Ignition wiring ground

BimPhys · 06-26-2023, 05:05 AM

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Hey all, have recently replaced my valve cover gasket and noticed that one of the grounds coming from the ignition wiring to the bolt on the valve cover is severely corroded and has snapped in half. It’s more than likely been this way for years and I’ve never known, my car has ran completely fine.

What is the possible implications of this ground being broken ??
Also what is the main use of this ground ?
Thanks
(I know the photo I linked is not mine)

bimmerisalwaysbroken · 06-28-2023, 04:27 AM

They're coil grounds without them the car will run rough and misfire
If one has broken it will just use the other ground
The bolts are pretty soft so just hammer a flathead into it and spin in out.

06-26-2023, 05:05 AM	#1
BimPhys New Member 0 Rep 6 Posts Drives: E90 325I Join Date: Nov 2022 Location: New Zealand iTrader: (0)	Ignition wiring ground Hey all, have recently replaced my valve cover gasket and noticed that one of the grounds coming from the ignition wiring to the bolt on the valve cover is severely corroded and has snapped in half. It’s more than likely been this way for years and I’ve never known, my car has ran completely fine. What is the possible implications of this ground being broken ?? Also what is the main use of this ground ? Thanks (I know the photo I linked is not mine) Attached Images
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06-28-2023, 04:27 AM	#2
bimmerisalwaysbroken Waiting for a tow truck 21 Rep 90 Posts Drives: 2005 E90 330i Join Date: Apr 2021 Location: Australia iTrader: (0)	They're coil grounds without them the car will run rough and misfire If one has broken it will just use the other ground The bolts are pretty soft so just hammer a flathead into it and spin in out.
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