Alternator at 13.0 Volts after hot
Thread Starter
Joined: Apr 2003
Posts: 2,597
Likes: 4
From: Lawrenceville, GA
Alternator at 13.0 Volts after hot My Alternator just started dropping voltage. After the engine gets hot it sets at 13.0 Volts. Should I be worried? It has always been higher than this until it started getting hotter outside. I only have 24K on the car but do have an underdrive pulley. Should I get an overdrive alt pulley to maybe help this out?
Bill
Bill
Mine always sits at 13 volts or lower at idle (both underdrive pullies). I've run both an Optima Red top and I now run a 10lbs Hawker with no issues. I would say that you have nothing to worry about if you have a half decent battery that can handle alittle cycling. 
remove ground from pass fender well, remove paint from mount on fender, reinstall ground, check for corrosion on bolt,clean as necesary....I did this to all the grounds (withinn easy reach) under the hood and picked up about 1 charging volt
