MOTOR NOISES.

Northern Advocate, 17 September 1927, Page 15

MOTOR NOISES.

“CRIES OF DISTRESS.”, Noise coming from any part of the car is a source of great irritation to the owner-driver. But car noises, as the “Daily Mail” reminds us, play a very useful part in the diagnosis of trouble. A study of the various mechanical cries for help is a helpful aid to the beginner. Unusual noise may be taken in most eases as -a warning and the beginning of trouble. Here are some common cries of tress:A dull and continuous thud from under the bonnet probably denotes that a sparking plug is misfiring. The noise is rather like the muffled tap of a hammer. A noise like champagne corks being drawn in the neighbourhood of the carburettor suggests the jet 4s becoming choked. Sudden and rapid acceleration may clear it, but failing this the jet will have to be dismantled. A popping noise may also indicate that the petrol supply is coming to an end, Arter a few “pops” there is a sighing noise and then silence. Brakes shriek when they are in trouble. Usually this means that the fabric linings have become smooth and dry. An injection of paraffin will cure the trouble. Brakes that require relining also shriek. When the fan drive requires oil it makes a pitiful noise. It is such a high-pitched and persistent note that it can be traced at once. Spring shackles that require oil twitter like canaries; the dynamo when in the same predicament grunts. A loo.se dashboard makes a drumming noise. Nearly all modern engines “pink” v/hen the ignition is too far advanced. “Pinking” is like the noise made by tapping a teacup with a spoon. Some engines pink too easily. A mixture of benzole and petrol suits this kirfd of engine best.