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e:sd1:restoration 05-08-2007 18:37 e:sd1:restoration 05-08-2007 18:38 current
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===== Big End Oiler ===== ===== Big End Oiler =====
-{{:e:sd1:big_end_oiler.jpg?200 |Original oiler}}It looks like the oiler has come partially unscrewed while the engine was running at some point, as there is a small scar on the screw-top and the mounting thread has been bent half way along. One side of the thread is compressed and there is a fracture between two threads on the other. I've tried to //persuade// it to straighten again, but the fracture will not close up again. My two options were to cut the thread down to the fracture, or to bore and tap back into the body and fit an extension thread in place of the original. Fortunately, the trimming option appears to work, as there are three threads engaging and the oiler is securely held in the big end. A little loctite will ensure it doesn't move again.+{{:e:sd1:big_end_oiler.jpg?200 |Original oiler}} I wondered why the oiler was loose when I was looking over the engine, and would not screw in very far. It looks like it has come partially unscrewed while the engine was running at some point, as there is a small scar on the screw-top and the mounting thread has been bent half way along. One side of the thread is compressed and there is a fracture between two threads on the other. I've tried to //persuade// it to straighten again, but the fracture will not close up again. My two options were to cut the thread down to the fracture, or to bore and tap back into the body and fit an extension thread in place of the original. Fortunately, the trimming option appears to work, as there are three threads engaging and the oiler is securely held in the big end. A little loctite will ensure it doesn't move again.
{{:e:sd1:big_end_oiler_trimmed.jpg?60|Trimmed down}} {{:e:sd1:big_end_oiler_trimmed.jpg?60|Trimmed down}}
 
 
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