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Brake Fluids To Not Use One of the items checked at periodic intervals by the citizen-mechanic is brake fluid. Its surveillance is an absolute must in every car preventive maintenance pro­ gram. We mention this subject because of the fact that there are still thousands of gallons of old-style brake fluid in the garages of many of America's do-it-yourselfers which should be identified and dis­ carded as soon as practicable. PAGE 17-SUPPLEMftftT TO McHENRY PLAINDEALER-FRIDAY, OCTOBER 8. 1976 The reasons for this are that most brake fluids are hygroscopic - that is, they absorb water from the air. The longer they have been in storage, the more apt they are to be contaminated with water. Water, of course, boils at a relatively low boiling point - 212 F. (100 C.) at sea level. Any severe brake applications can transfer heat from the friction surfaces of the foun­ dation brakes into the actu­ ating mechanisms and on into the fluid which will turn into a compressible gas (steam) and cause loss of brakes. Another reason is that disc - brakes transfer more heat faster into the brake fluid than the old drum and shoe brakes did, and the old-style brake fluids were not com­ pounded to withstand this high level of heat without boiling and developing com­ pressible gas in the brake " lines. Another reason is that the fluid over the years could have been contaminated with other liquids which will cause rapid deterioration of the rubber components used in hydraulic braking systems. Do not take the chance that your old supply of brake fluid is still good. Replace it with fresh brake fluid in new containers labeled as meeting the requirements of SAE J1703 (unless you are in the Arctic, in which case you will be better off with fluid meeting SAE J1702). Never use old brake fluid cans for storing anything else, nor use equipment for trans­ ferring or dispensing brake fluid that is ever used for anything else. Store your brake fluid in a dry place and NEVER punch an air hole in the container to facilitate pouring. Dirt and moisture will enter and con­ taminate the fluid. Brake fluids compounded to SAE specifications may be mixed but should not, be­ cause the boiling point of the resultant mixture may be lowered, the Automotive Parts & Accessories Associa­ tion cautions. Use only new brake fluid for cleaning brake systems and their components. Never use petroleum or water or alcohol-based products to flush a brake system. If brake fluid is spilled on a car finish, it may be flushed with water. Finally, never re-use old brake fluid from bleeding operations. It must be dis­ carded. A © Automotive Parts A Accessories Association Silence Is Golden One thing about not talk- . ing too much is that you ^ get the benefit of the *' doubt C O A S T T O C O A S T S T O R E S . total hardware Get Your Car HapMr* Try Our "PRE-WINTER SPECIAL"! ANTI FREEZE Ethylene Glycol Base '99 Gal. Limit 3 $2 Reg. 3" Prestone Anti Rust PUMP LUBRICANT Prestone RADIATOR FLUSH 3/200 Reg. P ea. MOTOR OIL Limit 12 AUTOMOTIVE THERMOSTATS $1 69 Reg. T WINDSHIELD WASHER FLUID 69* -Gal. Reg. 99* ANTI FREEZE TESTORS 69* Reg. IV BOOSTER CABLES 746-6246 Reg. r FOR THE GAS LINE! Limit 12 Reg. 38' C O A S T T O C O A S T S T O R E S ] « total hardware ,vv«vvv .W.'.'.VAV