Initial symptoms.
You hear water running and open the radiator cap to find that the LLC is running low or that the LLC is contaminated with engine oil and air bubbles appear.

Check the engine oil level gauge to see if it is increasing because the LLC is flowing in.

If the vehicle continues to be ridden in this condition, it will overheat in the worst case.
Cylinder head gasket loosens, causing overheating.

Repair：

Inspect the cylinder head for distortion.
If there is no distortion, replace the head gasket.

Reference information

• In Vamos-HM1,HM2, the radiator fan motor often breaks and the radiator fan stops.
  Warm up the engine sufficiently or turn on the A/C switch, and check that 2 of radiator fans are rotating – and are rotating at a sufficient speed.
• Vamos-HM1,HM2 often does not open completely even under conditions where a thermostatic valve should open.