Upgrade alternator ground when doing big3?

[phenryiv1 10+ year member]

I was purchasing some crap to do the big 3 and while the shop owner did not know the Big 3 by name, he knew the 3 wires to upgrade, BUT he said that he always upgrades the Alt. GROUND as well as the Alt 12+. I had never heard that, and it certainly cannot hurt, but is it necessary?

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[jmanpc 5,000+ posts]

um... it's grounded to the engine block.... which it's bolted to...

Thats the purpose of the engine block to frame wire.

 

[phenryiv1 10+ year member]

um... it's grounded to the engine block.... which it's bolted to...
Thats the purpose of the engine block to frame wire.

I was not sure on that. It looks like my puny alternator has a "dedicated" ground wire, which is what he was pointing to. I never thought abotu the fact that the GIANT METAL SLAB that it attaches to could serve as a ground (provided that that metal is well-grounded in its own right).

Thanks.