Show CLEANING SPARK PLUGS Insulation Should Not Be Overloaded By Motorists There is 15 a curious belief which is very widely current In regard to cleaning sparking plugs when they have hao become fouled One Ona often sees the most minute care being exercised to carefully brighten the he metal of the points while at the same Ime time ime the condition of the Insulating sur surface surface surface face between the central electrode and the shell of the plug is ignored As a matter of fact the presence of soot or carbon on the points is 15 of no account whatever unless there be enough to form forma a conducting bridge between the live and ana the he the electrode The matter that really demands attention is whether there theres the surfaces of is s a layer of carbon on the he insulation over which the current can find a path and along which it can short circuit It is the insulation that needs Meds deeming cleaning rather than the points and the plug lug may have to be taken apart to al alow allow low ow this to be properly done |