My newly acquired 2001 9-3 has twice done something to concern me.
After a highway drive of about a half hour, without pushing it at all (turbo needle never goes into second section), I drive at local speed for maybe ten minutes, and when I stop the car I get white steam from under the hood, and a puddle of antifreeze. The expansion tank is just about empty, but I only have to refill the tank itself before the fluid comes up to the top, and the system was pressure checked, so no bad hoses. Yesterday, when it happened again, I opened the hood in time to see that it was spraying out from under the yellow cap of the expansion tank.
I imagine that if the cap were bad, I would be seeing the problem every time the car heats up, which is not happening. Anybody with a clue ?