When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
From: I tend to be leery of any guy who doesn't own a chainsaw or a handgun.
Rear spring spacer/insulator question.
I'm in the process of adapting a C4 batwing to my '69 to take a few more pounds off the car. Everything's going reasonably smooth, but I don't have the spacers and insulators that go between the C4 spring and the batwing spring mounts. The spacers are easy enough to fabricate out of aluminum, but I'm unclear what Chevy used for the insulators. Stainless steel shims would slow down the heat transfer, but for comparison reasons I'm curious what the stock insulators were made of. Anyone know?
From: I tend to be leery of any guy who doesn't own a chainsaw or a handgun.
Originally Posted by jv9999
Aluminum
Well, if that's true, I'm not following Chevy's logic of calling one piece, in an aluminum stack, a spacer, and calling another aluminum piece in that stack an insulator.
I've only ever seen them referred to as being "fiber" - I've only replaced two rear springs and never paid attention to construction, only put things back where they came from.
You might try Pat "see4parts" and just mention you're wanting the insulator and not the spacers OR if you're doing a scratch install ask him for an assortment. He sells his stuff very realistically and I'd think he could certainly accommodate you.
The insulator in question isn't included in your image. Only the variable thickness is mentioned because the insulator is a fixed dimension and there's no alternatives.
I always thought the insulator is the rubber piece molded around the spring. It has the two extrusions on both sides that hold the spacers in place. That is shown in the diagram.
If there's something not in that diagram, my car doesn't have them.
From: I tend to be leery of any guy who doesn't own a chainsaw or a handgun.
Regarding the above picture, my service manual shows a very similar picture but also includes a drawing of the insulator positioned just above the spacers.
I always thought the insulator is the rubber piece molded around the spring. It has the two extrusions on both sides that hold the spacers in place. That is shown in the diagram.
If there's something not in that diagram, my car doesn't have them.
I think that's just the very thin shim. The one that's the thickness of the extrusions on the other ones. It lets it move a little on the top part of the mount. Maybe they call it an isolator.
I recently replaced spring on my car. The spring had a molded piece of rubber attached to it where the spacers go in between the spring and the batwing. The spacers are aluminum. I am not sure why heat transfer has anything to do with this. I guess the molded rubber is there just to take up vibration or dampening.