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Battery Overflowing/Boiling?
I have a 2003 Chevy 2500HD with the Duramax engine. One of the batteries (right side) keeps leaking acid out of the caps. I've cleaned and tightened the terminals, twice, with no change in the overflow. What should I test or look for to find and solve this problem.
Although I'm just a shade tree mechanic I've had 40+ years of repairing, rebuilding, and making my shade tree stuff work.
Any help will be appreciated, thanx
5 Answers
- ?Lv 71 decade agoFavorite Answer
Check connections on left battery may not be receiving charge or bad and overcharging right, Get both batteries load tested for bad cell, also get charging system checked for to much output.
Source(s): ASE master auto tech ret. - paul sLv 41 decade ago
Put some safety glasses on and watch the cells as the battery is charging (with the engine running). If the charging rate is adjusted correctly you'll see a bubble of hydrogen gas form in each cell about once every 20 seconds or so. If it's bubbling much more than that you could either have a charging problem (standard float charging voltage is supposed to be around 12.5-15.5 Volts D.C.) or you could have a bad cell or two. To check your battery get a load test done at your local parts house or turn the engine over on battery without starting it (with the other battery disconnected). With a multi-meter set on DC Volts your battery shouldn't drop below 9 volts when the engine is being cranked,...if it does the battery is considered bad and needs replacing.
The open circuit charging voltage or float voltage is checked with the engine running after it's had a chance to build back up the surface charge on the battery. Too high and you'll get excess gassing and you'll need to check the charging system out to see if there's an adjustment you can make to bring it down.
Source(s): The Ratelco battery charger manual section on battery maintenance. - goodnusedLv 61 decade ago
A battery will boil for about 4 main reasons.
1. ACID/WATER lever is over full.
2. Battery is being over charged.
3. Battery plates are shorting out and causing the Acid to boil. BATTERY D.O.A.
4. Dirty or Poor Connections on the battery posts. Us a sand paper and clean all connectors.
*** IN SITUATIONS WERE THE SEALS AROUND THE BATTERY POSTS ARE LEAKING GASES OR ELECTROLYTE? Use finger nail polish to reseal where the posts come through the case. Also make sure you have cleaned both battery's and all connectors, dirty connector will make a system charge and charge...as the Regulator can never Sense that the battery is fully charged and just keeps charging.
- 1 decade ago
Well since you've been doing this awhile i would
assume you already took a multimeter and checked
what the voltage was with the vehicle running? If that
checks out then maybe the battery is bad. To much power
seems to be going to the battery tho. Drive with caution
they definitly are capable of exploding.
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