I have overhauled my Volvo
2040, but have a problem. The heat exhanger is a cylinder filled with small tubes, off course alle open in the ends. But on the cylinders sides, there are 2 big holes on one side, and a small hole on the other, and i forgot to look how the exchanger was turned. Does the big holes turn up or down?
My guess would be, that the big holes are for cooling water
, turning down, the small hole is for air, turning down, but i would like to be sure...