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The vacuum process for refilling is rather exacting. Which Instructions did you follow?
I ask because if for example you did not set the heater controls correctly, that may be the cause.
Also if you accidentally let the AirLift tube suck air because it emptied the coolant container.
If you did not completely drain all the coolant before pulling the vacuum.
It is a really tedious process that becomes even more tedious if you fail to follow precisely the correct set of Instructions.
One piece of advice I could not find and maybe JFP would know-
if you get the system almost full - but still have say a quart of coolant left over(- a small airlock somewhere?)
- is it wise to drive with the burp valve open , hoping this will allow the air bubble to purge itself ? Or perhaps run the engine with the rear jacked up to achieve the same objective ?
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