OCR Text |
Show Old Horn and Rod Make Useful Knock Detector Knocks are often very difficult to locate In an automobile engine. Various Va-rious devices have been used to locate lo-cate the trouble, but as good a one as is to be had can be made in a few minutes from an old horn and a rod. All the horn but the bell and diaphragm dia-phragm should be removed. A screw should be placed through the diaphragm dia-phragm and screwed into the end of the rod. When the other end of the rod is placed against the engine the knock can be heard very plainly in the bell. By removing the rod to differeni points on the cylinder block or crank-case crank-case the exact location of the trouble can be discovered. |