I was convinced that the wires are just fine left in place by an engine I had to sort out a few years ago. The cases had sat for a time with rods in place after a major overhaul, and covered by a cloth. Some time later the top end was put back together and the engine reassembled to the cycle parts. This did take a period of many months, not a few days. The engine was finally started and ran very well and put into service. With very few miles on it the return oil line blew off the banjo on the bottom of the oil tank. I was tasked with trying to find out what was up. As this is the oil return system I worked backwards to the pump, finding the oil lines fairly full of very fine bits of cloth. That led to suspecting the filter has self destructed and this was the wool from the filter. The filter was clean and intact. Eventually I went fishing in the cases with a hooked wire and extracted what appeared to be the remains of a mouse nest. I cleaned the cases out and removed the timing cover clearing all the passage ways finding nothing in there and then pulled the rocker bushings. I found small bits of the fabric, that some little mouse had carefully built his home from, had worked their way in only a few miles of engine running, down the holes in the locking rocker feed bolts which had the wires in then and into the opening for the lubrication of the rockers. That was as far as it had got but amazed me how much had reached the rockers. All was cleaned and the engine has performed very well for the past few years with no other traces of mouse nest to be found.
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