March 18, 2025, 05:25:28 PM

Author Topic: How do I take apart an LS1 alternator to paint the cover?  (Read 2770 times)

Offline adrenalinejunky

How do I take apart an LS1 alternator to paint the cover?
« on: April 10, 2012, 01:43:49 AM »
as title states. There are a couple wires leading up into the plastic that idk how to disconnect to sandblast and paint the covers. I took out 4 small reverse torx bolts but cant seem to figure this one out :(

notice in the pics that going from the metal part to the plastic part there are 3 wires that look like they cant be disconnected.... [attachimg=1][attachimg=2]

Offline 65imp

Re: How do I take apart an LS1 alternator to paint the cover?
« Reply #1 on: April 10, 2012, 12:37:26 PM »
You have to de-solder those.  They are on there pretty good too.  Then the case halves come apart.  But, then the central portion of the alternator is virtually impossible to separate from the front half of the case.  You want to do everything you can not to scratch the coating on the wires on that central part, as that can notably reduce cooling. 
Danzan and I got about 90% through disassembly a couple years back, then we scratched up those wires enough that he was concerned about reduced output of the alternator.  Also the case serves as a ground, so you have to make sure not to paint certain surfaces, use appropriate dielectric n some surfaces etc. 

I decided not to spend any more hours on it with a potential negative outcome.  I have all the parts in a box somewhere.   :(

That said, I had more pressing things to do on the car at that time.  I may pull that stuff out sometime if I am bored...
I say if you are going through all the effort make sure you use catalyzed paint at the very least, powdercoat would be better, and anodization would also be a good way to go.  You don't want to get everything done, then scratch your finish!  >:(

Please post what you find if you decide to proceed, I am sure others have considered, or completed the operation. 
absolute power corrupts absolutely  :yay:
93 FD widebody - destroked
69 Suburban - positive manifold pressure
72 Blazer - 6.0, 6speed 4wd
65 Impala - 5.7
59 cad  - 5.3
53 spartan - crash pad status

Offline adrenalinejunky

Re: How do I take apart an LS1 alternator to paint the cover?
« Reply #2 on: April 10, 2012, 12:54:09 PM »
You have to de-solder those.  They are on there pretty good too.  Then the case halves come apart.  But, then the central portion of the alternator is virtually impossible to separate from the front half of the case.  You want to do everything you can not to scratch the coating on the wires on that central part, as that can notably reduce cooling. 
Danzan and I got about 90% through disassembly a couple years back, then we scratched up those wires enough that he was concerned about reduced output of the alternator.  Also the case serves as a ground, so you have to make sure not to paint certain surfaces, use appropriate dielectric n some surfaces etc. 

I decided not to spend any more hours on it with a potential negative outcome.  I have all the parts in a box somewhere.   :(

That said, I had more pressing things to do on the car at that time.  I may pull that stuff out sometime if I am bored...
I say if you are going through all the effort make sure you use catalyzed paint at the very least, powdercoat would be better, and anodization would also be a good way to go.  You don't want to get everything done, then scratch your finish!  >:(

Please post what you find if you decide to proceed, I am sure others have considered, or completed the operation.


I have no problem putting the work in. I actually found a write up after looking for 3 hours... I dicked with my sodder before i even posted it but it wasnt strong enough. Anyways, in the write up (that i now cant find) the guy just sniped it with a diagnal cutters and then resodderd it together afterwards. Ill powder coat it- thanks for the advice i didnt think about the paint causing problems. Here is how I sit now. stumped on how im going to get the rest seperated from the case..... the third pic is to show the snips....[attachimg=1][attachimg=2][attachimg=3]