TRUING VALVES AND VALVE SEATINGS.
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irlta oF the difficulties which face %.-./ the repairer of motor vehicles, whether he be owner or garage man, is that of correctly truing the valves and valve castings when these are in had condition. Iii such cases grinding is practically useless, unless accompanied by a refacing of the defective surface's. So far as the valve is concerned, if a lathe be handy the work can be done in this, but more often than not such a tool is not available, and, in any case, it is practically useless where a cylinder is concerned.
Many types of cutting tool designed to facilitate these operations, but not always with success, have been placed on the market, and we have recerffly had brought to our notice two most useful and practicable truing machines made by Mr. A. E. Menuge, of Worplesdon, Surrey. Mr. Menuge is already well known in connection with a useful and novel crankshaft truing tool, and the valve and valve seat tools embody the same quality of workmanship and material.
An idea of their appearance can be gained by referring to the illustrations Careful. attention has been paid to the question of lubrication. The cutter employed for the valve seater does not require this attention, but where a valve is being dealt with, some form of lubrication is most essential, and, to provide this, there is a neat sight-feed lubricator fitted at the top of the valve truing tool and provided with a spring-held valve which can be released when required to allow sufficient lubricant to escape.
Special guide bushes are provided for the valve stem, whilst the valve-seating tool has a tapered bearing to fit into the valve cap orifice, and removable -stems to suit the guides for valves with stems of different diameters.
It is stated that eight valves and seatings can easily be repaired with these tools in one and a half hours, and the price of the complete outfit is £5.