How to change an alt. on a 2nd gen. 420s?

[gotdunn]

what would be the best and most efficiant way to change the alt. on a 2nd gen 420a?

 

[murray1]

Here is what you would have easily found through searching


Method 1
Okay, there are a couple threads on 2gnt.com with more detailed instructions, but I'll give you the basics, because I remember doing this for my first time at Portland raceway in the dark, with just a jack and hand tools.

1. jack the car up on the passenger side.

2. remove the front wheel

3. remove the three bolts holding the under cover plastic peice.

4. loosen the power steering and ac pumps tensionor, and remove the belt, Or cut it if your going to replace it later.

5. This part I never actually could see what I was doing dark and I had a half working LED flash light, so I'm going to refer you to Team 2GNT Forums CAPS for particular visuals.
: Loosen the altenator's tensionor by reaching up and ontop of the altenator itself. (there might be a locking mechanism that you'll have to loosen before you can loosent he tensionor but thats kind of hazy to me.)

By the way you'll know its the tensionor your loosening because its the super long bolt that is huge and that you can barely see from looking down from the hood.

6. remove altenator belt.

7. There is bigger size bolt that goes through the bottom of the altenator and its bracket. And at least one maybe 2 on the top side to remove the altenator.

go through the steps backwards to put it back on and make sure that your tension on the belts are correct.

Method 2
My procedure is a little different...

1. Place thick plywood scrap under oilpan and secure with floor jack.
2. Remove center bolt on passenger's side motor mount.
3. Lift engine with jack.
4. Begin removing belt, bolts, etc. as outlined above. You'll also need to temporarily remove your cruise control stuff.
5. Remove alternator through opening between intake manifold and firewall. There will be no room if the engine isn't raised, and it's damn near impossible to remove it from under the car.
6. Repeat procedure in reverse.

You should also probably lift the front end of the car and keep it on jack stands, since you'll need to work from both underneath and above.

 

[Slo2gen]

Here is what you would have easily found through searching


Method 1
Okay, there are a couple threads on 2gnt.com with more detailed instructions, but I'll give you the basics, because I remember doing this for my first time at Portland raceway in the dark, with just a jack and hand tools.

1. jack the front of the car up and support it with some jack stands

2. remove the passenger wheel

3. remove the three bolts holding the under cover plastic peice.

4. loosen the power steering and ac pumps tensionor, and remove the belt, Or cut it if your going to replace it later.

5. Loosen the bolt on the side of the alternator tensioner.

6. Loosen all the alternator bracket bolts.

7. Loosen the tensioner bolt and remove the side bolt holding the alternator to the tensioner.

8. remove altenator belt.

9. Remove the bottom bolt on the alternator, it should drop the alternator.

10. Take off the front motor mount and side motor mount and play with the level of the engine by jacking it up and letting it down untill you are holding it just right then pull the alternator out the top!

go through the steps backwards to put it back on and make sure that your tension on the belts are correct.


Dont forget to unplug the alternator and unbolt the power wire, and disconnect the battery before you start!

 

[dr1665]

And have fun.

I've only replaced one 2GNT alternator while the engine was in the car. I hated that job. It was also in the dark in an apartment complex parking lot. It's not so hard disconnecting the damn thing as it is snaking it the f*ck out of the twisted nest of wires and brackets and onto the ground. Then you get the joy of trying to snake the new one in there.

It can and is done, but it's one of the more damning of things you might find yourself having to do. Good luck.

 

[Slo2gen]

And have fun.

I've only replaced one 2GNT alternator while the engine was in the car. I hated that job. It was also in the dark in an apartment complex parking lot. It's not so hard disconnecting the damn thing as it is snaking it the f*ck out of the twisted nest of wires and brackets and onto the ground. Then you get the joy of trying to snake the new one in there.

It can and is done, but it's one of the more damning of things you might find yourself having to do. Good luck.

Yeah, its not fun. I had to do about 2 of them and got bad ones for a auto parts store before I said F it and got an oem one. I put it on making it the 3rd and haven't had any problems out of it so far. It charges a litttle low but thats due to underdrive pulley.

 

[adammethner05]

Changing the alternator on my Talon sucked. I had to use a 2x4 to pry it out. Everything else took a few minutes, but getting the old alternator out and getting the new one back up in there took forever!