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Old 02-28-2013, 02:42 AM
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JCL JCL is offline
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Location: Vancouver, Canada
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JCL will become famous soon enoughJCL will become famous soon enough
It was actually caused by too many short trips, not getting it hot enough and keeping it there long enough to burn off the moisture in the crankcase. Leads to formation of condensate paste under the valve cover, which collects in the CCV, and at cold temperatures it freezes.

If it freezes shut, it blows out the easiest path, usually the valve cover gasket. In this case, it can't hydrolock. If it freezes open (less likely) it can draw in oil from the sump on over run, ingest the oil, and potentially hydrolock.
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