[Perfectlap]

tank gets brittle with age. Did you replace the coolant before you recently replaced the cap?

to all: If you replace the coolant without the old cap, even if if you fill under vacuum, the old cap may no longer hold enough pressure, air gets in and will result in hairline crack in the brittle tank. Eventually it will crack open completely and spill the pink kool aide..even if you replaced the cap later with the new version as the damage may already have been done at that point. I went through this myself, we were baffled as to why the coolant kept dropping, it was the old cap.