the reason why battery explosions occur when starting an engine: one or more cells had a high concentration of hydrogen gas (above4.1%) because the vent cap was clogged or a defective valve did not release the gas. The electrolyte levels fell below the top of the plates due to high under hood temperatures, overcharging, or poor maintenance. a low resistive bridge or "treeing" formed between the top of the plates such that when the current started to flow, it caused an arc or spark in one of the cells. that combination of events ignites the gas blows the battery case cover off and spatters electrolyte all over the engine compartment. the larger number of battery explosions while starting an engine occurs in hot climates.Originally Posted by Bogeyman
WHEN EXPLOSION HAPPENS, thoroughly rinse the engine compartment w/ water, and then wash it w/ a solution of 1pound detergent to one gallon of warm water to neutralize the risidual battery acid. then rewash thoroughly the engine compartment. Periodic preventive maintenance will reduce possibility of battery explosions.


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