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Discussion Starter #1
I just got my 85 running again the other day after being worked on for the better part of a year and discovered that it wouldn't idle without any charge in the battery. This leads me to believe I have a bad alternator so I have a few questions.
1 Does my conclusion seem correct?
2 Where would the best place to get an alternator be and what are the specs I need to have?
3 Should I be looking to get an alternator that is different from factory specs?
4 Whats the best way to go about replacing it?
thanks!
 

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You could measure the voltage over the battery when it is running and if it is over about 14 volts then the alternator is probably fine.
I think i replaced mine a long time ago with one from a Camry 3.0. It had higher output which was nice. Had to switch over the pulley and widen the hole for the alternator axle though, but otherwise it was the same mounting.
I unfortunately did not write down what Camry it was from :( So if anyone knows what i'm talking about, feel free to add in because i really would like to know in case mine should break in the future.
 

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Discussion Starter #3
You could measure the voltage over the battery when it is running and if it is over about 14 volts then the alternator is probably fine.
I think i replaced mine a long time ago with one from a Camry 3.0. It had higher output which was nice. Had to switch over the pulley and widen the hole for the alternator axle though, but otherwise it was the same mounting.
I unfortunately did not write down what Camry it was from :( So if anyone knows what i'm talking about, feel free to add in because i really would like to know in case mine should break in the future.
Thanks for the info, it was 11.5 volts both engine off and engine on so i think i know its out now. Ill look into the camry alternator when i go to get a replacement.
 

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Lt. The alternator upgrades is for a 1992 Camry or Lexus V6 ONLY round plug

You can use the alternator with the supplied pulley just need to get a 360K6 or 370K6 belt/ or 6k370 belt and some use Ford Escort w AC 90s IIRC a 400K6 belt

No need to change pulleys
 

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Lt. The alternator upgrades is for a 1992 Camry or Lexus V6 ONLY round plug

You can use the alternator with the supplied pulley just need to get a 360K6 or 370K6 belt/ or 6k370 belt and some use Ford Escort w AC 90s IIRC a 400K6 belt

No need to change pulleys
Awesome, thanks for clearing that up! I will write a sticky-note and add that to my owner manual so i know what to get if mine ever should break.
I
 

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Discussion Starter #6
Are there any modifications necessary to put in the camry alternator? Or does it just go in the same as the stock one?
 

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Other than the belt should be plug and play...

My '86 will have this done for next winter...at idle with lights and wipers and stereo the stock alternator is at times showing below 13.8 volts...and its a Beck Arnley OEM replacement...
 

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Regarding the belt with a Camry alternator, I believe you can use a stock belt if you slice one rib off of it. I recall someone brought that option up, back in the day.
If your alternator is bad, I recall the brake light indicator and one other shows up in the dash. It's been so long that it had happened to me that I forget which combo it was...
 

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Discussion Starter #9
Luckily i found that my extra engine i have laying around has an alternator on it so i dont need to go buy one. I haven't done any work on the front of the car do you have any tips on what the best place to jack it up is. (And where to put jack stands after)
Thanks.
 

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I changed my alternator in my 86 without jacking the car up at all, stock ride height, and I have boobs lol. If you can't get under there from the front on the ground you're going to want to jack it up on the frame rail passenger side if using a normal jack, if using a scissor jack use the pinch weld
 

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👙I used ramps and cardboard in my driveway to slide around on. Most of the operation is done from below.
Be sure to tap-e-tap-tap the bushing on the alternator so it slides into place. You may consider doing the BIG 3 while you are in there: FAT wires.
15127
 

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Lt. The alternator upgrades is for a 1992 Camry or Lexus V6 ONLY round plug

You can use the alternator with the supplied pulley just need to get a 360K6 or 370K6 belt/ or 6k370 belt and some use Ford Escort w AC 90s IIRC a 400K6 belt

No need to change pulleys
Arch and others are correct. You do not HAVE to change the pulley, but then need either a different belt (that arch provided) or cut a rib off the MKII belt. (which is what I did). However, without swapping the pulley will result that at idle the lights, dash lights, etc. will dim, as the camry alt pulley is slightly larger than the MKII alt pulley. At idle, the camry alt pulley will not rotate enough to produce a proper charge. (at least this is my experience). Now, this is a minor inconvenience IMO, and I've not had any issues with batteries dying sooner. I will eventually get around to putting a MKII pulley on the alt, but its been years running with just the stock camry alt and pulley.

Ideally one would swap over the MKII pulley onto the camry alt.

Here is the part # for the camry alt. It applies to a 92 camry or 92 Lexus (lexus to 6/92 only) both with a 3VZFE engine

#27060-62070-84

Rick
 
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FWIW I did the Camry alternator swap with just a different belt and have not noticed any bad idle charging at all, even with headlights and AC on 🤷🤷🤷
 

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FWIW I did the Camry alternator swap with just a different belt and have not noticed any bad idle charging at all, even with headlights and AC on 🤷🤷🤷
not surprised, I've hear of people not having an issue and some do (like mine). Perhaps your car idles just above the amount needed for the regulator to operate, and mine idles slightly lower and just below the limit.
 
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not surprised, I've hear of people not having an issue and some do (like mine). Perhaps your car idles just above the amount needed for the regulator to operate, and mine idles slightly lower and just below the limit.
Strange because even as an automatic this car had relatively low idles 500/600, 800 plus with AC on. Blew the HG recently which might've been the idle drop, but either way the charging system has been spectacular since I changed the alternator. I used a Denso reman btw
 

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Manual and automatic cars idle at different speeds. Tanya's car is a manual transmission,; my slush box idles around 700 in DRIVE. I'm OK with the stock alternator around 13.8 volts.14 at cruising speeds. I really need to replace my Halogen fog lights with LED'S! They are always ON. Otherwise, my blue car is invisible.
 

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Dave I'm referring to my automatic 1986. My manual car actually has a 7M alternator.
 

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I forgot that you have TWO Supra's, Tanya. Your '85 has a stick shift and it's in your signature!
I LIKE my automatic car. A LOT. My A/C has been removed. You need yours.
Every 3 years the alternator goes tits-up. I'm OK with that. Oh Really specials.
 

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I used a shock shaft and a Tanya Harding hammer. Just do not break the ear off. A little HEAT helps a lot. The aluminium expands more than the steel bushing.
You could get fancy and use a large C clamp, but I'm usually tired by that time and in a frikken hurry. Dirty and tired of sliding around on the cardboard. Crap in my eyes, low light and slippery parts.
I'm OLD and weak.:rolleyes:
That issue pissed me off the most.
I'm ready to slide it into place and struggling with that bastard. Won't fit? WTH!

The micky-mouse belt tensioner is also a PITA. Did you snap it off? Not needed, really.
 
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