| 摘要 |
PROBLEM TO BE SOLVED: To provide a plug pipe attaching structure capable of improving workability, reducing a cost, and facilitating the handling of a sub-assembled cylinder head at a maintenance site.SOLUTION: A plug pipe 17 inserted at positions corresponding to each cylinder of a cylinder head 1 and defining a plug hole 5 for disposing an ignition plug 4 by the insertion is divided into an upper stage plug pipe 17A and a lower stage plug pipe 17B. A screw portion 19 of the lower stage plug pipe 17B is fastened and screwed to a screw hole 18 on the cylinder head 1 side, and during the screwing, between a bottom portion of the lower stage plug pipe 17B around the screw portion 19 and a supporting portion 11 around the screw hole 18, the gasket 12 is sandwiched and held to ensure a sealing property.SELECTED DRAWING: Figure 1 |
