Honda Civic / Del Sol (1992 - 2000) EG/EH/EJ/EK/EM1 Discussion

Engine Ground Theory

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Old Jan 8, 2003 | 04:34 AM
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Default Engine Ground Theory

Okay, i know that you are supposed to ground the motor to that little tiny bolt that sits above the headlight, but i'm affraid that is insufficient. Here i have grounded the motor to the head and the transmission to the frame rail, i believe this should be sufficient seing how i used 4-ga wire and stripped the paint from all surfaces that were getting contact.

I failed electronics class in high-school so i need some other peoples opinions.

edit:
some pictures might help.





edit again: where is that "you suck at the internet" picture.

[Modified by Plan B, 8:35 AM 1/8/2003]


[Modified by Plan B, 8:36 AM 1/8/2003]
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Old Jan 8, 2003 | 05:11 AM
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Default Re: Engine Ground Theory (Plan B)

There are many "earthing kits" out there. It's nothing you can't make on your own. Just a few wires and crimps. I would suggest to also connect the front right side of the valve cover to the front rad support. The earthing kits also have wires that come off of the intake mani and go to the ground on the thermostat. Some people swear by them, and I guess that it could make / free up a few hp. Honda does a good job with grounds from the factory so I don't think that it's really nessary.
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Old Jan 8, 2003 | 05:18 AM
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Default Re: Engine Ground Theory (SpooN Man)

But what logic is there to grounding the valve cover? It has not function but to keep oil from splashing on to your hood and is fully insulated from the head.
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Old Jan 8, 2003 | 06:47 AM
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Default Re: Engine Ground Theory (Plan B)

and is fully insulated from the head.
not when you ground it correctly.
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Old Jan 8, 2003 | 07:02 AM
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Default Re: Engine Ground Theory (Doctor CorteZ)

Tell me why you ground the valve cover.

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Old Jan 8, 2003 | 08:17 AM
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Default Re: Engine Ground Theory (Plan B)

you ground the stud in the head , it happens to hold the valve cover on also.
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Old Jan 8, 2003 | 08:24 AM
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Default Re: Engine Ground Theory (Doctor CorteZ)

That's what i'm trying to say. The only reason people hook grounds to the valve cover stud is because honda does that.

You can get a much stronger ground off the head itself.

They're car makers not rocket scientists. There is always room for improvement.
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Old Jan 8, 2003 | 08:50 AM
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Default Re: Engine Ground Theory (Plan B)

That's what i'm trying to say. The only reason people hook grounds to the valve cover stud is because honda does that.
check ground points on the head and on the stud , I bet the resistance is nearly identical.

I would be more concerned with grounding other things properly.
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Old Jan 8, 2003 | 10:31 PM
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Default Re: Engine Ground Theory (Doctor CorteZ)

the valve cover is supposed to remain electrictly neutral. no ground. no 12v. think about it. the rubber grommets on the VC washers keep the factory ground isolated. Plan B-- youre right. the valvecover isnt supposed to be grounded. Honda quit doing that in 90 on tegs and 92 on civics.

I would be more concerned with grounding other things properly.
you do know that the spark plugs are grounded through that ground, right?? i would say that is pretty damn important. the spark an all.



[Modified by 22lbGS-R, 7:42 AM 1/9/2003]
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Old Jan 8, 2003 | 11:39 PM
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Default Re: Engine Ground Theory (22lbGS-R)

I was just going to say that!
If you have an aftermarket ignition, and have an external coil with modified cap...
Touch the terminal on the cap (about where the rubber boot ends on the terminal without touching anything else) that receives the signal from the coil. You will get a mild sting. Now, touch that same terminnal while touching the valve cover....ZZZAAAPPP!!!
It is important to have a ground to that valve cover.
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Old Jan 9, 2003 | 05:25 AM
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Default Re: Engine Ground Theory (22lbGS-R)

the valvecover isnt supposed to be grounded. Honda quit doing that in 90 on tegs and 92 on civics.
thats the dumbest thing I've ever heard.

and completely wrong.
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Old Jan 9, 2003 | 05:31 AM
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Default Re: Engine Ground Theory (Doctor CorteZ)

the valvecover isnt supposed to be grounded. Honda quit doing that in 90 on tegs and 92 on civics.


thats the dumbest thing I've ever heard.

and completely wrong.
Yup all b motors are grounded to the front right post. I have no idea about sohc's but I bet they are too
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Old Jan 9, 2003 | 05:57 AM
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Default Re: Engine Ground Theory (Plan B)

if you REAALLLLlLly care about NOT using "where honda grounds", u can test for ground somewhere else with a VOHM/multimeter...not that it matters at all since "ground" is the same...
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Old Jan 9, 2003 | 06:01 AM
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Default Re: Engine Ground Theory (MrJasey)

Nobody has given me a good reason to ground the valvecover yet.

