Blowing Alternators - Page 2 - Toyota 4Runner Forum

brillo_76 · 09-07-2022, 02:56 PM

You can also run the higher amp alts in the older rigs if you want. Just make sure you keep track of it. Probably be best to swap out the fuse and charging wire. Granted its 10 amps more and both the higher and lower modules don't exceed the 90 amp fuse in the older 3rd gens. ( 70 and 80amp)

Just don't make the mistake of putting the lower amperage one in the late modules.

The alt fuses are 1996-1998 [100 amp] 1999-2002 [120amp]

Rule of thumb is stick what matches the rigs. :-)

307Vintage · 09-07-2022, 03:20 PM

The Denso from Rock Auto is a 70 Amp.

brillo_76 · 09-07-2022, 03:26 PM

Quote:

Originally Posted by 307Vintage

The Denso from Rock Auto is a 70 Amp.

1996-1998 are the 70amp ones
1999-2002 are the 80 amp ones

Your good.. :-)

307Vintage · 09-07-2022, 03:38 PM

Is the ground that goes from the firewall, by the heater valve, to the back of the passenger side head the only motor to chassis ground? I checked continuity on both that one and the battery to chassis and they were both good. But I am going to pull the motor to chassis and make sure it is clean.

brillo_76 · 09-07-2022, 03:52 PM

Quote:

Originally Posted by 307Vintage

Is the ground that goes from the firewall, by the heater valve, to the back of the passenger side head the only motor to chassis ground? I checked continuity on both that one and the battery to chassis and they were both good. But I am going to pull the motor to chassis and make sure it is clean.

No that's the ground for the head.

Your negative terminal starter ground goes down the the block next to the oil filter. :-)

jross20 · 09-08-2022, 07:12 AM

Quote:

Originally Posted by 19963.4lsr5

You can also order a brush set from Toyota for around 25 dollars and instal them yourself. And save some money.

As long as you have a Japan spec Phillips screwdriver it’s easy.

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Is there a part number for that set?

19963.4lsr5 · 09-08-2022, 09:06 AM

Do you know which Alt you have?

I think the 27370 number is a fully loaded 70a.

Edit: the two part numbers before the last number are the OEM and Denso part numbers for the Alternator. I’m pretty sure it’s for the 70a Alt. The 80a Alt is totally different.

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Supergleep · 09-13-2022, 04:44 PM

I bought this a few years back to have a JIS screwdriver in the toolbox. It really does work better on any Japanese screws you have to deal with. Highly recommended

Vessel Megadora 980 Impacta P2x100 #2 Cross Point Impact Screwdriver - Phillips Head Screwdrivers - Amazon.com

jbtvt · 09-13-2022, 07:46 PM

Quote:

Originally Posted by 19963.4lsr5

Do you know which Alt you have?
I think the 27370 number is a fully loaded 70a.

Edit: the two part numbers before the last number are the OEM and Denso part numbers for the Alternator. I’m pretty sure it’s for the 70a Alt. The 80a Alt is totally different.

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Good info. Are the bearings that come with the Maniac kits made in China? Guessing that's why you have the other part numbers listed. I always assumed they were and just bought rebuilt Denso alternators

CougarHound · 09-14-2022, 12:25 AM

I'm still amazed that my original one still works....It might help to take apart the broken one and figure out why it is failing. I think there is a diode in there that you can check with a multimeter.

Electrical problems are not fun. What happened to the other car?

19963.4lsr5 · 09-14-2022, 07:45 AM

Quote:

Originally Posted by jbtvt

Good info. Are the bearings that come with the Maniac kits made in China? Guessing that's why you have the other part numbers listed. I always assumed they were and just bought rebuilt Denso alternators

The Manaic kit I used just for the VR. It was made in China. Didn’t feel like spending over 100 dollars for an OEM or napa voltage regulator for the sake of troubleshooting. The VR is still going strong. The problem ended up being a bad diode in the bridge…..

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