The reason you need to put the rotators back is that they extend the live of the valves and valve seats. There are 2 types of rotators , positive and non positive. You clean all the ones that look good (ONE PIECE) and replace the ones that come apart or are broken. To check them you need to do it when the engine is running. Before you start the engine you put a chalk mark on them. When you the engine is running, they will rotate/advance a bit at each valve movement. This action will keeps the seat clean. If you find that some are bad after the engine is reassembed, they can be replaced without taking the head off. A special valve tool and air into the cylinder is all you need to do that. Guido.
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Today's Featured Article - A Brief History of Tractors in Australia - by Bob Kavanagh. After Captain Cook's exploration of the east coast in 1770 the British Government decided to establish a penal colony in Australia. The first fleet arrived in 1788 and consisted mainly of convicts who were poorly equipped and new little of farming techniques. The colony remained far from self-supporting and it was not until the early 1800's that things started to improve. Free settlers started to arrive, they followed the explorers across the mountains and where land was suitable set up farms. T
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