RUSTY WATER-JACKETS

NZ Truth, Issue 1199, 22 November 1928, Page 21

RUSTY WATER-JACKETS

Causes of Extravagant Petrol Consumption

pAREPUL attention to the water cooling system of a motor-car r will often give surprising results from the point of view of engine efficiency and increased mileage.

MOST popular makes of small cars are cooled on .the hit-and-miss principle, which, while satisfactory, does not give the high efficiency of a scientifically designed automatic thermostat which maintains i the cooling water at a correct temperature for highest results. The trouble with non-automatically controlled cooling systems is that while they are designed to keep the water at a correct temperature when the car is new, their • cooling properties . decrease With Use. Hijsting ot the \vater jacket lining, arid the consequent formation of a coating of hard scale of poor conducting properties, prevents the cooling water from carrying away the heat 'from the scorching cylinder walls. In hot weather the .trouble becomes aggravated, and leads to "a host ot

trouble such aa loss of compression, decomposition of the oil through excessive heat, greater wear-.-.ori pistons and cylinder walls and waste of petrol. deposits naturally follow with a still further decrease m miles per gallon. ■ If the rust flakes off and clogs some of the small water passages round ihe- t cylinders more serious trouble may follow from distorted cylinders. There are several preparations for curing that trouble irl 'a car. A little Red Diamond liquid solver poured into the radiator and left for two days will loosen an amazing quantity of rust which will drain out m suspension m the cooling water. .A cleaning, every three months will amply repay every motorist for the very small trouble involved. ,

ger of corners is reduced to a mini- ' mum by the fact that the glare of one or^other of the lights rests round the bend before the car actually takes the turn. . During a demonstration for "Truth's" benefit, the lights were operated on a dark road with passing- traffic. Withj the ofC-side, or left lamp dimmed, the functions of the other, or "passfng" lamp, were conclusively established. The elongated side of the lamp. was throwing a well-defined shadow which literally "halved" the roadway, no reflector glare of any description being visible 'to impede the approaching driver within several car-lengths of the other vehicle. , Motor experts who have been favored with a- demonstration speak very favorably of the serviceability of the invention, which Robertson has already, patented m four countries.