Originally Posted By: 2cool
If the battery is 5 years old, you've done very well. Given the uber high temperatures in the Midwest for the last bunch of years, the phenomenon you observe is normal. The battery electrolyte is cooking out of the vents. The water will still boil at 212degF, which is well below under hood temps in the middle of summer with the A/C on. The boiling water will carry some of the sulfuric acid with it. Because it's much heavier than water, it mostly drops on the battery. Nothing to be done about it. Baking soda and water will neutralize the acid. I favor lithium grease for terminals, because lithium is a base. When you disconnect the terminals, have a memory saver that plugs onto the OBD II port. Remove the NEGATIVE FIRST. When removing the positive terminal, protect it from grounding, it it live from the memory saver. Installation is the reverse.
Lived here all my life , not noticed this before. Yeah we get hot then gets very cold.
I never used a memory saver so that is a good point, it will be live. I just changed a the batteries.
Whats a good OBD II saver? I think I can use the Sable as the power source if the cord is long enough.