Engine to Chassis Ground - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

camguynj · 03-07-2018, 09:32 AM

Is there an engine block to chassis ground? If so where is it? Or is the only engine block ground connected to the negative battery post in the trunk ...if so where is that on the block?

hou30guy · 03-07-2018, 09:36 AM

Make one using 4 or 0 guage wire, alternator to frame, alternator to + battery and - battery to frame, its call the big 3

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xc_SS/RS · 03-07-2018, 01:14 PM

the first is a large wire on the passenger side of the engine, it should be attached at the front of the head and near the abs block. the second is a tiny wire on the drivers side of the engine near the coolant temp sensor

Bo White · 03-07-2018, 02:09 PM

I added one from the stud on the pass cylinder head to the frame where the sway bar bushing is on the frame.

marklsx · 03-07-2018, 06:59 PM

Last weekend I added a ground between the driver's side front of the head and the chassis ground bolt up close to the airbox/inner fender.

The biggest battery style connectors I could find in a store were 2 gauge at Autozone, and I got 2 gauge insulated copper wire at Lowe's.

I also removed the big ground wire between the front passenger head and the chassis, and I wire brushed all the connector surfaces.

Also disassembled the positive junction block on the driver's side (jumper post thing) and wire brushed all of those connector surfaces.

I did all this to try to help hot starts. It's been cold so I haven't had a good test yet.

camguynj · 03-07-2018, 07:43 PM

Quote:

Originally Posted by Bo White

I added one from the stud on the pass cylinder head to the frame where the sway bar bushing is on the frame.

Do you recall what gauge cable you used? Also was that a 2nd engine to chassis ground in addition to the engine to chassis ground that marklsx mentions in the above post ^^^ "I also removed the big ground wire between the front passenger head and the chassis, and I wire brushed all the connector surfaces".

xc_SS/RS · 03-07-2018, 07:55 PM

Quote:

Originally Posted by marklsx

Last weekend I added a ground between the driver's side front of the head and the chassis ground bolt up close to the airbox/inner fender.

The biggest battery style connectors I could find in a store were 2 gauge at Autozone, and I got 2 gauge insulated copper wire at Lowe's.

I also removed the big ground wire between the front passenger head and the chassis, and I wire brushed all the connector surfaces.

Also disassembled the positive junction block on the driver's side (jumper post thing) and wire brushed all of those connector surfaces.

I did all this to try to help hot starts. It's been cold so I haven't had a good test yet.

if you still get them do the same thing with the connection at the starter. mine was nasty and so far i rarely have a hard start. i cleaned my grounds up as well. i'll try adding another ground for shiggles

OP you can run 4 gauge wire. at the lengths you will be running you won't need anything larger than 4 gauge

camguynj · 03-07-2018, 08:44 PM

Quote:

Originally Posted by xc_SS/RS

OP you can run 4 gauge wire. at the lengths you will be running you won't need anything larger than 4 gauge

That's what I was thinking. Just want to make sure not to use something smaller than what guage the factory passenger side engine to chassis ground is?

Update - the ground on the passenger engine side does not go to the chassis. It is actually the ground connection for a harness cluster.

xc_SS/RS · 03-07-2018, 08:49 PM

Quote:

Originally Posted by camguynj

That's what I was thinking. Just want to make sure not to use something smaller than what guage the factory passenger side engine to chassis ground is?

i'm not sure what the OEM wire size is, but it's either 4 gauge or 2 gauge. i don't think you'll have an issue with either size

frankwjr · 03-07-2018, 10:56 PM

replacement wire for arc welders is the correct size if I am not mistaken..and cheaper..

Bo White · 03-08-2018, 02:46 PM

Quote:

Originally Posted by camguynj

Do you recall what gauge cable you used? Also was that a 2nd engine to chassis ground in addition to the engine to chassis ground that marklsx mentions in the above post ^^^ "I also removed the big ground wire between the front passenger head and the chassis, and I wire brushed all the connector surfaces".

