PRESERVING RADIATOR COOLING EFFICIENCY.
Page 21
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How to Prevent Deposits of Lime in the Cooling Water Circulation System.
COMPARATIVELY FEW users of motor vehicles stop to think, when they are filling their radiators„ that, unless distilled water is used, deposition of lime is bound to occur in the water circulation system. This lime will adhere to the interiors of the cylinder water jackets and of the radiator tubes, and will in time cause cansiderable loss in the heat-radiating efficiency.
From tests which have been conducted it has been ascertained that if water be, heated for 30 hours to a temperature of about 190 deg. F., almost the same amount of deposit will be given as would half an hour's act-cal boiling of the water. As the cooling water temperature in. practically all motor vehicles is in the heighbourhood of 190 degrees F. it `will clearly be seen that a considerable amount of lime must be deposited in the course of a few days' running. We have only to examine the interior of a kettle to understand fully how detrimental this deposit can be.
The result of this deposit of lime is to raise the temperature of the cooling water, sometimes to a dangerous degree ; in fact, with vehicles that have been in use for some considerable time, the water often begins to boil within a few minutes of the engine commencing to run. To clean out a furred water system in the ordinary way Is very difficult, and sometimes well-nigh impossible; in fact, cases have been known where radiators have had to be scrapped and replaced merely for this reason. Particularly is this so with radiators of the honeycomb type.
A good many years ago two men, who had specialized in the chemistry of water, discovered a. simple method of preventing the deposition of scale on the plates and tubes of steam boilers. This method has now been perfected, and Boilerine tablets are the result. Boilerine has been used for some considerable time for preventing scale in all type's of boilers, and it has -proved eminently satisfactory in this respect—so much so, in fact, that it is rather surprising to find it neglected to a great extent by users of motor vehicles.
In order to clean a badly furred cooling system it is advisable to drop into the radiator 50 tablets of Boilerine per gallon of water for the first two or three treatments only. In order to enable them to perform their work, the cooling water must be kept to. a temperature of not less than 100 deg. F. After complet ing about 100 miles running, or, say, five hours' working, the scale will dissolve and the water will hold salts of lime in solution. The resulting liquid should be run off and the process repeated two or three times. With each treatment an improvement in' the heat-dissipating capacity of the radiator will be observed.
Once the fur has been removed, it is only necessary to add from one to two tablets of Beilerine per gallon of cooling water. These tablets not only prevent deposit, but also rust and corrosion, which is very noticeable when aluminium forms part of the cooling system and is in Contact with the hot water.
Boilerine tablets can be obtained front Ballerina, Ltd., 885a-897, Old Kent Road, London, S.E. 15, at the price of 56s. per 1,000 tablets.