What Causes a Blown Cylinder Head Gasket?

[OEmilio]

Causes of a blown cylinder head gasket: 1. The engine frequently operates under overload conditions, causing prolonged detonation combustion. The excessively high local pressure and temperature within the cylinder can easily blow the cylinder head gasket; 2. When tightening the cylinder head bolts, failure to follow the specified procedures results in uneven torque distribution among the bolts, preventing the cylinder head gasket from lying flat between the cylinder block and cylinder head mating surfaces; 3. Overly advanced ignition timing leads to detonation combustion during engine operation. The cylinder head gasket is a sealing component located between the top surface of the engine block and the bottom surface of the cylinder head. Its functions are to maintain gas-tight cylinder sealing, prevent leakage of coolant and engine oil flowing from the block to the cylinder head. The cylinder head gasket withstands the pressure from tightening the cylinder head bolts while enduring the high temperature and pressure of combustion gases inside the cylinder, as well as corrosion from engine oil and coolant.