alternator diodes

RyanGT · April 11th, 2010, 07:39 PM

Are they replaceable? Or does it require huge amounts of digging in the alt? I'm getting ac voltage registering. I'm not positive of the amount, since the bottom of my multimeter is fubared ( decimal and bottom of number doesn't work).

and how much are these diodes? Found voltage regulators for about 30 bucks. Can't find diode packs (tho I'm, on phone so hard to search).

limited · April 11th, 2010, 08:47 PM

they are replaceable, ask for a rectifier bridge(sp?) at an alt rebuild shop. a parts house may carry them, I don't know

RyanGT · April 11th, 2010, 09:34 PM

Ok is it a pain or not too bad? And any specific ones for our alts, or upgraded ones?

RyanGT · April 12th, 2010, 01:05 AM

Every time i push in clutch for 3+ seconds the voltage drops to about 12 for a solid 5+ seconds or until i rev it. That sound like diodes or voltage regulator? Cruising on highway i can get a steady 13.5-6. And it is lower rpm than driving around town... seems weird! WOT still hitting 12's. But main problem is the low voltage spikes for drivability. Im going to try contacting my alt builder again. But want to make sure im giving him the right info (and hopefully get a brand new alt).

RyanGT · April 12th, 2010, 12:59 PM

Got a good ac voltage reading... got 29.x. Guess i found problem. Hope it isn't difficult to replace. Looking now and i can only find the external rectifiers, and i think they are a supplement not a replacement?

April 11th, 2010, 07:39 PM	#1
RyanGT MM Fanatic 2000 GT Join Date: Dec 2006 Location: Lynnwood, Washington Posts: 4,258 iTrader: 4 reviews	alternator diodes Are they replaceable? Or does it require huge amounts of digging in the alt? I'm getting ac voltage registering. I'm not positive of the amount, since the bottom of my multimeter is fubared ( decimal and bottom of number doesn't work). and how much are these diodes? Found voltage regulators for about 30 bucks. Can't find diode packs (tho I'm, on phone so hard to search). __________________ 2000 Black convertible GT: KB 15psi, and other goodies... 1971 Datsun 240 z: Header and rebuilt motor. (The DD)

April 11th, 2010, 08:47 PM	#2
limited Premium Member 99 limited edition vert Join Date: Mar 2007 Location: Tacoma,Washington Posts: 3,297 iTrader: 0 reviews	they are replaceable, ask for a rectifier bridge(sp?) at an alt rebuild shop. a parts house may carry them, I don't know __________________ KB'd 446rwhp/451rwtq, Mustang Dyno http://www.youtube.com/watch?v=3ZDpQ0EEm1M Tuned by Joe at http://www.tricktuners.com

April 11th, 2010, 09:34 PM	#3
RyanGT MM Fanatic 2000 GT Join Date: Dec 2006 Location: Lynnwood, Washington Posts: 4,258 iTrader: 4 reviews	Ok is it a pain or not too bad? And any specific ones for our alts, or upgraded ones? __________________ 2000 Black convertible GT: KB 15psi, and other goodies... 1971 Datsun 240 z: Header and rebuilt motor. (The DD)

April 12th, 2010, 01:05 AM	#4
RyanGT MM Fanatic 2000 GT Join Date: Dec 2006 Location: Lynnwood, Washington Posts: 4,258 iTrader: 4 reviews	Every time i push in clutch for 3+ seconds the voltage drops to about 12 for a solid 5+ seconds or until i rev it. That sound like diodes or voltage regulator? Cruising on highway i can get a steady 13.5-6. And it is lower rpm than driving around town... seems weird! WOT still hitting 12's. But main problem is the low voltage spikes for drivability. Im going to try contacting my alt builder again. But want to make sure im giving him the right info (and hopefully get a brand new alt). __________________ 2000 Black convertible GT: KB 15psi, and other goodies... 1971 Datsun 240 z: Header and rebuilt motor. (The DD)

April 12th, 2010, 12:59 PM	#5
RyanGT MM Fanatic 2000 GT Join Date: Dec 2006 Location: Lynnwood, Washington Posts: 4,258 iTrader: 4 reviews	Got a good ac voltage reading... got 29.x. Guess i found problem. Hope it isn't difficult to replace. Looking now and i can only find the external rectifiers, and i think they are a supplement not a replacement? __________________ 2000 Black convertible GT: KB 15psi, and other goodies... 1971 Datsun 240 z: Header and rebuilt motor. (The DD) Last edited by RyanGT; April 12th, 2010 at 01:21 PM.

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