A to Z Posted 23 hours ago Share Posted 23 hours ago One way to make your own alternator bracket for an ATLAS 4.2 / Vortec 4200, part 1: Ok, so to make a bracket, I took my alternator down to the hardware store, and found that 3/8 bolts fit in the holes just fine, I took three 4 inch long 3/8 grade 8 bolts what were all thread and dropped them in each hole and then used nuts to adjust and get the alternator sitting level and off the ground. Then I played with spacers and nuts to come up with a height that was level and off the plate It will need 2 nuts back to back welded together to give plenty of threads to hold the alternator on the bracket. I stuck the spacers and nuts stacked together under each corner to ensure the height was sufficient to keep the housing off of the plate. After that I centered it on a piece of cardboard and used a pen to draw around each bolt. then I removed the alternator, and made sure the piece of cardboard was cut in straight lines so I could get measurements later. once I got back to the garage, I then took the cardboard and held it up in the area I wanted the alternator to sit. After determining that, I used a pen to push holes in the cardboard where the bolts go through and then held it up and used the pen to push holes where the bracket will bolt to the engine. Lastly, I took a straightedge, and lined up the alternator pulley with the crank pulley and used the pen again to punch holes through the cardboard into where the mounting holes are. I now have the template. the bolts I bought and put through the alternator brackets will hold he spacers and nuts and they will be welded together and welded to the spots on the metal plate. The hole I punched through the cardboard into the engine block holes will be drilled out. once welded there will be 3 2-3" tall "towers" sticking up. I will cut gusset "triangles" out of steel and have them welded to the plate on the bottom and backed up to each tower for reinforcement. As I get further I will continue to show the progress, and will give all the specifics so that the next guy, free of charge, can get his alternator on there. Quote Link to comment Share on other sites More sharing options...
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