Where is the 17-year-old Golden Cup Sea Lion air conditioning filter?

There is no filter element in the heater, but there is a small water tank which is connected with the circulating water channel of the engine block. Sea lion car has two heaters, one next to the driver's right foot and the other under a passenger seat at the back. If you want to remove the heaters, you must first remove the inlet and outlet pipes of the heaters, and then remove the fixing screws. The front one is a little more troublesome, ...