEM gaskets, standpipes and dummy plugs
2015: XDP coolant filter