OIL IN TAPPET COVER.

Horowhenua Chronicle, 4 March 1937, Page 3

OIL IN TAPPET COVER.

In many cars the valve tappets cover consists of a pressing- of steel made concave in the centre in order to stiffen the plate. Nine motorists out of ten, however, always draw the retaining nuts down too tight, so that the plate is buckled and oil is free to leak from the bottom, where the plate should make a good joint with the cylinder block. Careful tightening of the nuts so as not to buckle the plate should overcome the trouble, but if it still persists, and the papking consists of one large rectangular piece of cork, it is possible that oil collects between the cork and the plate, finding its way there via the stud holes in the cork. In order to allow the oil to drain back to the crankcase, two or three holes may be cut in the cork near the bottom, .or, better still, cut array the entire unused inside portion of the cork, leaving- only a continuous narrow strip round the edge of the plate to make the joint. The packing- should be seeur-, ed to the plate with shellac, while the tendency to allow oil to leak will be minimised if the joint between cork and cylinder block is made- with hart! grease.