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10-24-2016, 10:52 PM
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#1 |
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Senior Member
 
Join Date: Mar 2014
Location: Toano, VA
Posts: 893
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Alternator Pulley Issues - BBC
Having issues with alternator pulley. 1984 K30 454 w/ac.
First started when the alternator belt flew off and got destroyed on the fan, and resulted in a new alternator, but it still slips and will literally burn its way off. I fired it up the other day with a new belt, tight as I can get it, for 20 seconds tops. Belt was real hot. Other belts still ice cold. Whats going on? Alignment is good. Not sure where to go.
__________________
"Sometimes I do serve as a good bad example. Glad to be of service." My Build Thread (1967 C10, lowered, EFI, daily truck): http://67-72chevytrucks.com/vboard/s...d.php?t=830809 |
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10-24-2016, 11:23 PM
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#2 |
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Registered User
Join Date: Jun 2015
Location: PA
Posts: 441
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Re: Alternator Pulley Issues - BBC
lets see some pics of your pulleys and belts setup.
is there any squealing of the belt?
__________________
- When the Reaper makes his deal, trust in your steel - '77 C10 350/350 2/4 drop and a mild street engine |
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10-25-2016, 12:51 AM
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#3 | |
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Senior Member
Join Date: Mar 2014
Location: Toano, VA
Posts: 893
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Re: Alternator Pulley Issues - BBC
Quote:
__________________
"Sometimes I do serve as a good bad example. Glad to be of service." My Build Thread (1967 C10, lowered, EFI, daily truck): http://67-72chevytrucks.com/vboard/s...d.php?t=830809 |
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10-25-2016, 11:24 AM
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#4 |
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Registered User
Join Date: Dec 2013
Location: Columbus, Oh
Posts: 367
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Re: Alternator Pulley Issues - BBC
Charge your battery before starting. A low battery puts a lot of load on the belt and pulley.
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10-25-2016, 08:57 PM
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#5 |
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Senior Member
Join Date: Mar 2014
Location: Toano, VA
Posts: 893
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Re: Alternator Pulley Issues - BBC
Belt squeals loads before - I put a pulley from a SB350 alternator on the new alternator, and belt dressing, and drove some and it seemed okay... the battery was recharged by a local Carquest, and seems to be holding strong at 13.5/14.
__________________
"Sometimes I do serve as a good bad example. Glad to be of service." My Build Thread (1967 C10, lowered, EFI, daily truck): http://67-72chevytrucks.com/vboard/s...d.php?t=830809 |
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10-26-2016, 05:30 PM
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#6 |
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Registered User
Join Date: Oct 2015
Location: Allen, TX
Posts: 63
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Re: Alternator Pulley Issues - BBC
This is probably not your problem, but I'll leave it here in case someone happens to make the same mistake I did.
I had a similar issue years ago after installing the engine in my Chevelle - alternator belt squeaked like crazy, got hot, and flew off. After several attempts at tightening and replacing the alternator, I pulled off all the pulleys to clean them up. Only then I realized the problem was mismatched water pump and crank pulleys. I don't remember exactly which was which, but I believe the crank had two identical pulleys and the water pump had one large and one small pulley. Basically, the alternator belt was being forced to slip around one of the pulleys, got fed up with it, and decided to end it's miserable life by being chopped to bits by the fan. I swapped out one of the pulleys, and all was right again. |
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10-26-2016, 11:14 PM
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#7 | |
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Registered User
Join Date: Jun 2015
Location: PA
Posts: 441
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Re: Alternator Pulley Issues - BBC
Quote:
__________________
- When the Reaper makes his deal, trust in your steel - '77 C10 350/350 2/4 drop and a mild street engine |
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10-27-2016, 09:10 PM
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#8 |
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Senior Member
Join Date: Mar 2014
Location: Toano, VA
Posts: 893
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Posted via Mobile Device
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10-27-2016, 09:11 PM
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#9 |
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Senior Member
Join Date: Mar 2014
Location: Toano, VA
Posts: 893
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This is the fan pulley. The first is the alternator.
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