Slow Turn over No start?

Ok
So I done an engine swap and the new engine is not turning over properly.
I have ruled out the Starter and Battery. I have Checked the grounds and the seem to be fine (not saying grounds are not the cause Im looking for more things that I could check. I hooked jumpers to the negative to one of the head bolts made no difference.

Starter-Tested I put on my spare known good starter
Battery- Tested I put in my spare known good battery
Grounds- Still looking into this. Not ruling this out.

Symptoms.
1. Turns over slow. Hit one time but didn't actually start
2. Negative Terminal get really hot. (makes me think ground?)

I am going to install new cables this weekend when I get a chance to work on it more.

Wanting more ideas of things that I should check?
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Either a short or a problem in the motor itself?

"Negative Terminal get really hot. (makes me think ground?)"

That is not a ground issue, but a short issue or too hard to turn over motor overloading the starter.

Pull your plugs out an then crank her over hot neg is to much amps running threw it

sneakyjap96 said:

Pull your plugs out an then crank her over hot neg is to much amps running threw it

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I will try this tomorrow. I planned on re plugin it anyways.

Ecomike said:

That is not a ground issue, but a short issue or too hard to turn over motor overloading the starter.

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not sure I agree with the determination that it's not a ground issue-- with resistance comes heat. A bad connection at the neg. terminal will cause high heat when under high amperage load.

I'd disconnect and CLEAN both positive and negative cables and terminal ends before I ruled out any bad grounds or connections. There are only a few locations that the start circuit could be grounding during "start" mode but not any other time. With a known good battery and a proven good starter, you've eliminated half of the probable locations for the short.

Shorty said:

not sure I agree with the determination that it's not a ground issue-- with resistance comes heat. A bad connection at the neg. terminal will cause high heat when under high amperage load.

I'd disconnect and CLEAN both positive and negative cables and terminal ends before I ruled out any bad grounds or connections. There are only a few locations that the start circuit could be grounding during "start" mode but not any other time. With a known good battery and a proven good starter, you've eliminated half of the probable locations for the short.

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Thanks. I am picking up new Positive and Negative cables today. I will install them and give it a go. A thought That I had that could be a possibility is that I somehow swapped the grounds for block and Alternator. I figure this is a possibility since the ground would be smaller could be causing the issue. I will update later with more information.

I got her going today finally. I believe the issue was dry cylinders. I put a little A/T fluid in all of them and let them sit for a while. Then I bumped it a few times. And that issue was solved.