- Remove the expansion tank cap.
- Instead of the expansion tank cap, install adapter MS 554-01.
- Connect the device MS 554-07 to it.
- Warm up the engine and turn it off.
- Use the pump of the device to create pressure in the cooling system.
- Bring the pressure to 0.1 bar less than the opening pressure of the safety valve in the expansion tank cap.
- Make sure that the cooling system pressure is maintained for 2 minutes.
- To reduce the pressure in the cooling system, gradually unscrew the device MS 554-07, then remove the adapter MS 554-01 and install the expansion tank cap with a new gasket.
Warning. Do not remove the expansion tank cap when the engine is hot, as escaping vapors can cause severe burns. Close the lid of the expansion tank with a thick rag and slowly unscrew the lid until steam hisses. After the steam stops coming out, slowly unscrew and remove the cap from the expansion tank.