New CS130 Alternator Humming
#1
New CS130 Alternator Humming
I just installed a CS130 alternator in my car. I've had it for a year or so just sitting in a box. It is making a humming sound when the car is running. It is silent when the car is off. I have the Bat post tied back to the battery. I have the 'L' post tied to 12v with the ignition via the electric choke, which feeds off the ignition for the HEI.
The sound is only there when I have 12v to 'L'. The alternator is indeed charging as I read 14 volts when 'L' is connected and 12 volts when it isn't. I get the same noise when I send 12v directly from the battery (with the car running). Am I doing something wrong? Thanks in advance.
The sound is only there when I have 12v to 'L'. The alternator is indeed charging as I read 14 volts when 'L' is connected and 12 volts when it isn't. I get the same noise when I send 12v directly from the battery (with the car running). Am I doing something wrong? Thanks in advance.
Last edited by jcmoretti; April 1st, 2015 at 03:03 PM. Reason: wrong pic
#3
I'm not sure what is making your Diana moe humm. You must have a quiet car to hear it. Are you hearing it under the hood or through the radio? The cs130 had very close internal tolerances. The rear bearing was a problem. It may be rubbing if the rear bearing tolerance ring is bad. They can make a sound when charging, but usually it is described as a whine and not a hum. Can you be more specific about the noise?
#4
I just installed a CS130 alternator in my car. I've had it for a year or so just sitting in a box. It is making a humming sound when the car is running. It is silent when the car is off. I have the Bat post tied back to the battery. I have the 'L' post tied to 12v with the ignition via the electric choke, which feeds off the ignition for the HEI.
The sound is only there when I have 12v to 'L'. The alternator is indeed charging as I read 14 volts when 'L' is connected and 12 volts when it isn't. I get the same noise when I send 12v directly from the battery (with the car running). Am I doing something wrong? Thanks in advance.
The sound is only there when I have 12v to 'L'. The alternator is indeed charging as I read 14 volts when 'L' is connected and 12 volts when it isn't. I get the same noise when I send 12v directly from the battery (with the car running). Am I doing something wrong? Thanks in advance.
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