How to Replace an Alternator Toyota Lexus V6

How to Replace an Alternator Toyota Lexus V6

Here’s how to replace an alternator on a Toyota or Lexus with a V6 engine.

An alternator provides a means to charge the car’s battery and supply electrical demand to a car’s electrical subsystems. When an alternator fails, the battery dies and the electrical load can no longer be supported. The alternator must then be tested and then replaced.

To test an alternator, make sure the battery is giving 12+ volts without load. Start the car and measure the voltage across the battery terminals, it should be 14.6V. Slowly turn on all the accessories on the car (lights, stereo, HVAC, wipers, etc) and watch the voltage drop. It should sustain more than 13V.

In this video, the alternator is removed from a Toyota 1MZ-FE engine. It involves the removal of the alternator / A/C accessory belt, held on by two pinch bolts and a tensioner bolt. Once electrical connections are removed, the alternator can be wiggled through the A/C compressor flexible line out of the engine bay to be rebuilt or replaced.

Learn more on how alternators work in this video:
https://www.youtube.com/watch?v=olA3xTzQBkk

Learn how to replace an alternator on a newer Toyota/Lexus with a longitudinally mounted V6 engine here:
https://www.youtube.com/watch?v=WOcpiprx5N0

Get your replacement alternator here:
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Basic 3/8″ Socket set:
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https://amzn.to/2vFCnGm (Canada)
Multimeter for testing voltages:
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This is the Camera I use:
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Comments

Rara Nguyen says:

3:18 is that a small exhaust leak? And I have good ears I hear an exhaust noise coming from the engine a little

Joe The Eurosquatter says:

A cordless impact saves SO MUCH time. I can troll the scrapyard all day with just one fully charged 3Ah battery, even with my older DeWalt brushed-motor impact. In fact, if I had to do it again, I'd buy an even smaller impact. Makita used to have one with a 3-cell magazine-type pack like the Milwaukee M12, which I used and was excellent. Most contractors still shunned 12V* tools as wimpy, thereby relegating them to DIYers who now sell them cheap on Kijiji. Being a "dumb" battery, the cells are also easily replaceable with any 18650 of sufficient power density (current rating).

*10.8V nominal, of course…"12V" is marketing trash!

Mian Arshad says:

Was there no need to sand the alternator connections? And why didn't you check the battery volts after replacing alternator? some people apply silicone paste or petroleum jelly on the battery's terminals as an extra layer of protection.

MOIZ MUGHAL says:

best wishes from pakistan

Brandon Osborne says:

So many flashbacks for me. I've done that on a 1mz and 3mz. Ever break that tensioner bolt because of rust? I did….

nasedo3129 says:

Short and sweet…excellent as always!

test40323 says:

I would think a Lexus would have an automatic belt tensioner?

Squanch Wanch says:

Am i tripping or did u do this video already?

narlycharley says:

You need yourself a new ratchet with more teeth. lol. I know that one works, but man, it'll make your life a lot nicer. Love the content you put out.

Ahmad Fathlillah says:

Looks really easy.
On my car, removing intake manifold and right side front tire is sure make this job hell a lot easier.
If not, I need a lot of swearing to get this job done.

Jim Trainor says:

What brand of replacement alternator did you use?

Brettisgg says:

just did this on my lexus a few months ago, but still watched the entire video. CONTENT.

William Hagler says:

I just replaced mine but it's running a little warm, which I don't think it should be doing. The voltage is OK.

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