sometimes it is the expansion valve which gets stuck open (so i have read). i had a similar incident, which i could not duplicate. i also actuated the purge valve quite a few times (pulled on the wire ring opening and closing the valve). i just topped off the reservoir purged the air from the system and it has been fine for the past 3k. i also closely monitor the engine temp and constantly looked in the rearview mirror for the next couple of weeks for the tell tale signs of leakage.
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2005 Porsche Boxster S, 2000 Porsche Boxster 2.7L Base, 2000 Mazda Miata LS Supercharged, 2010 Toyota Tacoma TRD Off Road
Previous Vehicles: 2005 Ford Mustang GT, 1986 Alfa Romeo Spider, 1971 Alfa Romeo GTV, 1999 Ford Mustang
1977 Toyota Celica GT
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