Engine to body ground...? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 04-03-2006, 03:19 PM   #1
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Default Engine to body ground...?

I am looking to do the "big three" and I can't find the engine to body ground. where should I look?

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Old 04-03-2006, 03:26 PM   #2
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you can do one off the alternator bracket and there is a block gnd under the front manifold if I remember correctly.
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Old 04-03-2006, 04:34 PM   #3
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Engine block isn't body though.

The grounds I know about for the body are located behind the battery and opposite the battery on the driverside fender as well. Then you have the battery cable that comes from the battery to the front of the engine block right behind the ac compressor and a ground on the back of the block that is next to the oil pressure sender.
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Old 04-03-2006, 05:16 PM   #4
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body grounds can be made anywhere there is metal. You dont need OEM locations.
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Old 04-03-2006, 05:17 PM   #5
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Would this work if I ran a ground from the alternator mounting post to the same ground the battery uses? Would this work for the body to engine ground? Or should I look elsewhere?
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Old 04-03-2006, 06:18 PM   #6
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Quote:
Originally Posted by mountainman_ou
Would this work if I ran a ground from the alternator mounting post to the same ground the battery uses? Would this work for the body to engine ground? Or should I look elsewhere?
yeah it would work. I would suggest running a wire from alt- to batt- then from batt- to gnd

which covers 2 of the 3 "Big3"

then alt+ to batt+

what ga. wire do you plan to use?
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Old 04-03-2006, 06:57 PM   #7
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I plan on using 0 or 2 ga. wire. I am going to do this, clean out the evap and clean up the engine bay tomorrow or wednesday.
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Old 04-03-2006, 07:14 PM   #8
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Quote:
Originally Posted by mountainman_ou
I plan on using 0 or 2 ga. wire. I am going to do this, clean out the evap and clean up the engine bay tomorrow or wednesday.
what are your reasons for going so big? Seems quite obsessive.
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Old 04-03-2006, 07:20 PM   #9
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Well, I may end up going with 4 ga. I wanted to go as large as possible, but I may be on the extreme side of things. Just want to make sure the stereo and other electrical components are getting enough juice this spring/summer when i start using the AC more.
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Old 04-03-2006, 07:22 PM   #10
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well what are you running for stereo?

my guess is that unless you are running a 200+amp alt plus a few thousand watt (rms) stereo you wont need larger than 4ga. My suggestion would be to leave all the stock wiring on also just incase a crimp fails or w/e. So you dont leave yourself stranded.
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