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Reply to "Radiator coolant"

Despite vacuum bleeding the system, it is not uncommon for there to be a rogue bubble, or more accurately, many very small rogue bubbles, trapped in the system.  Over time they work their way to a high spot and gather, and then are purged out of the system all together.  The length of the coolant hoses and the rollercoaster pathway certainly exaggerates the issue.

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