Yes I still have all the factory grounds. It was just a 24" ground cable I bought at the parts store with eyelets on each end so I could bolt it down. I'm going to add one to the battery too.

hou30guy · 03-08-2018, 03:01 PM

That welder wire is the best, has more strains and thick as a mf

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camguynj · 03-08-2018, 04:06 PM

Does anyone know if the battery negative cable is attached directly onto the engine block? If so where ? Or is the battery grounded via the trunk frame?

hou30guy · 03-08-2018, 04:30 PM

Trunk frame

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03-07-2018, 09:32 AM	#1
camguynj Drives: '13 SS/RS LS3 BRM Cammed NPP Join Date: Jan 2013 Location: NJ Posts: 3,812 View My Garage	Engine to Chassis Ground Is there an engine block to chassis ground? If so where is it? Or is the only engine block ground connected to the negative battery post in the trunk ...if so where is that on the block? Last edited by camguynj; 03-07-2018 at 04:35 PM.

03-07-2018, 01:14 PM	#3
xc_SS/RS Drives: 2010 Camaro SS/RS Join Date: Mar 2014 Location: somewhere in MD Posts: 4,883	the first is a large wire on the passenger side of the engine, it should be attached at the front of the head and near the abs block. the second is a tiny wire on the drivers side of the engine near the coolant temp sensor __________________ 2010 2SS/RS Z/28 intake, NW, FAST 102, speed engineering LT's, some exhaust, ATI -10% pulley, GM flex fuel injectors, DSX flex fuel sensor, MGW shifter, HP Tuners, some suspension work, stickers and a little weight loss. 12.63 @113.53

03-07-2018, 02:09 PM	#4
Bo White Drives: 2015 Summit White 2SS 1LE Join Date: Feb 2012 Location: Vance Alabama Posts: 8,019	I added one from the stud on the pass cylinder head to the frame where the sway bar bushing is on the frame. __________________ Retired wanna be cylinder head porter 2015 2SS 1LE Clutch reservoir, Vararam DRX, ported TB, TSP 2" headers, MGW shifter Totalled: 2010 1SS Wilkes Performance/Eagle 416 shortblock, TSP custom valvetrain, PRC 260 heads, Edelbrock Pro Flo 102, th400 swap, 8" PTC 5500 stall= 535/435 at the wheels tuned Gen 3 Performance and Dyno 10.97 @ 124 full weight in 3100 DA CamaroFest X

03-07-2018, 06:59 PM	#5
marklsx Drives: 2014 Camaro 1SS Join Date: Jun 2010 Location: MA Posts: 103	Last weekend I added a ground between the driver's side front of the head and the chassis ground bolt up close to the airbox/inner fender. The biggest battery style connectors I could find in a store were 2 gauge at Autozone, and I got 2 gauge insulated copper wire at Lowe's. I also removed the big ground wire between the front passenger head and the chassis, and I wire brushed all the connector surfaces. Also disassembled the positive junction block on the driver's side (jumper post thing) and wire brushed all of those connector surfaces. I did all this to try to help hot starts. It's been cold so I haven't had a good test yet. __________________ 2014 1SS - BTR Stg3, GMPP CNC Heads, Kooks LTs & cats, Magnaflow 2.5" Street w/Res X, Z28 CAI

03-07-2018, 10:56 PM	#10
frankwjr Drives: 2010 SS 2SS M6 Join Date: Aug 2016 Location: Smithsburg, Md. Posts: 2,445	replacement wire for arc welders is the correct size if I am not mistaken..and cheaper.. __________________ 2010 SS 2SS M6 - Tune by RDP dynoSteve!(Woot) - Daily Driver - *150K!* - All work by me...

03-07-2018, 09:36 AM	#2
hou30guy Drives: 2011 convertible 2ss/rs Join Date: Sep 2015 Location: Houston Posts: 971	Make one using 4 or 0 guage wire, alternator to frame, alternator to + battery and - battery to frame, its call the big 3 Sent from my SM-N950U using Tapatalk

03-08-2018, 03:01 PM	#12
hou30guy Drives: 2011 convertible 2ss/rs Join Date: Sep 2015 Location: Houston Posts: 971	That welder wire is the best, has more strains and thick as a mf Sent from my SM-N950U using Tapatalk

03-08-2018, 04:06 PM	#13
camguynj Drives: '13 SS/RS LS3 BRM Cammed NPP Join Date: Jan 2013 Location: NJ Posts: 3,812 View My Garage	Does anyone know if the battery negative cable is attached directly onto the engine block? If so where ? Or is the battery grounded via the trunk frame?

03-08-2018, 04:30 PM	#14
hou30guy Drives: 2011 convertible 2ss/rs Join Date: Sep 2015 Location: Houston Posts: 971	Trunk frame Sent from my SM-N950U using Tapatalk