| 摘要 |
A tool which immobilizes dual camshafts of an internal combustion engine by interfering with teeth of the gears or sprockets driving the camshafts when inserted into engagement with the teeth of both gears or sprockets. The tool comprises a generally U-shaped member, wherein the sides of the U pass into and occupy valleys of the teeth. The center of the U has reliefs exposing timing marks of the engine. The tool has optional adjustment structure for adjusting length of the sides of the U and optional second adjustment structure for variably spacing the two sides of the U apart. The former adjustment structure may comprise frictionally retained, slidably disposed members, or may comprise a clamp employing a threaded fastener. In an alternative embodiment, the tool may be formed in separable components wherein two interference members are mounted on a threaded shaft. In the alternative embodiment, one interference member has teeth on each one of two lateral sides, for engaging the teeth of the gear or sprocket, and the other interference member is essentially planar. In the alternative embodiment, the three components are clamped together by a nut tightened onto the threaded shaft after the upper and lower interference members are assembled and placed in a position interfering with rotation of the gear or sprocket.
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