There's a bracket on the lower part of the intake manifold that has two grounds going to it, connected by two seperate bolts to different spots on the bracket.

Last night I sheared one of the bolts going into the bracket (torqued it too tight and the head sheared off), while installing an ooglie hyper ground wire. So I just put both of the factory grounds and my 8ga wire to negative battery terminal all on the other bolt.

I don't know too much about electricity. Will this hurt my grounding performance for the fuel system, to have both the factory grounds on the same bolt? They were on the same bracket anyways, but is it bad to have them attached to the bracket at the same point, touching like that?

 

You need to get a new upper manifold to fix that.

 

You could retap the stripped hole to the next larger size bolt. FYI, those two ground points are for the ignition coils. I don't see any harm with combining those two. You have to be vary careful when torquing down aluminum parts.

 

I think I may have done the same mistake, if not in the same spot somewhere else but very similar. When changing my knock sensor, I noticed that there was only one wire going into i. After doing some research, I read that teh ground for it is grounded on the upper intake manifold. I disconnected that bolt as well as the one right next to it, I did this to sand it down, to make the connection better. After I did the first one, i tightened. I did the second one, and when I tightened, the head screwed right off, felt like puddy. I was ****ed but owrried, I didnt know what to do. SO i just put both connections on that one ground. It shouldnt be a problem because a ground is a ground. I plan on one day drilling through that bolt and making a new hole to put a bigger one and hopefully nto have to share the ground anymore.

 

A ground is a ground, sure. But now that top ring terminal is grounded through the ones below it and going through additional metal-metal contacts than before... contacts that can oxidize and be less conductive over time.

I broke the same bolt. Don't know what it was made of but it wasn't stainless steel! When I get the opportunity, I plan to drill the part left in there and reuse that hole for another grounding bolt as the mfg intended.

 

Yeah, I was thinking along the same lines. It shouldn't make much of a difference, but someday I'll remove what's left of the bolt and put it back into mfg spec. With the ground wire to the battery I added on top of the injector grounds, it should still be better than before.

BTW, this ooglie hyper grounding has turned out to be an excellent mod, and cheap to boot. Thanks for the directions Mishmosh! I used the same grounding points you did in your post here: http://forums.maxima.org/showthread....ie+ground+wire

I cleaned all connections and used dialectic grease per Anachronism. Also added my own touch with 3M Electrical Coating found in the automotive battery accessory area at Meijer, which I put on all connections except for the battery terminal, because it dries into this thick brown gunk that isn't so easy to remove. Around the battery terminals I put those felt rings which I think are designed to soak up moisture or something, I don't know, lol. They were cheap.

My music (through stock Bose) sounds noticably better now and my headlights are brighter, though I haven't yet checked if they still dim when I roll up windows that were already up. The engine revs smoother and responds better. Also, I recently got 28 mpg doing all highway, when it used to be more like 24.