WHY IS IT.

Hawera Star, Volume XLVIII, 12 January 1929, Page 13

WHY IS IT.

“RUNNING HOT.” 1 Almost any week-end now, 'overheated .motor-ears are a commonplace on many highways, and yet most cars, now have engines built along new and presumably better lines’ with radiators ■of suph an increased size that the trouble should be: non-existent, states the “Lyttelton Times.” Several correspondents, seeking advice on ending engines overheating, have drawn attention to one bad feature of ear performance that, persists, despite modern advances in oiling, radiation and the standardisation of waiter pumps. A recent investigation of seven cases of overheating showed, however, that only four cars had been on the croadlonger than twelve mouths', ‘also that in each case overheating had been caused by forcing .the car to. maintain an average speed higher .than that foi which iltNjva® designed. This does not mean that a man with, say, a 1925 car make® it overheat by trying to keep up w T itli ai 1929 model, so much as that very few standard cars can bo kept for long periods operating at near their maximum speed or power. In other words, a veiy cheap car may be capable of reaching 65 aii.pdi., but it will definitely protest against being held for long distances at a speed much' above 40 ampin Other causes of overheating are many, and it is not logical to expect an engine, to continue to operate in a cool condition when, for example, its radiator and water jackets are full of scale (washing soda in boiling water provides the best cleanser), when the piston rings are badly worn, or when wear i 3 musing the overworked parts in the transmission to. waste power.

In the country a frequent sight is that of a motorist filling his radiator either with muddy water or with stagnant water from an old and raster tin.

Remember specially that dirty water clogs the radiator and causes overheating.