Determination Criteria for Water Pump Coolant Leakage
WARNING: This page is about a different car, the 2020 Mazda CX-30. However, it is still accessible from the selected car via links, so may be relevant.
- If any coolant residue (green) around the steam hole can be verified but there is no large solid matter adhered to it as shown in the following illustration, the residue is caused by a small amount of steam blowing through the steam hole, not coolant leakage. Therefore, this does not indicate a problem.
- If a large amount of solid matter is adhered to the area around the steam hole or the area is wet by coolant as shown in the following illustration, a water pump seal or gasket malfunction can be considered.
Therefore, perform the coolant leakage inspection and replace the water pump or gasket. (See ENGINE COOLANT LEAKAGE INSPECTION .)