Batter Overcharging

[lesseragitant]

Hi guys

This is my second alternator in a span of few months & under 200k. 1st time, all the dash lights came on while driving & when i got home the battery leaked water & was flat. I checked the voltage & it was reading over 16v(maxed ).

So i thought its the alternator busted & got a 2nd hand one installed it & everything was fine straight away.

Then few days ago the above sequence of events happened again, but this time only the batt light came on. I had power to drive home.

So whats killing my alternator ?

Edited January 6, 2012 by lesseragitant

[Carbon 34]

car shorts(not likely unless you have hacks in wires)? , bad battery, dead shorting inside the case (shite can that water battery there junk and part of the problem ) ? , too many RPM can kill them ? buy a underdrive pulley to slow it down

run a 4ga ground wire from the alternator bracket to the neg battery to improve voltage charging and spark voltage , upgrade the alterantor charge wire to 4GA and clean the voltage regulator plug connection with proper contact cleaner, check the connection of the factory battery grounds

do you rinse your engine off with water ? degreaser ? a huge blast of either can be fatal inside the alterantor.

dont spill oil inside it ?

dont use the crappy little jap batteries that come in GTT , and upgrade the connectors to australian sizes , car audio ones are best to use

if you run a big stereo then you have some other items to review.

[StevenCJR31]

Sounds like a dead voltage regulator. . .

[lesseragitant]

thnx carbon 34 ... will do what you've said & see what happens ..also thnx to steven

[mad082]

given that the replacement alternator you bought was second hand, you can't rule out it just being on it's last legs and nothing more.

having said that, doing what carbon 34 said wouldn't be a bad thing to rule out other possible issues.

[lesseragitant]

given that the replacement alternator you bought was second hand, you can't rule out it just being on it's last legs and nothing more.

having said that, doing what carbon 34 said wouldn't be a bad thing to rule out other possible issues.

I C ..ok thnx