Alternator overcharging?
Thread Starter
Drifting
Joined: Nov 2013
Posts: 1,546
Likes: 281
From: Scottsdale Arizona
Alternator overcharging?
I think I've discovered what's been killing my battery. I got a new battery and installed it in the car and checked the voltage at the battery and saw 12.5 volts per my volt meter. I have the same voltage on the positive post on the alternator. I started the engine and saw the voltage was 16.7 at the battery and the same on the alternator. As I checked the battery I saw it boil over so I immediately shut down the engine. My car is a 68 and has the external voltage regulator. The alternator is new, but the voltage regulator is not. Could it be that my voltage regulator needs replacing?
Team Owner
Joined: Jan 2007
Posts: 53,648
Likes: 878
From: Southern Cal Ca
St. Jude Donor '22
I think I've discovered what's been killing my battery. I got a new battery and installed it in the car and checked the voltage at the battery and saw 12.5 volts per my volt meter. I have the same voltage on the positive post on the alternator. I started the engine and saw the voltage was 16.7 at the battery and the same on the alternator. As I checked the battery I saw it boil over so I immediately shut down the engine. My car is a 68 and has the external voltage regulator. The alternator is new, but the voltage regulator is not. Could it be that my voltage regulator needs replacing?
Thread Starter
Drifting
Joined: Nov 2013
Posts: 1,546
Likes: 281
From: Scottsdale Arizona
No, I didn’t know that. When I first got the car running I checked the voltage and it was only 12.2 volts and now it’s well over 16 almost 17. I’ll watch the video and try it. I just don’t want to fry another battery. Thanks.
