C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Rear spring spacer/insulator question.

Thread Tools
 
Search this Thread
 
Old Sep 19, 2015 | 08:12 PM
  #1  
69427's Avatar
69427
Thread Starter
Tech Contributor
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Jun 2004
Posts: 20,910
Likes: 962
From: I tend to be leery of any guy who doesn't own a chainsaw or a handgun.
Default 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?

Thanks for any help.
Reply
Old Sep 19, 2015 | 09:52 PM
  #2  
jv9999's Avatar
jv9999
Melting Slicks
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Jan 2014
Posts: 2,192
Likes: 381
From: Lunenburg MA
Default

Aluminum
Reply
Old Sep 19, 2015 | 11:04 PM
  #3  
69427's Avatar
69427
Thread Starter
Tech Contributor
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Jun 2004
Posts: 20,910
Likes: 962
From: I tend to be leery of any guy who doesn't own a chainsaw or a handgun.
Default

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.

Something just doesn't make sense here.
Reply
Old Sep 20, 2015 | 04:33 AM
  #4  
WVZR-1's Avatar
WVZR-1
Team Owner
20 Year Member
Veteran: Army
Active Streak: 30 Days
Liked
 
Joined: Sep 2003
Posts: 25,394
Likes: 2,741
Default

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.

Locals to you?
Reply
Old Sep 20, 2015 | 10:13 AM
  #5  
jv9999's Avatar
jv9999
Melting Slicks
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Jan 2014
Posts: 2,192
Likes: 381
From: Lunenburg MA
Default

Reply
Old Sep 20, 2015 | 10:21 AM
  #6  
WVZR-1's Avatar
WVZR-1
Team Owner
20 Year Member
Veteran: Army
Active Streak: 30 Days
Liked
 
Joined: Sep 2003
Posts: 25,394
Likes: 2,741
Default

Originally Posted by jv9999
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.
Reply
Old Sep 20, 2015 | 10:34 AM
  #7  
jv9999's Avatar
jv9999
Melting Slicks
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Jan 2014
Posts: 2,192
Likes: 381
From: Lunenburg MA
Default

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.
Reply
Old Sep 20, 2015 | 10:35 AM
  #8  
69427's Avatar
69427
Thread Starter
Tech Contributor
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Jun 2004
Posts: 20,910
Likes: 962
From: I tend to be leery of any guy who doesn't own a chainsaw or a handgun.
Default

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.
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

10 Ugly Corvettes That We Still Kinda Love

 Joe Kucinski
story-1

Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

 Brett Foote
story-2

10 Things Every Corvette Owner Needs (2026 Edition)

 Michael S. Palmer
story-3

8 Most "Only Corvette Owners Understand" Quirks and Problems

 Pouria Savadkouei
story-4

10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

 Joe Kucinski
story-5

How Much Horsepower Every Corvette Engine "LOST" in 1972

 Joe Kucinski
story-6

Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

 Michael S. Palmer
story-7

Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

 Joe Kucinski
story-8

150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

 Joe Kucinski
story-9

8 Coolest Corvette Pace Cars (and Replicas) of All Time

 Verdad Gallardo
Old Sep 20, 2015 | 10:39 AM
  #9  
WVZR-1's Avatar
WVZR-1
Team Owner
20 Year Member
Veteran: Army
Active Streak: 30 Days
Liked
 
Joined: Sep 2003
Posts: 25,394
Likes: 2,741
Default

Originally Posted by jv9999
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.
#7 in this image:

http://www.wholesalegmpartsonline.co...riveLine=11463
Reply
Old Sep 20, 2015 | 01:17 PM
  #10  
jv9999's Avatar
jv9999
Melting Slicks
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Jan 2014
Posts: 2,192
Likes: 381
From: Lunenburg MA
Default

Originally Posted by WVZR-1
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.
Reply
Old Sep 20, 2015 | 10:57 PM
  #11  
chadk's Avatar
chadk
Racer
 
Joined: Aug 2014
Posts: 287
Likes: 9
From: Toledo
Default

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.
Reply

Get notified of new replies

To Rear spring spacer/insulator question.





All times are GMT -4. The time now is 09:51 PM.

story-0
10 Ugly Corvettes That We Still Kinda Love

Slideshow: 10 ugly Corvettes that we still kinda love.

By Joe Kucinski | 2026-06-03 10:34:17


VIEW MORE
story-1
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

A lot of money has changed hands at the online auction house over the years.

By Brett Foote | 2026-06-03 10:21:50


VIEW MORE
story-2
10 Things Every Corvette Owner Needs (2026 Edition)

Slideshow: 10 great gifts Corvette enthusiasts actually want for Father's Day!

By Michael S. Palmer | 2026-06-03 15:43:40


VIEW MORE
story-3
8 Most "Only Corvette Owners Understand" Quirks and Problems

Slideshow: These are the quirks, annoyances, and oddly lovable problems that every Corvette owner eventually learns to live with.

By Pouria Savadkouei | 2026-05-28 09:31:39


VIEW MORE
story-4
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

Slideshow: 10 reasons why the C6 Z06 is still a performance benchmark after 20 years.

By Joe Kucinski | 2026-05-27 17:20:09


VIEW MORE
story-5
How Much Horsepower Every Corvette Engine "LOST" in 1972

Slideshow: How much horsepower every Corvette engine lost in 1972.

By Joe Kucinski | 2026-05-27 16:54:53


VIEW MORE
story-6
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE
story-7
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-8
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-9
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE