The gasket between the cylinder head and the main engine block is considered one of the most crucial components of any car. It ensures a tight seal, preventing the leakage of technical fluids and the entry of gases into unwanted areas. Thanks to this part, oil and coolant do not mix, and the compression in the cylinders remains at the necessary level for stable engine operation.
If the gasket is damaged, it can lead to serious consequences. First of all, the driver may notice white smoke coming from the exhaust pipe, often indicating coolant entering the combustion chambers. Another warning sign is a change in the consistency of the oil—it becomes foamy due to mixing with antifreeze. Sometimes, the coolant level drops sharply without any visible signs of leakage.
Other signs of a malfunction include engine overheating, cylinder misfires, loss of power, and unusual noises. There may also be fluctuations in pressure within the cooling system. Ignoring these symptoms is not advisable, as continuing to drive with a damaged gasket can lead to irreversible engine failure.
Repairing a cylinder head gasket is a complex and costly procedure. In Spain, the price of the part itself usually ranges from €40 to €100, depending on the make and model of the car. However, the main expense comes from labor costs and additional work such as engine disassembly and reassembly, checking for warping, and replacing related components. In some cases, the total amount can reach €2,000, especially if additional damage is discovered.
The decision on whether the repair is worthwhile depends on the overall condition of the vehicle. If the car is relatively new and does not have other serious faults, replacing the gasket can restore the engine’s previous performance. However, for older vehicles with multiple issues, the repair costs may be comparable to buying another vehicle.
After replacing the gasket, new issues may sometimes arise. Oil or coolant leaks are possible if the part is installed incorrectly or if there is a loss of sealing. There are also cases of lost compression, overheating due to a faulty thermostat, and unstable engine operation resulting from assembly errors. Unusual noises under the hood may also indicate improper installation of the part.
It is difficult to predict how long a damaged gasket will last—sometimes a car can drive only a few kilometers, while in other cases, hundreds. However, experts advise against continuing to drive if signs of malfunction are detected, in order to avoid more serious and costly engine damage.
