The cylinder-head gasket
The OM 457 and OM 460 series of engines starting at engine number 085588 make use of modified cylinder heads.
While the previous cylinder head has an even sealing surface, the modified design features a groove milled out around the drillings for water/pressurized oil. The cylinder-head gasket was adjusted to increase its sealing capacity. The main features which distinguish cylinder head gasket are that the rubber gasket lips of the drillings for water/pressurized oil are about 3 mm higher.
Repair instructions:
The cylinder heads / cylinder-head gasket are classified based on the engine number. However, these parts in the assembly (cylinder head and gasket) are also compatible with older engines up to engine number 085588. For that reason, it is essential to keep in mind which cylinder heads should be installed in the event of a repair. Please make sure that the cylinder-head gasket / repair set always fits the cylinder head. Making a mistake here will damage the engine. Furthermore, make sure that the sealing surfaces are level in the event of a repair. It is absolutely essential to repair depressions or deformations in parts.
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