How To Loosen Corroded Battery Terminals. If in case you have a top-post battery youll simply have to loosen the nuts till there isnt a stress on the clamp. Next attempt to loosen the bolt and remove the terminal for further cleaning.
To remove the old battery in our 2005 Toyota Corolla I first had to remove one small nut and loosen another on the metal arm that holds the battery in place. 5 Causes of Battery Terminal Corrosion. 2 The negative terminal was loose but the nut that lightensloosens the connection is completely frozen to the bolt the nut was actually so corroded I needed to use a different size head on the ratchet to try to turn it.
Many times the terminal is corroded so bad that it must be replaced completely.
Use a small thin screwdriver and push this between the top of the terminal and the battery holder. So I cant tighten it or loosen it properly. Corrosion on your car battery terminals can prevent your car from starting. Protect yourself and your work surface.
