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Corvette
C3 Forum
1979 corvette ..
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<blockquote data-quote="theboss" data-source="post: 93771" data-attributes="member: 1458"><p>About your alternator, It does get hot when its charging max power. A weak battery will make it work way to hard and make the stator overheat. Your alt. is probably a 70 to 80 amp rating at high rpm, to keep the engine running, you probably use at least 25 to 30 amps so if the battery isn't to good the alt. is always running max power trying to recharge it and creating a lot of heat. Terminal "Bat" should be live all the time, terminal #2 should have power with key at "run" position and terminal #1 is connected to the printed circuit to feed the voltmeter or "battery" indicator lamp according to your equipment.. All ground goes true the alternator housing to the engine block. If you suspect a problem with the ground (corrosion can isolate the alternator even if it is bolted on) use a boosting cable conneted from the battery negative to the housing of the alternator, you will then eliminate any ground problem. An old sealed beam make a good tool to test the 2 powers that feed bat and #2 terminals. Connect the old sealed beam directly to the battery and check how strong is the light, then leave it connected to the groung and the other lead to "bat" terminal on the back of the alternator, it should be as strong as direct to the battery, repeat the process with the power (key on) from terminal #2 (disconect it from the alternator to make this test) Should also be as strong. There is some great equipment to run good test but they are expensive, if all you powers are good, the ground is good and the battery is good and fully charge then ask Santa for a new alternator. Good luck. Stephane</p><p><img src="http://www2.shopkeypro.com/img/G09344705" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p></blockquote><p></p>
[QUOTE="theboss, post: 93771, member: 1458"] About your alternator, It does get hot when its charging max power. A weak battery will make it work way to hard and make the stator overheat. Your alt. is probably a 70 to 80 amp rating at high rpm, to keep the engine running, you probably use at least 25 to 30 amps so if the battery isn't to good the alt. is always running max power trying to recharge it and creating a lot of heat. Terminal "Bat" should be live all the time, terminal #2 should have power with key at "run" position and terminal #1 is connected to the printed circuit to feed the voltmeter or "battery" indicator lamp according to your equipment.. All ground goes true the alternator housing to the engine block. If you suspect a problem with the ground (corrosion can isolate the alternator even if it is bolted on) use a boosting cable conneted from the battery negative to the housing of the alternator, you will then eliminate any ground problem. An old sealed beam make a good tool to test the 2 powers that feed bat and #2 terminals. Connect the old sealed beam directly to the battery and check how strong is the light, then leave it connected to the groung and the other lead to "bat" terminal on the back of the alternator, it should be as strong as direct to the battery, repeat the process with the power (key on) from terminal #2 (disconect it from the alternator to make this test) Should also be as strong. There is some great equipment to run good test but they are expensive, if all you powers are good, the ground is good and the battery is good and fully charge then ask Santa for a new alternator. Good luck. Stephane [IMG]http://www2.shopkeypro.com/img/G09344705[/IMG] [/QUOTE]
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Corvette
C3 Forum
1979 corvette ..
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