Loose Battery Clamp... - Team Camaro Tech
Electrical & Wiring Troubleshooting electrical.

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post #1 of 8 (permalink) Old Jul 28th, 18, 04:53 AM Thread Starter
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Loose Battery Clamp...

I have a yellow top D34 Optima Battery that I just got. After switching out the batteries, I was unable to tighten both positive and negative as good as I would like. Seems to be either the wrong clamp or maybe just old. Without getting the spring clamps ends. What are a good set and length needed?

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post #2 of 8 (permalink) Old Jul 28th, 18, 08:29 AM
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Re: Loose Battery Clamp...

If with the old battery the clamps were tight but now with the new one, they are loose, or not able to be tightened like they were before, could the the posts have been machined or molded smaller or on the bottom side of a tolerance ?.

What kind of ends are on your cables now ?. The reason I'm asking is sometimes installing car audio I have used some aftermarket gold plated brass replacement cable ends and they sometimes did not tighten like I would like as they were either poorly made or due to the material they were made out of were a lot harder to try and shrink the hole by tightening a set screw or allen screw on them. Also on these brass type terminal ends, once tightened they don't spring back to how they were when new and sometimes I have had to take the bolt out to spread the clamp open some and then reassemble things.

Keep in mind too, that the battery posts are of two different dimensions to where if the wrong terminal end is used on a particular post the terminal may bottom out and not be able to be tightened or the hole shrunk anymore limiting the clamping force onto the post.

Touching on the spring eye end cables, I bought some for my 68 Chevy II Nova as well as a new battery and have had them on and off a few times but on those they are limited to the clamping force and if opened up too far even once, they will not spring back to where they were before creating now a looser connection. Luckily the battery posts I have seen are tapered some and this might help if the clamp is lowered onto the post as it then is larger and might allow for more clamping force off of the battery cable ends if they too are lowered onto the posts.

Jim
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post #3 of 8 (permalink) Old Jul 28th, 18, 08:46 AM
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Sounds goofy, but I have seen battery post sleeves. They slide over the battery post to take up the difference in size. I have seen them at Advance auto. I have never used them, but if they make them, it must not be that uncommon.

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post #4 of 8 (permalink) Old Jul 28th, 18, 09:26 AM
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Re: Loose Battery Clamp...

I use these from Taylor wire to avoid these issues. I also use a stainless steel 3/8-16x3/4 inch hex cap to secure it and torque it to the specs listed in the Service Manual which specifies the negative terminal should be torqued to 12 ft lbs and the positive terminal to 71 in lbs.



This terminal offers a better electrical connection, and if you had a lead acid battery instead of a sealed gel cell, it prevents corrosion.

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post #5 of 8 (permalink) Old Jul 28th, 18, 10:22 AM
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Re: Loose Battery Clamp...

Moving this tread to electrical from the paid sponsor "Vintage Car LED Headlights" vendor forum.

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post #6 of 8 (permalink) Old Jul 28th, 18, 10:24 AM Thread Starter
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Re: Loose Battery Clamp...

I just ordered some new cables for both + & -. So I'll keep you posted on how the fit is when I get them.

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post #7 of 8 (permalink) Old Jul 28th, 18, 12:31 PM
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Re: Loose Battery Clamp...

Quote:
Originally Posted by Wigman87 View Post
I just ordered some new cables for both + & -. So I'll keep you posted on how the fit is when I get them.
We also like a lot of before and after pictures so post them up also.

Jim

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post #8 of 8 (permalink) Old Jul 28th, 18, 12:45 PM
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Re: Loose Battery Clamp...

Quote:
Originally Posted by X-77 keith View Post
Sounds goofy, but I have seen battery post sleeves. They slide over the battery post to take up the difference in size. I have seen them at Advance auto. I have never used them, but if they make them, it must not be that uncommon.
no it don't sound goofy! I make my own out of sheet lead. you can actually repair a battery post by trimming of the melted/damaged portion of the post to a flat surface and adding a sheet metal screw into the existing post. then take a piece or cardboard and wrap it around the existing post. then have something you can melt wheel weights in and just pour the hot lead in the mold you made and immediately pour some water on the cardboard
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