Go Back  YotaTech Forums > Toyota SUV & Truck Tech > 86-95 Trucks & 4Runners
Reload this Page >

120amp Jaguar Alternator Upgrade **HOW TOO**

Notices
86-95 Trucks & 4Runners 2nd/3rd gen pickups, and 1st/2nd gen 4Runners with IFS

120amp Jaguar Alternator Upgrade **HOW TOO**

Old 05-19-2014, 12:49 PM
  #61  
Registered User
 
Join Date: Aug 2010
Posts: 115
Thanks: 0
Thanked 0 Times in 0 Posts
Sounds like a much better Idea.. I am still trying to figure out how to make sure I get the wires to the right places though, as earlier in this thread someone said a mechanic found that some of the jag alts terminals are not the same as a toyota denso alt terminals.. Which is why people were killing their rotors, batteries, etc? Any info helps.

I guess I can buy the alt, take it to an alt shop and they can test em for me.
jcm151 is offline  
Old 05-19-2014, 05:54 PM
  #62  
Registered User
 
RAD4Runner's Avatar
 
Join Date: Mar 2012
Posts: 5,779
Thanked 50 Times in 44 Posts
Originally Posted by jcm151 View Post
... I am still trying to figure out how to make sure I get the wires to the right places though, as earlier in this thread someone said a mechanic found that some of the jag alts terminals are not the same as a toyota denso alt terminals...
Charging system is simple with no need to go fancy. Most of them are wired the same (See my build thread for Toyota 22RE charging system schematic) ; If both old and replacement alts have internal regulators, it would just be a matter of finding where "IG", "S", "L" and "B" terminals.

Unfortunately, your 1982 may have an external regulator, unlike the 1986's and later.

Why not find a schematic for the Jag AND yours and post them so we can compare? The the electrically savvy in the forum can help you.
RAD4Runner is offline  
Old 03-29-2015, 07:36 PM
  #63  
Registered User
iTrader: (1)
 
stanz's Avatar
 
Join Date: Nov 2011
Location: Portland, OR
Posts: 648
Thanks: 0
Thanked 0 Times in 0 Posts
So am I correct in reading that the stock pulley on the Jag alternator causes it to spin too slow and the amps at idle are lower as a result?

I posted a while back that I talked to an alternator shop that told me that the terminals were different on the jag vs toyota. I never got around the swap but my most recent online research suggests that the terminals are the same. Are people finding this to be true? Who's having issues with burning up rotors and batteries?
stanz is offline  
Old 03-29-2015, 08:45 PM
  #64  
Registered User
 
RAD4Runner's Avatar
 
Join Date: Mar 2012
Posts: 5,779
Thanked 50 Times in 44 Posts
Originally Posted by stanz View Post
So am I correct in reading that the stock pulley on the Jag alternator causes it to spin too slow and the amps at idle are lower as a result?

I posted a while back that I talked to an alternator shop that told me that the terminals were different on the jag vs toyota. I never got around the swap but my most recent online research suggests that the terminals are the same. Are people finding this to be true? Who's having issues with burning up rotors and batteries?
Stanz, care posting schematic of Jaguar so we can compare?

As for pulley speed, compare diameter of Jag alt pulley with stock Yota pulley.

Physical connectors may be different, but most likely same functionally.
IG for excitation
S for sensing/feeding back batt voltage
L- for charge fault
B-for actual output to batt
RAD4Runner is offline  
Old 03-29-2015, 09:04 PM
  #65  
Registered User
iTrader: (1)
 
stanz's Avatar
 
Join Date: Nov 2011
Location: Portland, OR
Posts: 648
Thanks: 0
Thanked 0 Times in 0 Posts
stanz is offline  
Old 03-30-2015, 12:14 AM
  #66  
Registered User
 
RAD4Runner's Avatar
 
Join Date: Mar 2012
Posts: 5,779
Thanked 50 Times in 44 Posts
Originally Posted by stanz View Post
There you go, exactly same termination. Just need to see if connectors are physically same. If not, just replace connector on harness with one to match the Jag one. IIRC, those who used this alt say it's plug-n-play, except for swapping the pulleys, and slight bending of bracket
RAD4Runner is offline  
Old 03-30-2015, 06:46 AM
  #67  
Registered User
iTrader: (1)
 
stanz's Avatar
 
Join Date: Nov 2011
Location: Portland, OR
Posts: 648
Thanks: 0
Thanked 0 Times in 0 Posts
Thanks RAD! The physical plug is the same. I caught the bracket bending note before. Now the only open question is pulley diameter... some have reported lower output at idle as the stock v belt pulley is a larger diameter than the jag serp pulley.

