C3 General General C3 Corvette Discussion not covered in Tech
Sponsored by:
Sponsored by:

C3 hardtop removal

Thread Tools
 
Search this Thread
 
Old Sep 14, 2020 | 02:31 PM
  #1  
strad's Avatar
strad
Thread Starter
1st Gear
 
Joined: Sep 2020
Posts: 1
Likes: 0
Default C3 hardtop removal

I have a 70 C3 removable hardtop/convertible and can't figure-out if there are some side mount bolts and some in the back of the trunk panel (four total) that hold it down and where they are or if the top just fits into the same rear pins as the convertible top and thats it?


Last edited by strad; Sep 14, 2020 at 02:55 PM.
Reply
Old Sep 14, 2020 | 02:35 PM
  #2  
LT2/3LT's Avatar
LT2/3LT
Pro
 
Joined: Apr 2020
Posts: 741
Likes: 717
From: Nashville, TN
2022 Corvette of the Year Finalist -- Unmodified
Unmodified C8 of the Year 2021 Winner
Default

Wrong forum. Seeking C3 forum I'm sure...as you have landed in the C8 forum. Mods will/may redirect.

Reply
Old Sep 14, 2020 | 03:51 PM
  #3  
Easy Mike's Avatar
Easy Mike
Team Owner
Supporting Lifetime
20 Year Member
 
Joined: Jun 2000
Posts: 38,923
Likes: 1,481
From: Southbound
Cruise-In II Veteran
Default

Originally Posted by strad
...if the top just fits into the same rear pins as the convertible top and thats it?...
Not quite. The hard top rear mounting studs pass through the folding top decklid latches. On some model years, there is a thumb screw in the center of the rear bow which uses a ferrule on the deck lid. There are two smaller mounts at the top of each lock post just behind the seats. The front bow of the hard top has three latches the same as the folding top.
Reply
Old Sep 14, 2020 | 03:58 PM
  #4  
avalonjohn's Avatar
avalonjohn
CF Community Team
15 Year Member
Veteran: Marine Corps
Liked
Top Answer: 1
 
Joined: Mar 2007
Posts: 9,325
Likes: 359
From: Delaware
St. Jude Donor '25
Default

Originally Posted by strad
I have a 70 C3 removable hardtop/convertible and can't figure-out if there are some side mount bolts and some in the back of the trunk panel (four total) that hold it down and where they are or if the top just fits into the same rear pins as the convertible top and thats it?
The hardtop has 2 side mounted bolts that attach to the inside of the rear deck. Those are REALLY important to use. In 1970, you should be using a threaded bolt in place of the convertible rear corner pins. They thread into the hardtop rear mounts (corners), then into the top receivers ( top of rear deck) and are secured underneath with a plate and nut. At some point ( not sure) there was a 3rd center mounted rear attachment point for the hardtop ( 5 rear points total). Pretty sure that was after 1969 sometime.
Front just uses short pins like the soft top.

Hope that helps.
Reply
Old Sep 14, 2020 | 04:06 PM
  #5  
ajchance's Avatar
ajchance
Instructor
10 Year Member
 
Joined: Nov 2012
Posts: 126
Likes: 50
From: Texas
Default

And to save you a yoga inspired cussfest while trying to install the nuts on the rear posts with the soft top in the way... lay the hard top into position and lift the rear deck lid to give you the clearance to tighten the nuts on the posts. You’ll need two able bodied participants. Then you can lower it back down to screw in the side bolts and front compression levers.
Reply
Old Sep 14, 2020 | 04:08 PM
  #6  
Eliredandblack's Avatar
Eliredandblack
Melting Slicks
Liked
Loved
Community Favorite
Top Answer: 1
 
Joined: Feb 2018
Posts: 2,325
Likes: 721
From: Marietta GA
Default

Depends on the car. First, there are two long threaded shafts that go through the chrome bezels (used by the soft top) located on the rear lid. Some folks (don’t ask me how) attach nuts and run them up the threaded studs, oh yes while the soft top is in there too. Second, some cars have a hole located around the middle of the rear lid. Third, on the inside of rear lid (next to the top of the pass/driver seat) there are hard top mounted brackets with rubber covers that have bolts going into special nuts. These bolts are removed with a standard Philips head screw driver. My 73 vinyl covered hardtop has the long threaded shafts, and brackets inside of rear lid. I don't see how it’s possible to get nuts on the threaded shafts. I purchased a kit with a electric ceiling mounted winch and pole/harness to remove my top. I think it took me less than two minutes to put a couple of scratches on the rear deck from the thread shafts. After scratching the rear lid, I came up with a solution to keep future scratches from occurring. If you are going to employ a winch system, let me know and I will post pictures of my scratch preventer.
Reply
Old Sep 14, 2020 | 05:19 PM
  #7  
62corvette's Avatar
62corvette
Le Mans Master
Supporting Lifetime
20 Year Member
Active Streak: 30 Days
Photogenic
Top Answer: 1
 
