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TomoHawk

Battery Frame Insulator?

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I was checkin out the MSA website (Z Car Parts.com -- Motorsport Auto -- Home) for fire extinguisher stuff, and I saw a mention of something called a "Battery Frame Insulator." It's supposed to go between the frame and the firewall, where the frame bolts to the firewall. Apparently, its job is to eliminate the frame from rubbing or scratching the firewall.

Would this be a useful part? Would you pay $20 for a rubber spacer? It's just a chunk pf rubber with a slit for the battery frame handle and a slot for the bolt, you'd also need a longer bolt. Couldn't you just substitute a rubber spacer you make yourself?

Motorsport! Battery Frame Insulator, 70-78 240Z-260Z-280Z - The Z Store! Nissan-Datsun 240Z-260Z-280Z-280ZX-300ZX(Z31/Z32)-350Z-370Z Parts

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You could buy the same item from Banzai Motorworks for $13,and, for another couple bucks, get the correct machine screw.

I guess you have to figure out if it is part of the vision you have for your car.

I put one on my car because it was an original part for a factory correct restoration.

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You need to isolate the bolt from the frame well as isolating the frame from the car.

The long threaded hold down rods can also short the frame to the body so isolate carefully and wisely.

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Blue, I have always assumed that the purpose of this rubber insulator was to cushion the battery frame/firewall surfaces, and prevent damage

to these surfaces. The long J-Rod that secures the front side of the battery frame to the battery tray doesn't have any isolators, so, I never

thought of this rubber insulator as something meant to electrically insolate the battery frame from the body.

The bolt sold at Banzai has a large flat washer to help hold the insulator firmly in place, and this rubber insulator is partially split so as to fit over,

and protect, both sides of the battery frame mounting tab.

Let me know what I am missing as I don't mean to mis-interpret what you meant.

Dan

Edited by AZ-240z

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I am probably wrong. I had assumed the fact the terminals come close to the frame and that it was called an insulator it was an electrical insulator.

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Blue, you could put all I know about electrics on the head of a pin. Most of the time, my responses to these threads are more a question looking for

clarity. The stock positive battery cable clamp had a plastic cover protecting this cable terminal in the event the battery came loose and the positive post

came in contact with the inner fender.

Dan

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I put about 4 layers of electrical tape on the frame under both terminals and used those plastic terminal covers, but that looks better. No unintentional welding.

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Ah, but there's never an old inner tube around these days. :)

Does the DIY store have 1cm thick sheets of rubber?

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My tire store gave me one years ago. I bet if you ask your tire store for an unusable one, they would give it to you. I've made numerous things from that tube and still have most of it left. :)

Bonzi Lon

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I'm a bike rider/racer so I have lots of old tubes and use them for all kinds of things on the car. I just used one for the bumper to body insulator on my 510 wagon.

Chuck

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Folks, please let me use this thread to possibly put this subject to rest. Datsun called it a Cushion Battery and the part # was 24480-E4600. It has been No Longer Available for more than 25 years. It is my opinion that Nissan decided to use such a thing as they simply didn't like the idea of 2 metal surfaces making contact.  A little like the 240 rear bumper end brackets. When Nissan started the Z Store program they commissioned Banzai Motorworks to reproduce it and a whole slew of NLA parts for use in the program. They stole/hired a quality control engineer from Boeing to make sure that what they bought from Banzai was correct in every way. Wonder what became of her? Although the picture is a bit unclear - I hate to take such a rare part out of the original bag -  a New Old Stock cushion is on the left and the reproduction on the right. Be careful - there are those who have probably never seen the real deal selling what they claim is an accurate reproduction - beware. The cushion and battery frame were held to the firewall by the fasteners shown in the second picture. They are a 6mm x 23mm long Phillips hex bolt with a captive lock washer in clear zinc. The flat washer is  6mm with an OD of 18mm in yellow zinc.     Cheers

IMG_1949.JPG

IMG_1950.JPG

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