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Old 06-30-2019, 12:28 PM
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68ragtop 68ragtop is offline
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Location: Green Bay, Wisconsin
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Default Rectifier diodes in late model car

Alternator crapped out this weekend on my wife Toyota. Has that common Denso Alternator. Pulled it apart & one of the Diodes in the Rectifier blew. I found replacement rectifiers but most have 12 diodes (4 per field) rather than the 6 this one has.

Any reason I cannot or shouldn't run the 12 diode rectifier? Seems I should be able to but am not sure why this one only has 6. Lower amp rating I would imagine?

I can post picts, but this is what I am looking at for a replacement.

https://www.maniacelectricmotors.com/77904070.html

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68 GTO 4-spd Convertible
78 S/E Trans am L78, WS6 Auto
78 S/E Trans am W72, WS6 Auto
79 10th aniv W72 Trans am
80 Indy pace car Trans am
89 Trans am GTA
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Old 06-30-2019, 10:14 PM
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LATECH LATECH is offline
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The 12 diode rectifier passes a "full wave "output. The six diode job is just a minimal out put single wave.

https://www.google.com/search?q=full...hrome&ie=UTF-8

The 12 diode model will put out a more consistent "effective voltage " and will handle more current/voltage before overheating.

Better output, longer life, yeah ,I would run it.

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Old 07-01-2019, 06:14 AM
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68ragtop 68ragtop is offline
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For the cost of the diodes, I am surprised it doesn't have 12. it has power everything, heated seats, etc. Looks like they use silver solder to connect the windings. I'll have to pick up a stick of that. Used to have some from some refrigeration work I did years ago, but thats long gone. I was just going to buy a new alternator, but they are over $200 rebuilt & who knows how worn out the core was. This one I know is clean with low miles so I am just going to repair it. I suppose I should replace the regulator while I am in there.... That thing is puny.

Thanks for the input!

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68 GTO 4-spd Convertible
78 S/E Trans am L78, WS6 Auto
78 S/E Trans am W72, WS6 Auto
79 10th aniv W72 Trans am
80 Indy pace car Trans am
89 Trans am GTA
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