Density Alternator Question

S

SC_4RunnerSC

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I appreciate this forum and all the great info on here. I have looked through a lot of previous threads before I posted this one so here is my question

When everyone says get a Denso alternator, is there a model specific? On RockAuto, there is model 2100434 for around $200. Toyota has a remanufactured one for almost $375. I believe I need an alternator since mine is original and have a 2000 with 169,000 and my battery light is on. Battery is about 6months old. I also plan on keeping the original and rebuilding it to have as a backup
 
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When I bought my 97 it came with a CarQuest reman. 5 years later the brushes were shot so I put OEM brushes in from Toyota.

A reman is still a OEM Denso Alt. It’s just that if you buy a reman from Denso it’s suppose to have the same quality parts as when it was new.


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Like [MENTION=99144]19963.4lsr5[/MENTION] mentioned, I'd first try replacing the brushes before dropping coin on a replacement alternator. It's very well possible all you need is a new set of brushes and I have the video below you can use as a tutorial to get it done. If you are going to go the replacement route, I'd definitely by a remanned Denso alternator.

<iframe width="560" height="315" src="https://www.youtube.com/embed/71_kBhg6_-A" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
 
One quick way to determine if the brushes are worn is to tap the alternator housing with a hammer. More often than not, the vibration will cause the worn brushes to reposition slightly, contact will improve, and the battery light will go out. Old tip from a Toyota mechanic I work with.

I was in the same boat as you though. I wanted to rebuild mine, but the slip rings were completely worn out. I bought the Denso reman from Rockauto instead.
 
For my 97, I bought a reman Denso (from densoproducts.com which is really sparkplugs.com) for a 2000 4Runner so I could go from 70 amp to 80 amp. 80 amp one fits with no hassle, uses same belts, etc. Current price $202.57 Mine has been in service for a bit over a year w/o problems. As expected.
 
19963.4lsr5 said:
When I bought my 97 it came with a CarQuest reman. 5 years later the brushes were shot so I put OEM brushes in from Toyota.

A reman is still a OEM Denso Alt. It’s just that if you buy a reman from Denso it’s suppose to have the same quality parts as when it was new.


Sent from my iPhone using Tapatalk
Click to expand...

Thank you for the information! That’s what I needed to know
 
mtbtim said:
Like [MENTION=99144]19963.4lsr5[/MENTION] mentioned, I'd first try replacing the brushes before dropping coin on a replacement alternator. It's very well possible all you need is a new set of brushes and I have the video below you can use as a tutorial to get it done. If you are going to go the replacement route, I'd definitely by a remanned Denso alternator.

<iframe width="560" height="315" src="https://www.youtube.com/embed/71_kBhg6_-A" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
Click to expand...

First thank you for all the helpful videos, I’m sure you get that a lot from everyone, but it’s a lifesaver for guys like me who want to learn and need a little extra confidence in wrenching.

Thanks for the information. I’ll buy a new one and put it in, then repair the original since I’d rather not be stranded in the middle of no where without service-since that’s where I fish a lot.
 
jlaho said:
One quick way to determine if the brushes are worn is to tap the alternator housing with a hammer. More often than not, the vibration will cause the worn brushes to reposition slightly, contact will improve, and the battery light will go out. Old tip from a Toyota mechanic I work with.

I was in the same boat as you though. I wanted to rebuild mine, but the slip rings were completely worn out. I bought the Denso reman from Rockauto instead.
Click to expand...

Thats good to know. I’ll have to try that this weekend before I order a new one. Thanks for the information! Yeah, I’d rather not be stranded at the worst time.
 
pluton said:
For my 97, I bought a reman Denso (from densoproducts.com which is really sparkplugs.com) for a 2000 4Runner so I could go from 70 amp to 80 amp. 80 amp one fits with no hassle, uses same belts, etc. Current price $202.57 Mine has been in service for a bit over a year w/o problems. As expected.
Click to expand...


Sweet good to know. I’ll shop around and take a look there. Thanks!
 
SC_4RunnerSC said:
First thank you for all the helpful videos, I’m sure you get that a lot from everyone, but it’s a lifesaver for guys like me who want to learn and need a little extra confidence in wrenching.

Thanks for the information. I’ll buy a new one and put it in, then repair the original since I’d rather not be stranded in the middle of no where without service-since that’s where I fish a lot.
Click to expand...

You're very welcome. Hope the swap goes smooth for you. Happy Wrenching!
 
19963.4lsr5 said:
Removing the plug in the back of the Alt can be a bugger.


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Click to expand...

You ain't kidding. The last time I removed one, I unbolted the alternator first and got the alternator in a position where it was more comfortable for me to get my hand on the connector to release it. Even then it was a hassle to remove.
 
I unbolt and move the alt to unplug them. Then I use hose plyers to hold the clip down and wiggle the wire out. :)
65d6a2fec718a1047ad3ff4e33990a73.jpg


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Should I also spray electric cleaner on the connection to the alternator?

Also the title of thread should be *Denso. Not density, damn auto correct
 
SC_4RunnerSC said:
Should I also spray electric cleaner on the connection to the alternator?

Also the title of thread should be *Denso. Not density, damn auto correct
Click to expand...


It’s mostly road grime. I have a pliers with an angled jaw and I use it to compress the lock tab and pull it out of the back of the Alt.


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Well I got it installed. Took about 2.5hrs but that’s for a few reasons. I took my time and watched the videos, but the hardest part was finding bolts to use to get that bushing out so the new alternator could go in. Hardware store is a good drive from me. Also dropped flex wrenches, sockets and other things lol. So it took a while but glad I learned how to do it. Thanks again gentlemen it’s much appreciated.

However, my battery light is still on. Any thoughts? Maybe fuses? I just changed my days lights to the led bulbs. It has a new starters and battery cables done by a mechanic.
 
SC_4RunnerSC said:
Well I got it installed. Took about 2.5hrs but that’s for a few reasons. I took my time and watched the videos, but the hardest part was finding bolts to use to get that bushing out so the new alternator could go in. Hardware store is a good drive from me. Also dropped flex wrenches, sockets and other things lol. So it took a while but glad I learned how to do it. Thanks again gentlemen it’s much appreciated.

However, my battery light is still on. Any thoughts? Maybe fuses? I just changed my days lights to the led bulbs. It has a new starters and battery cables done by a mechanic.
Click to expand...


If you put a LED in the Battery light, put the old bulb back in.

What is your voltage running?


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