Joined: Nov 2004
Posts: 5,253
Likes: 768
From: Waterford WI
Default

Originally Posted by Eliredandblack
Depends on the car. First, there are two long threaded shafts that go through the chrome bezels (used by the soft top) located on the rear lid. Some folks (don’t ask me how) attach nuts and run them up the threaded studs, oh yes while the soft top is in there too. Second, some cars have a hole located around the middle of the rear lid. Third, on the inside of rear lid (next to the top of the pass/driver seat) there are hard top mounted brackets with rubber covers that have bolts going into special nuts. These bolts are removed with a standard Philips head screw driver. My 73 vinyl covered hardtop has the long threaded shafts, and brackets inside of rear lid. I don't see how it’s possible to get nuts on the threaded shafts. I purchased a kit with a electric ceiling mounted winch and pole/harness to remove my top. I think it took me less than two minutes to put a couple of scratches on the rear deck from the thread shafts. After scratching the rear lid, I came up with a solution to keep future scratches from occurring. If you are going to employ a winch system, let me know and I will post pictures of my scratch preventer.
Actually, the correct bolts that go through the brackets with the vinyl covers are hex head (1/2” wrench”) with a domed and flanged head. You can’t remove or tighten those correct ones with a phillips screwdriver. They are available from most vendors, and fit 1956-1975. GM never changed those.
Reply
Old Sep 14, 2020 | 05:36 PM
  #8  
Eliredandblack's Avatar
Eliredandblack
Melting Slicks
Liked
Loved
Community Favorite
Top Answer: 1
 
Joined: Feb 2018
Posts: 2,325
Likes: 721
From: Marietta GA
Default

Sorry, I haven’t put the top on in 7 or 8 months, you are correct, I have a nut driver that I bought to keep in the tube holder with the bolts., so I don’t loose them. Thanks
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

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

 Joe Kucinski
story-1

How Much Horsepower Every Corvette Engine "LOST" in 1972

 Joe Kucinski
story-2

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

 Michael S. Palmer
story-3

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

 Joe Kucinski
story-4

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

 Joe Kucinski
story-5

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

 Verdad Gallardo
story-6

Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

 Joe Kucinski
story-7

Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

 Verdad Gallardo
story-8

Top 10 Corvettes Coming to Mecum Indy 2026!

 Brett Foote
story-9

Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

 Michael S. Palmer
Old Oct 19, 2022 | 02:46 AM
  #9  
HYPR's Avatar
HYPR
Instructor
Liked
Loved
 
Joined: Jul 2022
Posts: 118
Likes: 88
From: Santa Clarita, CA
Default

I know this is an old thread but I found a partial quick install trick. I bought a set of Convertible top pins and replaced the long threaded studs with these, You will need to trim the threaded end back about .325" and then it is a trial and error fine tune adjustment so that the catch the convertible latch very tight. You want to have to push down on the roof to get them to latch but still loose enough that the latch will release when it is time to remove the top. The remaining problem is that center securing bolt which requires a nut which you can't get to with the convertible top in place. So to fill the approximate 1/32" gap from the weather striping (mine weather stripping is brand new) to the deck lid in the center I have purchased some weather striping that has a bubble to it. My plan is to add this just before the factory weather stripping to seal up the gap.
Reply

Get notified of new replies

To C3 hardtop removal





All times are GMT -4. The time now is 10:05 AM.

story-0
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-1
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-2
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-3
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-4
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-5
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
story-6
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

Slideshow: Ranking the top 10 Corvette engines by torque output.

By Joe Kucinski | 2026-05-05 11:58:09


VIEW MORE
story-7
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

Slideshow: A Corvette pace car nearly matching IndyCar speeds sounds exaggerated, until you look at the numbers.

By Verdad Gallardo | 2026-05-04 20:03:36


VIEW MORE
story-8
Top 10 Corvettes Coming to Mecum Indy 2026!

Among a rather large group of them.

By Brett Foote | 2026-05-04 13:56:44


VIEW MORE
story-9
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

Slideshow: the top 10 things Corvette owners want in the C9 Corvette

By Michael S. Palmer | 2026-04-30 12:41:15


VIEW MORE