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battery earth cable
Posted: Mon Jun 09, 2025 10:03 am
by garyinwestoz
am am wondering does it matter if the battery earth cable is not attached directly to the block eaarth cable liekt eh OEM on is.
p/n 12 42 1 286 746
would it be okay to just use a separate braided cable until a new one is acquired?
Re: battery earth cable
Posted: Mon Jun 09, 2025 11:05 pm
by Mike W.
I'm a little unclear on what exactly you intend to do. The negative/ground from the battery to the block has to carry a lot of current on start. So whatever you do, it has to be able to carry a bunch of current, at least briefly. IIRC E28s just ran a little negative cable to the body, then a ground strap or two between the body and the block, so direct isn't needed, but a good sized cable/strap is. It appears E28s used a 10, metric cross section I think, for the positive cable. I'm sure you could get away with less than that, but larger than the 4 that runs from the alternator.