C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
Sponsored by:
Sponsored by:

#4 Body Mount Question

Thread Tools
 
Search this Thread
 
Old Feb 8, 2008 | 11:09 PM
  #1  
wjsullivan's Avatar
wjsullivan
Thread Starter
Pro
10 Year Member
 
Joined: May 2007
Posts: 593
Likes: 0
From: Warrenville IL
Default #4 Body Mount Question

So far my frame has been very good in terms of rust but the birdcage has some 'opportunity' areas. I'm just getting started with replacing the body mounts and went to pull the #4 on the passenger side and encountered the following issues:
1 - After multiple days of the nut sitting in a pool of PB Blaster it still didn't budge and pulled through the fiberglass. The nut was rounded off significantly so the hole hasn't been enlarged very much and will hold sufficiently with a good size washer and after the replacement of the reinforcement.
2 - The mount on the frame is rusted out and needs to be replaced or patched.

Question:
Is it possible to fix the frame mount without pulling the body? There is some clearance, so I would say it could be patched. But I don't think it could be replaced as the rear section of the body is too close.

One issue is that I don't weld, so I have to find someone who can I can hire to do it.

Thoughts?
Reply
Old Feb 8, 2008 | 11:25 PM
  #2  
Scott Marzahl's Avatar
Scott Marzahl
Le Mans Master
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Apr 2005
Posts: 6,360
Likes: 429
From: Seattle Area WA
Default

You could either weld in a new #4 bracket or patch the old one. Not seeing how bad it is makes it hard to comment but it can be done with the body on.

If you have to, you can pop off the back splash shield and glue it back on when the job is done.

http://blog.scottsvettetalk.com/2007...nt-repair.aspx
Reply
Old Feb 9, 2008 | 01:01 AM
  #3  
chris73cpe's Avatar
chris73cpe
Pro
 
Joined: Aug 2005
Posts: 627
Likes: 1
From: Naperville IL
Default

It can definitely be done with the body on, but you will end up cutting/grinding/welding in a tight space. I called a few places to come out and weld mine for me, but they all wanted the same or more than I could by my own welder for...so now I have a welder. I did exactly what scott did and just replaced the top. One thing I'd recomend though is to drill the hole first. It's much easier on a drill press.
I also cut a steel plate to fit the inside of the nut well and welded a nut to that to replace the original captive nut.




Reply
Old Feb 9, 2008 | 01:05 AM
  #4  
Scott Marzahl's Avatar
Scott Marzahl
Le Mans Master
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Apr 2005
Posts: 6,360
Likes: 429
From: Seattle Area WA
Default

Yep, ditched the whole captive nut thing too, and just used a plate and nut like Chris.
Reply
Old Feb 9, 2008 | 07:51 AM
  #5  
redwingvette's Avatar
redwingvette
Safety Car
Supporting Lifetime
20 Year Member
Active Streak: 30 Days
Active Streak: 60 Days
Liked
 
Joined: Aug 2001
Posts: 3,686
Likes: 202
From: Waterford Mi
Default

Same here. I made a plate and welded the cage to it. Us babba's think a like.
Reply
Old Feb 9, 2008 | 10:17 AM
  #6  
wjsullivan's Avatar
wjsullivan
Thread Starter
Pro
10 Year Member
 
Joined: May 2007
Posts: 593
Likes: 0
From: Warrenville IL
Default

chris73cpe or Scott Marzahl what thickness sheet metal did you use?

Is this something that is easy enough to weld that I could go over to the local harbor freight, pick up a welder an do myself? I see a thread in the General section asking about welders but I don't know much about them.
Reply
Old Feb 9, 2008 | 10:37 AM
  #7  
redwingvette's Avatar
redwingvette
Safety Car
Supporting Lifetime
20 Year Member
Active Streak: 30 Days
Active Streak: 60 Days
Liked
 
Joined: Aug 2001
Posts: 3,686
Likes: 202
From: Waterford Mi
Default

Here is what I used. The top pic is what I used for shims and the bottom pic is what I welded to the #1 and #4 frame mounts.

Last edited by redwingvette; Feb 9, 2008 at 10:39 AM.
Reply
Old Feb 9, 2008 | 10:58 AM
  #8  
Fonz69's Avatar
Fonz69
Pro
 
Joined: Jun 2007
Posts: 688
Likes: 1
From: Stevens Point WI
Default

Originally Posted by wjsullivan
chris73cpe or Scott Marzahl what thickness sheet metal did you use?

Is this something that is easy enough to weld that I could go over to the local harbor freight, pick up a welder an do myself? I see a thread in the General section asking about welders but I don't know much about them.
Go for it

Get a wirefeed welder that takes fluxcore so you do not need the gas and practice for a while on some scrap, you will be surprised how easy it is

I am sure the welder you buy will have some tips on how to weld or look up Miller welders and they have some good info on there site.

You could probably get an ok welder (for what you need) for under $300
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

5 Best & 5 Most Overrated Corvette Track Packages of All Time!

 Joe Kucinski
story-1

Every 2027 Corvette Engine Explained

 Joe Kucinski
story-2

Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette

 Verdad Gallardo
story-3

10 Ugly Corvettes That We Still Kinda Love

 Joe Kucinski
story-4

Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

 Brett Foote
story-5

10 Things Every Corvette Owner Needs (2026 Edition)

 Michael S. Palmer
story-6

8 Most "Only Corvette Owners Understand" Quirks and Problems

 Pouria Savadkouei
story-7

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

 Joe Kucinski
story-8

How Much Horsepower Every Corvette Engine "LOST" in 1972

 Joe Kucinski
story-9

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

 Michael S. Palmer
Old Feb 9, 2008 | 11:15 AM
  #9  
chris73cpe's Avatar
chris73cpe
Pro
 
Joined: Aug 2005
Posts: 627
Likes: 1
From: Naperville IL
Default

Originally Posted by wjsullivan
chris73cpe or Scott Marzahl what thickness sheet metal did you use?

Is this something that is easy enough to weld that I could go over to the local harbor freight, pick up a welder an do myself? I see a thread in the General section asking about welders but I don't know much about them.
That's exactly what I did, picked up this harbor freight welder although I think I paid $300 for it 2 years ago. You'll probably want to buy some better wire, a decent mask, and some other stuff along with the welder, and I also ended up running 220v service to my garage for it. You can do it with flux core wire, but its so much nicer with the gas bottle. I used 1/8" plate for mine too.
Reply

Get notified of new replies

To #4 Body Mount Question





All times are GMT -4. The time now is 02:49 AM.

story-0
5 Best & 5 Most Overrated Corvette Track Packages of All Time!

Slideshow: The 5 best and 5 most overrated Corvette track packages ever.

By Joe Kucinski | 2026-06-09 12:46:45


VIEW MORE
story-1
Every 2027 Corvette Engine Explained

Slideshow: Every 2027 Corvette engine explained

By Joe Kucinski | 2026-06-09 12:16:31


VIEW MORE
story-2
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette

Slideshow: A Jaguar designer's personal project imagines what a modern front-engined Corvette might look like if Chevrolet revisited the golden age of the Stingray.

By Verdad Gallardo | 2026-06-08 19:53:43


VIEW MORE
story-3
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-4
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-5
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-6
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-7
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-8
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-9
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