A New Method of Repairing Scored Cylinders
Page 45
If you've noticed an error in this article please click here to report it so we can fix it.
An Interesting New Barimar Process that Obviates the Necessity of Reboring Scored Cylinders
VARIOUS methods of locating gudgeon pins have been adopted with satisfactory results by different manufacturers. Nevertheless, cases still occur when, due either -to wear or to carelessness in fitting, the pins become free to damage the cylinder walls.
The damage usually consists of two parallel scores, one at each side of the cylinder wall. If not rectified in the early stages, the bore becomes grooved to the full width of the gudgeon pin, causing an increase in oil consumption and a serious loss of power. All the symptoms of badly worn cylinders will, in fact, be present.
Until recently, the only remedy has been to rebore all the cylinders, despite the fact that only one might be affected. In the case of a deep score it has been necessary to enlarge the
bores considerably and, in so the walls may become dangerously thin. Ainew patented metallurgical process has been developed by Barimar, Ltd., 14-18, Lamb's Conduit Street. London, W.C.1, to overcome this difficulty, and scores in individual cylinders can be repaired without enlarg
ing the bore. The use of cylinder liners does not present difficulties, and scores in liners can be filled in with equal success by the new process.
The cost of repairing a scored cylinder is quite low and, if necessary, the work can be completed within a day, the repair being covered by the usual Barimar guarantee. A further application of this process is the filling in of blow-holes and other defects in castings that would otherwise have to be scrapped. After machining operations have commenced a local defect is sometimes discovered, and frequently it is possible to save valuable components from the scrap heap by means of this new process.