mtsmiths Posted October 10, 2003 Share Posted October 10, 2003 The positive terminal of our '00 keeps oxiding up. In spite of a felt collar and dielectric grease it develops a corrosion node the size of a golf ball in about four weeks. The OEM clamp actually corroded away, and I replaced it with a lead universal clamp, cleaned everything and prepped it in mid September. Yesterday The Pretty One needed a jump after listening to the radio for 1/2 hour while parked. This was after two hours of high speed driving, so the connection was obviously bad enough to stop the juice. What's going on; in the dim recess of my aging brain I seem to remember that this is a sign of overcharging? No other symptoms. Quote Link to comment Share on other sites More sharing options...
frag Posted October 10, 2003 Share Posted October 10, 2003 What about a fine crack in the battery case letting the acid seep out?? Just a possibility. Quote Link to comment Share on other sites More sharing options...
mtsmiths Posted October 10, 2003 Author Share Posted October 10, 2003 I took the battery out and washed it, I saw no sign of cracks. The battery is less than a year old. Doesn't seem to use abnormal amounts of electrolyte either. Quote Link to comment Share on other sites More sharing options...
EOppegaard Posted October 10, 2003 Share Posted October 10, 2003 I still agree that is sounds like you have a fine crack, maybe even too small for you to detect, in the battery. In my own opnion, I would try a new battery. However one preventive measure you could try would be to purchuse some corrosion preventitive spray, also sometimes called "battery spray". It tends to work a bit better than dielectric grease. Quote Link to comment Share on other sites More sharing options...
ferret Posted October 10, 2003 Share Posted October 10, 2003 If you replaced the battery a year ago or so, I would question why? If you have access to a good / calibrated DVM, check the voltage at the battery with the engine running. IT should be 14.1 - 14.7. What you describe is often overlooked as overcharging. This was more common up thru the mid '70's when many vehicles still used a relay based regulator, but I have come across it on internally regulated alternators as Subaru uses. Just a thought. Quote Link to comment Share on other sites More sharing options...
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