I ordered a smaller 17mm bore pulley online last night to have on hand. Hoping that does the trick.
stanz is offline  
Old 04-09-2015, 03:39 AM
  #68  
Registered User
 
Join Date: Sep 2013
Posts: 125
Thanks: 0
Thanked 0 Times in 0 Posts
Originally Posted by stanz View Post
I ordered a smaller 17mm bore pulley online last night to have on hand. Hoping that does the trick.
Any news on this, it would be nice if someone could find a source for a proper pulley.
chuckross1957 is offline  
Old 04-09-2015, 06:15 AM
  #69  
Registered User
iTrader: (1)
 
stanz's Avatar
 
Join Date: Nov 2011
Location: Portland, OR
Posts: 648
Thanks: 0
Thanked 0 Times in 0 Posts
Yes, the stock pulley is the way to go. Just bore it out to 17mm. The inner diameter of the belt groove is already smaller than the Jag pulley. The next size down is so small that there is no room for a recess on its face. That makes it too tall front to back preventing the nut from getting any threads to bite on.

Turns out that other poster had bad grounds. His issues were not pulley related.

Last edited by stanz; 04-09-2015 at 06:16 AM.
stanz is offline  
Old 04-11-2015, 08:33 AM
  #70  
Registered User
iTrader: (1)
 
stanz's Avatar
 
Join Date: Nov 2011
Location: Portland, OR
Posts: 648
Thanks: 0
Thanked 0 Times in 0 Posts
One more things you should know if you're attempting this upgrade...

The factory ring terminal for the B post is too small. You'll need to increase its size to 5/16:



Here's mine installed:

stanz is offline  
Old 04-23-2015, 08:17 AM
  #71  
Registered User
 
Join Date: Jan 2015
Posts: 13
Thanks: 0
Thanked 0 Times in 0 Posts
Originally Posted by stanz View Post
Yes, the stock pulley is the way to go. Just bore it out to 17mm. The inner diameter of the belt groove is already smaller than the Jag pulley. The next size down is so small that there is no room for a recess on its face. That makes it too tall front to back preventing the nut from getting any threads to bite on.

Turns out that other poster had bad grounds. His issues were not pulley related.

SO quick question do I bore the pully off of my alternator out to 17mm all the way through and then just put on the new alternator? Im about to do this today
aportis72 is offline  
Old 04-23-2015, 08:45 AM
  #72  
Registered User
iTrader: (1)
 
stanz's Avatar
 
Join Date: Nov 2011
Location: Portland, OR
Posts: 648
Thanks: 0
Thanked 0 Times in 0 Posts
Originally Posted by aportis72 View Post
SO quick question do I bore the pully off of my alternator out to 17mm all the way through and then just put on the new alternator? Im about to do this today
Yes, you bore it all the way through.
stanz is offline  
Old 04-23-2015, 10:59 AM
  #73  
Registered User
 
Join Date: Jan 2015
Posts: 13
Thanks: 0
Thanked 0 Times in 0 Posts
Originally Posted by stanz View Post
Yes, you bore it all the way through.
STANZ what pully did you use? That looks like a new one in the picture.

Oh and I had to order a 17mm drill bit. Nobody in my area had one.
aportis72 is offline  
Old 04-23-2015, 12:28 PM
  #74  
Registered User
iTrader: (1)
 
stanz's Avatar
 
Join Date: Nov 2011
Location: Portland, OR
Posts: 648
Thanks: 0
Thanked 0 Times in 0 Posts
Originally Posted by aportis72 View Post
STANZ what pully did you use? That looks like a new one in the picture.

Oh and I had to order a 17mm drill bit. Nobody in my area had one.
It's the stock pulley. I had a reman Autozone alternator so the pulley was only a few years old.
stanz is offline  
Old 04-26-2015, 03:28 PM
  #75  
Registered User
 
