C4 General Discussion General C4 Corvette Discussion not covered in Tech

Power Booster replacement

Thread Tools
 
Search this Thread
 
Old Mar 21, 2017 | 07:44 PM
  #1  
Need A Vette's Avatar
Need A Vette
Thread Starter
Instructor
 
Joined: Nov 2015
Posts: 231
Likes: 32
From: Cumming Georgia
Default Power Booster replacement

Alright guys, I need some help!

I've got the new booster, and yes, It came with the vacuum check valve installed...woooohooooo

I've pulled the drivers seat as I dont want to be upside down in the floorboard, as I'm 6'1", 230, retired military, and for the life of me cannot get the damned lower dash trim panel removed, the FSM kinda sucks!

So I'm on hold until I can get the damn trim panel out, any guidance here will be greatly appreciated

Thanks in Advance...

Damon
Reply
Old Mar 21, 2017 | 08:48 PM
  #2  
HAD2HAV2's Avatar
HAD2HAV2
Melting Slicks
25 Year Member
Liked
Loved
Community Favorite
 
Joined: Jan 2001
Posts: 2,996
Likes: 304
From: MOORESVILLE NC
Default

I see you have a 89 (I have a 88). There should be several Philips head screws under the steering wheel to the left and right. There is a nut,10 or13mm I think, way in the middle back near the fire wall. I also think you are going to have to unhook the diagnostic port and move it out of the way. Then you can drop the carpet panel to disconnect the foot well light.

Last edited by HAD2HAV2; Mar 21, 2017 at 08:49 PM.
Reply
Old Mar 21, 2017 | 10:44 PM
  #3  
jv9999's Avatar
jv9999
Melting Slicks
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Jan 2014
Posts: 2,185
Likes: 381
From: Lunenburg MA
Default

You think the panel is bad, wait until you see the inboard nut holding the booster in. :-)
Reply
Old Mar 21, 2017 | 11:32 PM
  #4  
teal9550's Avatar
teal9550
7th Gear
 
Joined: Feb 2017
Posts: 7
Likes: 0
Default

on my 84 i dropped the panel below the steering wheel, pushed the clip off the brake pedal used a couple of long 1/4 inch drive extensions and a 13mm socket and took the nuts off with an electric impact. i didn't remove the seat....did i mention I'm 6'5" and 275lbs
Reply
Old Mar 22, 2017 | 08:16 AM
  #5  
Need A Vette's Avatar
Need A Vette
Thread Starter
Instructor
 
Joined: Nov 2015
Posts: 231
Likes: 32
From: Cumming Georgia
Default The Journey continues...

I've got the extensions and the sockets...

My panel doesn't have any screws, and I have a suspicion that it's been removed before, as it's all bolts, I should have taken a picture! DOH!!

Anyway, the journey continues tonight after work, I know from here the bolts that live inside the holes of the panel are to be 10mm, the others deeper in the footwell are minute, tiny little things, I dont even have a socket small enough! as I would much rather replace them with either screws, or hex keyed screws...

Though I'm also having a case of 'while I'm at it' as the power seat transmission only works front to back, nothing else, I checked the switch when I had the console apart fixing the shifter (ZF, 6sp), but the other functions on the seat are inop. I'm considering changing that while I have the seat out...

Thanks for everything guys...

D.

Last edited by Need A Vette; Mar 22, 2017 at 08:19 AM.
Reply
Old Mar 23, 2017 | 02:51 AM
  #6  
Cliff Harris's Avatar
Cliff Harris
Race Director
15 Year Member
 
Joined: Apr 2002
Posts: 10,036
Likes: 346
From: Anaheim CA
Default

Originally Posted by Need A Vette
My panel doesn't have any screws, and I have a suspicion that it's been removed before, as it's all bolts, I should have taken a picture! DOH!!
Mine has 7mm hex head screws:



My recollection is that you can remove the panel without removing the ALDL connector.
Reply
Old Mar 23, 2017 | 08:53 AM
  #7  
Need A Vette's Avatar
Need A Vette
Thread Starter
Instructor
 
Joined: Nov 2015
Posts: 231
Likes: 32
From: Cumming Georgia
Default

Yeah I got it all done last night, well I got the panel removed! wooohooo

I then did my best impression of a contortionist and proceeded, down into the foot well, upside down, on my back and began the tedious process of seperating the actuator rod from the brake pedal. After about 20 minutes of struggling, with needle nosed pliers, screwdrivers, and an awl, I finally got the retaining clip out, and the actuator rod off of the pedal. Call it PROGRESS!

so, I have the panel off
Actuator Rod Disconnected
Master cylinder loose from power booster
Vacuum Line disconnected from Check Valve

All that remains are those 2 dastardly 10mm nuts on the inside of the firewall...That is my mission tonight, should I choose to accept it, and I'm fully aware that all members of this forum will disavow any knowledge of my actions...

Wish me luck!

D.
Reply
Old Mar 23, 2017 | 10:46 AM
  #8  
HAD2HAV2's Avatar
HAD2HAV2
Melting Slicks
25 Year Member
Liked
Loved
Community Favorite
 
Joined: Jan 2001
Posts: 2,996
Likes: 304
From: MOORESVILLE NC
Default

I've done this job once back in the late 90's on my 88 and I still remember that it was not a fun job but doable.
Sorry for the bad advice on the screws / 7mm screws as Cliff shows. The power of the iPhone is much greater than the power of memory.
Have a helper ready to hold the booster while you tighten the bolts. I didn't have a 1/4 inch battery powered ratchet when I did that job but if you do it would make the job so much easier than turning a ratchet.
I have one now and love it as you can also attach a 1/2 inch adapter to it.
Reply
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
Old Mar 23, 2017 | 12:01 PM
  #9  
1bdvet's Avatar
1bdvet
Team Owner
Veteran: Air Force
St. Jude 20 Year Donor
25 Year Member
Liked
 
Joined: May 2000
Posts: 53,723
Likes: 5,609
From: Plantation Florida USAF(Retired) 1966-1990
U.S. Air Force
St. Jude Donor '05 thru '26
NCM Sinkhole Donor
Default

I feel for you, remember doing it on my 89, and like you pulled the seat to get some work room, and lot 4 letter words, but it's better then paying a tech to do the job.


Thank you for your Service.

Last edited by 1bdvet; Mar 23, 2017 at 12:03 PM.
Reply
Old Mar 23, 2017 | 03:51 PM
  #10  
dm575's Avatar
dm575
Instructor
10 Year Member
 
Joined: May 2012
Posts: 106
Likes: 4
From: Midlands UK
Default

When I did mine I ended up using a trolley jack in the footwell to hold the pedal assy in place so that I could get the bolts through the bulkhead. What fun !!!
Reply

Get notified of new replies

To Power Booster replacement





All times are GMT -4. The time now is 05:08 AM.

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