heats up..... volts down - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Prerunner1982 · 05-11-2005, 05:23 PM

I have been having this problem for quite a few months... my volts seem fine until the truck warms up or it get hot under the hood and then they drop below 13 volts. About the time the temp gauge reaches operating temp, the volts drop off... my truck also seems to run a smidge warm, but thats a different store that i will address by changing the therostat first. At anyrate I beleive its my battery, in need of a new one.. just havent saved up for an Optima. Any ideas?

Justins76 · 05-11-2005, 11:44 PM

Alts have 2 ratings, Cold and Hot. Hot carries a lower rating. You might have just enough juice, but when it gets hot it can't make enough so you get a voltage drop. Have you tried a smaller alt pulley? I usually use them to help get the alt spinning a bit faster at idle. March Pulleys carries them.

05-11-2005, 05:23 PM	#1
Prerunner1982 Registered User Join Date: Oct 2002 Location: Edmond, OK Posts: 5,906	heats up..... volts down I have been having this problem for quite a few months... my volts seem fine until the truck warms up or it get hot under the hood and then they drop below 13 volts. About the time the temp gauge reaches operating temp, the volts drop off... my truck also seems to run a smidge warm, but thats a different store that i will address by changing the therostat first. At anyrate I beleive its my battery, in need of a new one.. just havent saved up for an Optima. Any ideas? __________________ Jon 1982 Chevy Silverado 350/th350.... RETIRED 1993 Jeep XJ 2 door(Cherokee) 4wd 4.0ltr/AX-15 (5spd)/NP231 .... Oklahoma Roll Call

05-11-2005, 11:44 PM	#2
Justins76 OutOfMyMind & I'llNeverKnowWhy Join Date: Apr 2004 Location: Another world, some other time Posts: 672	Alts have 2 ratings, Cold and Hot. Hot carries a lower rating. You might have just enough juice, but when it gets hot it can't make enough so you get a voltage drop. Have you tried a smaller alt pulley? I usually use them to help get the alt spinning a bit faster at idle. March Pulleys carries them. __________________ -Justin-Out of my mind and I'll never know why 1976 Chevrolet Silverado C10 350 4bbl / TH350 Big10 longbed 1986 Pontiac Firebird T-Top 5.0L TPI 700R4 WS6 1992 Pontiac Firebird T-Top 5.0L TBI 700R4 My cardomain page I don't like to save, it's more fun to spend!! Last edited by Justins76; 05-11-2005 at 11:47 PM.



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.