Join Date: Jan 2015
Posts: 13
Thanks: 0
Thanked 0 Times in 0 Posts
Put mine on today. I used a Denso alternator. Went very well. Sending back my old dead stock alternator as the core haha. Maybe I will get credit for it maybe not.
aportis72 is offline  
Old 06-01-2015, 11:53 PM
  #76  
Registered User
iTrader: (1)
 
stanz's Avatar
 
Join Date: Nov 2011
Location: Portland, OR
Posts: 648
Thanks: 0
Thanked 0 Times in 0 Posts
I've got some miles on the Jag alternator now and thought I'd report that I have had no issues. It's working out just great.
stanz is offline  
Old 06-12-2015, 06:11 PM
  #77  
Registered User
iTrader: (1)
 
frm_808's Avatar
 
Join Date: Apr 2007
Location: las vegas, hawaii
Posts: 245
Thanks: 0
Thanked 0 Times in 0 Posts
Great Mod! Had mine on for a couple years now and no problems
frm_808 is offline  
Old 03-04-2019, 10:24 AM
  #78  
Registered User
 
Join Date: Mar 2019
Posts: 6
Thanks: 0
Thanked 0 Times in 0 Posts
Originally Posted by aportis72 View Post
SO quick question do I bore the pully off of my alternator out to 17mm all the way through and then just put on the new alternator? Im about to do this today
I wanna do this setup but Iím having trouble understanding the pulley issue. I understand you canít use the pulley off the jag but you can use the pulley off your old alternator since itís a 17mm? Sorry if these are dumb questions but also bore it all the way through then put the alternator on? So youíre drilling out the center of the pulley to basically have a 17mm circle? Any clarification would be helpful sorry I donít understand

Last edited by Bruin425; 03-04-2019 at 10:42 AM.
Bruin425 is offline  
Old 03-04-2019, 10:33 AM
  #79  
Registered User
 
Join Date: Mar 2019
Posts: 6
Thanks: 0
Thanked 0 Times in 0 Posts
Originally Posted by rworegon View Post
Denso 210-0406 is the equivalent alt for the Jag.
between the two alternators which one will last longer? The Denso is cheaper than the duralast
Bruin425 is offline  
Old 03-04-2019, 07:53 PM
  #80  
Registered User
 
ZARTT's Avatar
 
Join Date: Jan 2010
Location: Martinez Ca.
Posts: 62
Thanks: 0
Thanked 1 Time in 1 Post
Although the original post is almost 7 years old, It is still relavent.
There is an easier way to upgrade to a higher output alternator though.
The GM CS-144 (140 amps) unit from a 94 Cadillac Northstar motor fits the 3VZE motor with almost no madification.
I got it from the scrapper for $35. It has the 6/12 o'clock mount ears, and sits in the upper V of the Cad. motor. Easy to remove.
The Cad.alt. has a serp pulley with one or two extra grooves, but when the Toy.hood is closed, who sees it?
No screwing with pulley swaps. (risk of damaging/bending the shaft is great.)
A rebuild kit(bearings,rectifiers, brushes and voltage regulator) for $50 from alternator man.com. (no Chinese crap also)
An adapter elec. cable for $19 from the same guy to mate the GM to Toy., and you are gold. The serp. belt will have to be changed also. (longer, took me 3 tries)
You will have to lengthen the slot on the adjuster bracket to provide more East/West swing for the alt body away from the block.
Also a bunch of washers behind (or in front of, I forget) the large bolt to orient the alt in a North/South direction for a straight belt path.
The Toy. large bolt works just fine. Do not use the GM bolt as it is an SAE pitch and will cross thread.
You may have to massage the air box a little to clear pulley rotation, though not too much, or it becomes epoxy time.
Remember to beef up your positive, and neg.cables to the battery. Also wherever their is a body, or engine ground, that also.
I can't stress that enough!!!
Swap the orig 80 amp main fuse in the 3VZE box for a 22RE 100 amp fuse. The orig V6 Toy alt. was only 65, or 80 amp output. (forget)
I hope this is helpful to anyone with this upgrade in mind.

Art.
ZARTT is offline  
The Following User Says Thank You to ZARTT For This Useful Post:
RAD4Runner (03-05-2019)
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
kawazx636
Vehicles - Parting Out
31
02-23-2016 11:57 AM
SpookyMulder
86-95 Trucks & 4Runners
10
11-04-2015 11:56 AM
Chicken12
95.5-2004 Tacomas & 96-2002 4Runners
6
10-14-2015 03:54 PM
89YodaRunner
86-95 Trucks & 4Runners
3
09-30-2015 02:18 PM
4runnerFireman
95.5-2004 Tacomas & 96-2002 4Runners
2
09-29-2015 06:24 AM


Thread Tools
Search this Thread
Quick Reply: 120amp Jaguar Alternator Upgrade **HOW TOO**


Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: