Pine Bluff daily graphic., 1915-05-16

Will slightly rotating the poPpet valves Of motor prevent the valves from improperly seating and carbon from forming on the valve seats!
 Oscillating the valves will tend to keep the seats clean and thus the valves will be found to seat more uni formly. Naturally, this will also pre- vent the accumulation of carbon in any quantity on the seats.
 My motor skips when running slowly CT pulling hard on high gear if the spark lever is advanced more than half way on the quadrant. As soon as re- tard the spark below this point the en- it ever did. Why is this? It is not tried all kinds of adjustments and have operated it under every condition.
 If the magpeto is correctly timed it Is probable that the trouble is due to weak magnets. When the spark lever is advanced all the way the spark ac- tually occurs when the armature is at the edge of the magnetic field instead of being in the position where the strength of the field is greatest. There fore if the magnets are weak the eff feet must first be felt at the weakest point in the field, and that may be ei- ther position of great advance or re- tard, depending on how the magneto is linked up. Recharging the magnets should remove the trouble.
 have a bent steering knuckle. Should this be strengthened when cold or hot?
 The knuckle should be strengthened when hot. It is better to put in new one, however, as it is difficult to straighten it so that the wheels will run true. If the bend is in the spindle there is no possibility of straightening it satisfactorily, and even if only the arm is bent it will be hard to true it up.
 Are the so called antitrust prepa.a. tions injurious to the cooling system?
 We have no reports where any of the preparations which are on the mar ket that are sold especially for auto- mobile radiators have done any harm. There are occasions, however, where boiler compounds have been used which contain corrosive substances that have acted injuriously on the ra- diator and water connections. For this reason before using any prepara- tion it should be known that 1t is in- tended particularly for radiators and nothing else.
 How far apart should the spark plug points be, using high tension mag neto?
 The usual point clearance is one thir- ty-second inch, but many find that even a smaller clearance is better. If the plug points are too far apart you will soon be aware that something is wrong. as the motor will start to miss, particularly when the car is running slowly.
 We would appreciate your telling us how to correct the oiing system in a new car which has given trouble since it left the factory. The car has been driven 5000 miles, so by this time should be thoroughly "worn in" The trouble is that oil works up into the first and fourth cylinders.
 Faulty piston rings seem to be the only condition which would give the oiling trouble you mention. It may be that the joints of the rings, which are of the ordinary eccentric type, have become aligned, leaving a passageway for the oil to enter the combustion space. Another possibility is that you have too much oil in the crank case, which causes a greater supply than necessary to be thrown up. It would seem that the best step to take would be to remove the pistons and examine the rings on the cylinders that give the trouble. The pistons can be re- moved by taking off the lower half of the crank case, removing the lower connecting rod bearing cap and with drawing piston and connecting rod as- sembly. A replacement of the rings should eliminate the difficulty. :; Can gas such as generated from car- bide be used in an auto mobile engine?
 Yes. Occasionally we hear of mo- torist driving home on acetylene gas when his supply of gasoline is exhaust ed. The objection to the use of this gas is that 1t is much more expensive than gasoline. Tie storage battery seems to charge cr my car so that it will furnish cur. rent for the lights and start the motor; then suddenly it will become dis charged. Where should look for the trouble?
 From the information you furnish it would seem that the battery is either completely discharged or you have a short circuit in the system. It would seem quite likely that it is the former, and if this is the case thorough re- charge will remedy the difficulty un. less the battery has been left in the discharged condition for too great a L.