Help with cylinder head gasket problems
| Identification feature | Reasons/Features |
| (A) The coolant level keeps dropping | Coolant enters the combustion chambers in very small quantities. This phenomenon can continue for a long time without other signs |
| (B) Significant loss of coolant. A trail of white smoke trails behind the car even when the engine is warm | A significant amount of coolant enters the combustion chamber, evaporates there and exits through the exhaust system in the form of water vapor |
| (C) Air bubbles rise from the open expansion tank; when opening the locking cap, a large amount of coolant bubbles out of the tank or radiator | The exhaust gases are squeezed into the cooling system. The filler hole smells of exhaust gases |
| (D) A rainbow-colored film on the surface of the coolant | Engine oil gets into the cooling system |
| (E) A greyish-looking emulsion settles on the removed dipstick, the engine oil is riddled with water bubbles | Coolant is leaking into the engine oil. Diagnose the damage immediately. Have the vehicle towed to a repair shop. Caution, water in the engine oil can damage the bearings |
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