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What is Electrolysis?
As the additives in your coolant that keep it neutralized become depleted the coolant actually develops an electric charge from passing over dissimilar metals. You can even measure this voltage with a voltmeter! This small electric current removes metal from engine surfaces leaving large pits or holes and can eventually eat entirely through a component. It can also weld bolts and fittings to the engine and components.
A Digital Multimeter can be used to test for this.
1. Attach the DMM ground probe to the negative battery post.
2. Insert the tip of the positive probe into the coolant and observe the reading.
OK – less than .10 volts.
Bad – anything above .10 volts.
8)
As the additives in your coolant that keep it neutralized become depleted the coolant actually develops an electric charge from passing over dissimilar metals. You can even measure this voltage with a voltmeter! This small electric current removes metal from engine surfaces leaving large pits or holes and can eventually eat entirely through a component. It can also weld bolts and fittings to the engine and components.
A Digital Multimeter can be used to test for this.
1. Attach the DMM ground probe to the negative battery post.
2. Insert the tip of the positive probe into the coolant and observe the reading.
OK – less than .10 volts.
Bad – anything above .10 volts.
8)