Alternator-Battery issue, Overcharging ?

[sandman Member Find all posts View Profile Close sandman]

Hi Lads

I reckon my 2004 (pre-d4d) alternator is cooking batteries. I've always seemingly had battery issues....

So the go is this last Century one either shat itself or cooked, clearly its hard to work out which. It spat sulphur all over the place, I pulled it out and charged it and it seemed to come good. I put it in and let teh car run for 10 mins and at the battery terminals I'm seeing 14.1V, I'm thinking thats kinda high.

Autosparky said "Century are crap" and that AC Delco is the way, first alarm bell. He tested battery and yes its buggered, probably as it overheated and buggered the cells.

So I'm thinking 14.1V is a tad high but clearly its also charging current..... Is there an easyway I can test or take to another sparky ?

Any thoughts would be appreciated....

Cheers..Pete

[LeighW Avid PP Poster! Find all posts View Profile Close LeighW]

The charge voltage is temperature dependent, 14.1V sounds fine if the ambient is around 23C or cooler, what was the temperature?

[adrian5800 Advanced Member Find all posts View Profile Close adrian5800]

Hi Lads

I reckon my 2004 (pre-d4d) alternator is cooking batteries. I've always seemingly had battery issues....

So the go is this last Century one either shat itself or cooked, clearly its hard to work out which. It spat sulphur all over the place, I pulled it out and charged it and it seemed to come good. I put it in and let teh car run for 10 mins and at the battery terminals I'm seeing 14.1V, I'm thinking thats kinda high.

Autosparky said "Century are crap" and that AC Delco is the way, first alarm bell. He tested battery and yes its buggered, probably as it overheated and buggered the cells.

So I'm thinking 14.1V is a tad high but clearly its also charging current..... Is there an easyway I can test or take to another sparky ?

Any thoughts would be appreciated....

Cheers..Pete

Do you have a fuse in the ALT-S position in the engine bay fuse box or a booster diode?

[Guest Close Guest]

Few members have had issues with booster diodes causing their batteries to cook like this. Worth checking.

[money_killer Member Find all posts View Profile Close money_killer]

basically the range to charge a battery is 13.8-14.4v. anything less or more u will have issues. so not sure what going on in ur situation ....

[LeighW Avid PP Poster! Find all posts View Profile Close LeighW]

Few members have had issues with booster diodes causing their batteries to cook like this. Worth checking.

Hi Piggy,

Would be interested to know their setups, ie OEM alternator or not, what brand and type of battery, who's booster, what charge voltage were they seeing?

[Guest Close Guest]

Hi Piggy,

Would be interested to know their setups, ie OEM alternator or not, what brand and type of battery, who's booster, what charge voltage were they seeing?

Stock from my understanding. Matt 150 was one of them.

[LeighW Avid PP Poster! Find all posts View Profile Close LeighW]

Looks like he's not around anymore.

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