Method for repairing damage of a water-cooled cylinder head in 4-stroke internal combustion engines, and cylinder head

摘要

In a method of repairing damage of the water-cooled cylinder head in 4-cycle internal combustion engines in the seat ring pockets of valve seat rings (1, 2) of intake or exhaust valves connected to cooling passages, the damaged seat ring pockets are turned out and inserted into the turned seat ring pockets, respectively suitable valve seat ring (1, 2) made of a wear-resistant material used and existing cooling channels connected to be cooled valve seat rings (2). In a cylinder head, especially for 4-stroke large diesel engines, with uncooled and water-cooled valve seat rings (1, 2) of inlet and / or exhaust valves made of wear-resistant materials valve seat rings are fitted in seat ring pockets of the cylinder head and secured by shrinking. In this case, the non-cooled valve seat rings (1) are each formed as a solid ring and the cooled valve seat rings (2) each made at least two ring parts (4, 5) with a closed cooling channel formed therebetween (3) by circumferential welding of the ring parts.