And btw: honda valve covers are grounded to the stud, definetly not the valvecover.

Hence, a much more attractive, much thicker ground on the head is a functional and attractive alternative to stud grounding.
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Old Jan 9, 2003 | 06:06 AM
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Default Re: Engine Ground Theory (Plan B)

Nobody has given me a good reason to ground the valvecover yet.

And btw: honda valve covers are grounded to the stud, definetly not the valvecover.

Hence, a much more attractive, much thicker ground on the head is a functional and attractive alternative to stud grounding.
On my '90 Si, the ground cable under the valve cover stud has a pigtail on it that runs to another 10mm bolt threaded into the valve cover. So in my case, the valve cover itself is electrically grounded.
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Old Jan 9, 2003 | 06:22 AM
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Default Re: Engine Ground Theory (Plan B)

Nobody has given me a good reason to ground the valvecover yet.
I already told you , the OEM ground spot happens to ALSO hold the valve cover on.
the valve cover doesnt need to be grounded at all.
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Old Jan 9, 2003 | 06:25 AM
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Default Re: Engine Ground Theory (Plan B)

Just ground the **** where ever you want to. Since you claim you know more about cars and engines than Honda. Like they dont know what there doing.
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Old Jan 9, 2003 | 06:27 AM
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Default Re: Engine Ground Theory (jdmhatch)

Ugh, Lemmings.
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Old Jan 9, 2003 | 06:29 AM
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Default Re: Engine Ground Theory (Perfectionist)

Good discussion.

So what would someone notice if they grounded just the VC with the far right bolt (by the cam gears) and not the stud? Any negative effects?


[Modified by g_man80, 10:32 AM 1/9/2003]
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Old Jan 9, 2003 | 07:20 AM
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Default Re: Engine Ground Theory (g_man80)

So what would someone notice if they grounded just the VC with the far right bolt (by the cam gears) and not the stud? Any negative effects?
yes.
the head wouldnt be grounded just the valve cover , and the valve cover doesnt really need to be grounded at all , like I said in the above post you ground the HEAD on the stud that happens to ALSO hold down the valve cover.

how many times must I make this point ?
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Old Jan 9, 2003 | 07:32 AM
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Default Re: Engine Ground Theory (Doctor CorteZ)

I ground from the stock location. When I switched straight to the head I felt no difference. So I put it back where it belongs. Makes no difference.
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Old Jan 9, 2003 | 07:37 AM
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Default Re: Engine Ground Theory (jdmhatch)

Just ground the **** where ever you want to. Since you claim you know more about cars and engines than Honda. Like they dont know what there doing.
That's most likely not the case. On my WRX, grounding is somewhat substandard from the factory. It's just like putting an intake on your car. Are you saying that the factory engineers are "dumb" in that aspect also? The car "works", but you're just trying to make it "work" more to your liking
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Old Jan 9, 2003 | 07:58 AM
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Default Re: Engine Ground Theory (Doctor CorteZ)

So what would someone notice if they grounded just the VC with the far right bolt (by the cam gears) and not the stud? Any negative effects?


yes.
the head wouldnt be grounded just the valve cover , and the valve cover doesnt really need to be grounded at all , like I said in the above post you ground the HEAD on the stud that happens to ALSO hold down the valve cover.

how many times must I make this point ?


This is where I put the ground on my VC. It was the factory location and is not on a stud. So Honda is wrong or just not putting the ground in the best location?
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Old Jan 9, 2003 | 08:02 AM
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Default Re: Engine Ground Theory (nsxmatt)

This is where I put the ground on my VC. It was the factory location and is not on a stud. So Honda is wrong or just not putting the ground in the best location?
thats not the correct factory ground point.
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Old Jan 9, 2003 | 09:03 AM
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Default Re: Engine Ground Theory (SpooN Man)

yeah i can see where you grounded all those grounds....nice clear pictures!!!
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