Battery to Alternator Bracket Ground

[garzas23]

I replaced the stock alternator bracket with a chrome bracket for looks. The new chrome bracket does NOT have a hole for the ground from the battery. Where is the next best place for the ground? The Frame?

 

[firebane]

Engine block preferred.

 

[RetroC10Sport]

Exhaust manifold bolt works as well.

 

[PrairieDrifter]

I would go to the front of the head on the passenger side. Manifold bolt is fine, but long term probably not the greatest, we all know how rusty manifold bolts get lol.

 

[rich weyand]

It MUST be to the engine in order to provide a ground for the starter. If you connect it to the frame, you won't be able to turn it over.

An accessory bolt hole is good, like under the head of the bolt that connects the alternator bracket to the engine. Make sure to dress the wire out of the way of the alternator belt and strap it there. You can also use an intake manifold bolt. Exhaust manifold bolt is probably not the best.

 

[RetroC10Sport]

GM put it on the exhaust manifold factory on most cars and trucks, all my S10s were that way. But then again, that could explain a lot.

 

[PrairieDrifter]

GM put it on the exhaust manifold factory on most cars and trucks, all my S10s were that way. But then again, that could explain a lot.

I honestly can say I have never seen a ground go to a manifold bolt lol. Which manifold bolt was the ground on for the s10's you had? The one in the very front im assuming

 

[RetroC10Sport]

Yes, the front bolt.

 

[garzas23]

Thanks for all the replys. I ran the ground to the block successfully. So far so good, but is it common for the idle to jump up when the brakes are applied while parked? Is that a sign of a potential leaky brake booster?

 

[chengny]

Is that a sign of a potential leaky brake booster?

Quite possible. To verify a failed diaphragm either pinch the vacuum hose with a pair of vice-grips (or disconnect & plug it). You will have reduced brake assist during the test but if the engine idle remains stable, the booster is shot.

I think you can eliminate a leaky hose or a failed check valve. If either of those were the cause, you would be racing all the time - not just when the brakes are on.