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Come to find that unless you make sure all the air is out of the galleries of the head when you fill the engine, you are pretty much putting a cork in your coolant circulation system.


I'm pretty sure I can rule out air at this point. We've done several test runs, all with the same net result... and topped off and aggressively bleed the system between each run. Even flushed, filled, and bleed the entire system between runs with the same behavior.

now, I'm either really bad at this whole bleeding concept, or something else is afoot. and like I mentioned, this didn't start as a result of messing with the system. It started on its own after at least a month or two of solid running.

Thanks
-Rob