Because just now the heater core gave me a subtle yet very clear hint it demanded attention/replacement too.
After pushing the gas a bit, the car suddenly heavely smelled like coolant.
The floor at the passenger side got wet and the vents began smoking a bit later.
I topped of the coolant and drove home. maybe 2km.
It felt and smelled quite hot when I opened the hood, but the gauge never went up further than normal.
So I guess no problems.
I ordered a nissens heater core and will get the 2 rubber o rings...






