coolant smell through air vents

[1Bad986S]

I have the same issue in my 2000 S. The coolant level stays the same, but I get a whiff of what I believe is coolant after I park the car and get out. I have asked other people's opinion on what the smell is, and I get a different answer with every person I ask.

[suburban99]

My 97 had a similar issue. Heater core was leaking slightly. Heater cores on the Boxster do not turn off in the summer. There is no "ranco" type valve in the system, they are always cycling coolant. A small drip can cause a big smell in the cabin...they are relatively easy to change IMHO.