What Causes Cylinder Head Gasket Failure?
1 Answers
Causes of cylinder head gasket failure: 1. During cylinder head installation, the bolts were not tightened in the required sequence or with insufficient torque, leading to gasket failure during engine operation; 2. Cylinder head deformation or excessive variation in cylinder liner protrusion height above the engine block surface, resulting in incomplete sealing of some cylinders during installation; 3. Deformation of the cylinder gasket or uneven/notched surfaces at the cylinder liner flange. Methods to prevent cylinder head gasket failure: 1. Strictly inspect the flatness of both mating surfaces (cylinder head and engine block) before installation; 2. Verify that the protrusion height of all cylinder liners above the engine block surface is adequate and uniform; 3. Follow specified tightening sequences and achieve required torque values during installation; 4. After replacing with a new gasket, recheck and retighten all cylinder head bolts/nuts according to specified sequence and torque after 10-15 hours of engine operation.