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

Mystery box

Thread Tools
 
Search this Thread
 
Old Jan 22, 2024 | 05:39 PM
  #1  
Dogmark's Avatar
Dogmark
Thread Starter
Instructor
Conversation Starter
All Eyes On Me
Liked
 
Joined: Nov 2023
Posts: 166
Likes: 28
From: Western new York
Default Mystery box

What is the black box under the driver side fender next to the master cylinder can’t see any lines or wires going to it on my 69
Reply
Old Jan 22, 2024 | 05:49 PM
  #2  
ChiefBoats's Avatar
ChiefBoats
T2T SUPPORTER
Supporting Member
Veteran: Air Force
Veteran: Coast Guard
Active Streak: 120 Days
Top Answer: 5
 
Joined: Jul 2013
Posts: 9,108
Likes: 5,022
From: NNCC No Name Car Crew; Owned 1 C2, 2 C3's, 1 C4, 3 C5's, 1 C6, 2 C7's; Now '86, '03; S. DE
2024 C5 of the Year Finalist - Modified
2024 C4 of the Year Finalist - Modified
2024 Corvette of the Year Finalist - Unmodified
2023 C3 of the Year Wnner - Unmodified
2023 C5 of the Year Finalist - Unmodified
St. Jude Donor '21-'22-'23-'24-'25-'26
Default

Originally Posted by Dogmark
What is the black box under the driver side fender next to the master cylinder can’t see any lines or wires going to it on my 69
A picture would help.
Reply
Old Jan 22, 2024 | 06:01 PM
  #3  
ctmccloskey's Avatar
ctmccloskey
Safety Car
Supporting Lifetime
25 Year Member
Active Streak: 30 Days
Active Streak: 60 Days
Liked
 
Joined: May 2001
Posts: 4,749
Likes: 1,642
From: Fairfax Virginia
Default

If it is well tucked into the bottom of the fender and is maybe holds a gallon of air or so. I believe whet you are looking at is the Vacuum reservoir and there are lines going to it connecting it to your cars vacuum system.



Reply
Old Jan 22, 2024 | 06:08 PM
  #4  
ctmccloskey's Avatar
ctmccloskey
Safety Car
Supporting Lifetime
25 Year Member
Active Streak: 30 Days
Active Streak: 60 Days
Liked
 
Joined: May 2001
Posts: 4,749
Likes: 1,642
From: Fairfax Virginia
Default

Hello again Chief!

I saw your request for a picture which would be a great help of course but a lot of us (me, included) are not familiar with putting pictures up.

On my 1968 the only thing that looks kind of boxy and is below the fender but near the Master Cylinder. The only thing there on my 1968 is a vacuum reservoir. I would have been curious if he was describing the Horn Relay, that has wires that are important in my 1968.
Reply
Old Jan 22, 2024 | 06:32 PM
  #5  
Rescue Rogers's Avatar
Rescue Rogers
Is my vette stock?? HAHA
Supporting Lifetime Gold
Veteran: Navy
10 Year Member
Community Builder
Loved
 
Joined: Oct 2015
Posts: 20,169
Likes: 9,297
From: Im not allowed to tell you
2020 C3 of the Year Finalist - Modified
2020 Corvette of the Year Finalist (performance mods)
2019 C3 of Year Winner (performance mods)
2016 C3 of Year Finalist
Default

Tap onnit and see if its metal and hollow
Reply
Old Jan 22, 2024 | 06:38 PM
  #6  
kanvasman's Avatar
kanvasman
Safety Car
10 Year Member
Liked
Community Favorite
Top Answer: 5
 
Joined: Dec 2012
Posts: 3,800
Likes: 1,712
From: Summerville SC
Default

Regarding putting up pictures, when you are going to reply to a thread, click the box that says GO ADVANCED. That will bring up a new reply window. GO to the top heading and click on the paper clip icon. Then just drag whatever picture you want into that new window, click on the UPLOAD and it will show up in your reply where you left the cursor ( the blinking little line) . Old guys need to stick together and If I can do it anyone can.
Reply
Old Jan 22, 2024 | 06:39 PM
  #7  
ChiefBoats's Avatar
ChiefBoats
T2T SUPPORTER
Supporting Member
Veteran: Air Force
Veteran: Coast Guard
Active Streak: 120 Days
Top Answer: 5
 
Joined: Jul 2013
Posts: 9,108
Likes: 5,022
From: NNCC No Name Car Crew; Owned 1 C2, 2 C3's, 1 C4, 3 C5's, 1 C6, 2 C7's; Now '86, '03; S. DE
2024 C5 of the Year Finalist - Modified
2024 C4 of the Year Finalist - Modified
2024 Corvette of the Year Finalist - Unmodified
2023 C3 of the Year Wnner - Unmodified
2023 C5 of the Year Finalist - Unmodified
St. Jude Donor '21-'22-'23-'24-'25-'26
Default

Originally Posted by ctmccloskey
Hello again Chief!

I saw your request for a picture which would be a great help of course but a lot of us (me, included) are not familiar with putting pictures up.

On my 1968 the only thing that looks kind of boxy and is below the fender but near the Master Cylinder. The only thing there on my 1968 is a vacuum reservoir. I would have been curious if he was describing the Horn Relay, that has wires that are important in my 1968.
I'm thinking the reservior too, only thing I can think of.
Actuall posting photos is quite easy if you have a picture file on your computer, not a phone. I do take pics with the phone, then download to my computer (laptop) picture file, edit for size, then post using the forum's picture posting site.
Reply
Old Jan 22, 2024 | 11:17 PM
  #8  
MelWff's Avatar
MelWff
Race Director
20 Year Member
Liked
Loved
Community Favorite
 
Joined: May 2006
Posts: 18,695
Likes: 2,572
Default

Here is a picture of a vacuum reservoir
Vacuum Reservoir
Reply

Get notified of new replies

To Mystery box

Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

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

 Michael S. Palmer
story-1

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

 Joe Kucinski
story-2

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

 Joe Kucinski
story-3

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

 Verdad Gallardo
story-4

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

 Joe Kucinski
story-5

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

 Verdad Gallardo
story-6

Top 10 Corvettes Coming to Mecum Indy 2026!

 Brett Foote
story-7

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

 Michael S. Palmer
story-8

10 Revolutionary 'Corvette Firsts' Most People Don't Know

 Joe Kucinski
story-9

5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

 Michael S. Palmer




All times are GMT -4. The time now is 10:42 PM.

story-0
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-1
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-2
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-3
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-4
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-5
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-6
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-7
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
story-8
10 Revolutionary 'Corvette Firsts' Most People Don't Know

Slideshow: 10 Important Corvette 'firsts' that every fan should know.

By Joe Kucinski | 2026-04-29 17:02:16


VIEW MORE
story-9
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

Slideshow: Should you buy a 2020-2026 Corvette or wait for 2027?

By Michael S. Palmer | 2026-04-22 10:08:58


VIEW MORE