Usage:
D353 Industrial, Marine And Vehicular Engines;
G353D Natural Gas Engines
Description of Change: A new cylinder head gasket, which has a larger fire ring, is used on the above models.
The wire used in the fire ring for the new gasket is larger in diameter than the wire in the former gasket.
Because of the larger fire ring, increased torque is necessary on the cylinder head bolts to keep the same load on the gasket body. While the load on the gasket body is the same, the load on the fire ring increases. This added load decreases the radial movement of the cylinder liner which caused erosion between the cylinder liner and the cylinder block.
Adaptable As: The new 1W6440 Cylinder Head Gasket is a direct replacement for the former 8N7264 Cylinder Head Gasket which is canceled. Two are necessary. Special Instruction, Form No. SEHS7990 has the new torques and tightening sequence for use with the new gasket. The Special Instruction comes with the new gasket.