LT1-LT4 Modifications 1993-97 Gen II Small Block V8

A/C Firewall Stuff, removal

Thread Tools
 
Search this Thread
 
Old May 9, 2007 | 03:47 PM
  #1  
trouse40's Avatar
Thread Starter
TECH Regular
iTrader: (3)
 
Joined: Feb 2005
Posts: 473
Likes: 0
From: A-town, TX
Default A/C Firewall Stuff, removal

its a 94 lt1, any write ups? does it come out thru the engine bay or inside the car?
Reply
Old May 9, 2007 | 04:11 PM
  #2  
redneck01's Avatar
TECH Apprentice
iTrader: (3)
 
Joined: Jul 2006
Posts: 334
Likes: 0
From: baltimore, md
Default

comes out through inside, but i loosened a lotta stuf and did it with my motor out. check lt1tech.com also try a search if you havent already
Reply
Old May 9, 2007 | 04:49 PM
  #3  
Fire67's Avatar
TECH Fanatic
iTrader: (3)
 
Joined: Feb 2005
Posts: 1,118
Likes: 0
From: Naples, FL
Default

Supposed to come out through the inside... There's a writeup in here for 98+ cars, which is pretty much the same.

The BFH method works pretty well also...
Reply
Old May 9, 2007 | 04:49 PM
  #4  
OutlawZ's Avatar
9 Second Club
iTrader: (4)
 
Joined: Dec 2004
Posts: 2,607
Likes: 0
From: Cali
Default

you talking about the heater box????? if so have fun with it cuz it's a major PITA if you're not stripping everything out from behind the dash....

getting to the bolts is a pain but you gotta work on both sides of the firewall to get em...
Reply
Old May 9, 2007 | 04:52 PM
  #5  
the_merv's Avatar
11 Second Club
Veteran: Air Force
20 Year Member
Loved
Community Favorite
iTrader: (88)
 
Joined: Mar 2006
Posts: 21,019
Likes: 893
From: The Beach...
Default

I cut the front of it off and made a cover Panel, keeping the Heat.
I got rid if the little Vacumm Line goin in that is in the pic cause that whole thing stopped working. Heat works no problem.
This is what I got..

Last edited by the_merv; May 12, 2007 at 10:59 PM.
Reply
Old May 9, 2007 | 06:33 PM
  #6  
trouse40's Avatar
Thread Starter
TECH Regular
iTrader: (3)
 
Joined: Feb 2005
Posts: 473
Likes: 0
From: A-town, TX
Default

so i can do it like that and all the motors will still work fine? for heat and defrost?
Reply
Old May 9, 2007 | 07:11 PM
  #7  
the_merv's Avatar
11 Second Club
Veteran: Air Force
20 Year Member
Loved
Community Favorite
iTrader: (88)
 
Joined: Mar 2006
Posts: 21,019
Likes: 893
From: The Beach...
Default

Motors will work no problem, vents will work as long as you keep that little Black Vacumm Line. Mine all stopped workin, so I got rid of it.
Reply
Old May 9, 2007 | 08:28 PM
  #8  
trouse40's Avatar
Thread Starter
TECH Regular
iTrader: (3)
 
Joined: Feb 2005
Posts: 473
Likes: 0
From: A-town, TX
Default

so as lomg as i cut alone the firewall i wont cut anything i need?
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

6 Gifts Neither Your Dad Nor Grad Will Shove Into the 'Trinket Drawer'

 Brett Foote
story-1

Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

 Pouria Savadkouei
story-2

Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

 Verdad Gallardo
story-3

7 Most Reliable High-Performance Engines GM Has Ever Built

 Verdad Gallardo
story-4

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

 Verdad Gallardo
story-5

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-6

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

 Verdad Gallardo
story-7

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-8

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-9

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
Old May 9, 2007 | 08:36 PM
  #9  
the_merv's Avatar
11 Second Club
Veteran: Air Force
20 Year Member
Loved
Community Favorite
iTrader: (88)
 
Joined: Mar 2006
Posts: 21,019
Likes: 893
From: The Beach...
Default

Yup. You will have to cut a little out on the inside, where that metal piece is. If you leave it, you will block the air blowing from the Blower Motor. I am working on closing up all the gaps in there. Someone did it here also, they fiber glassed it all in.
Reply
Old May 12, 2007 | 09:15 PM
  #10  
NotACop97Z's Avatar
TECH Apprentice
iTrader: (7)
 
Joined: Dec 2005
Posts: 314
Likes: 1
From: Okinawa Japan
Default

Fiberglass is messy and fun
Reply
Old May 12, 2007 | 09:17 PM
  #11  
NotACop97Z's Avatar
TECH Apprentice
iTrader: (7)
 
Joined: Dec 2005
Posts: 314
Likes: 1
From: Okinawa Japan
Default



Reply
Old May 12, 2007 | 10:59 PM
  #12  
the_merv's Avatar
11 Second Club
Veteran: Air Force
20 Year Member
Loved
Community Favorite
iTrader: (88)
 
Joined: Mar 2006
Posts: 21,019
Likes: 893
From: The Beach...
Default

That's nice there..

Last edited by the_merv; May 13, 2007 at 02:20 AM.
Reply
Old May 12, 2007 | 11:05 PM
  #13  
Revelation Z28's Avatar
TECH Veteran
iTrader: (10)
 
Joined: Jul 2006
Posts: 4,770
Likes: 0
From: Rialto CA
Default

you have to take the dash apart to take the ac **** out???

to save myself time ill BFH the box
Reply
Old May 13, 2007 | 12:30 AM
  #14  
lethal93ta's Avatar
TECH Enthusiast
 
Joined: Sep 2003
Posts: 501
Likes: 0
From: bethel PA
Default

yes to do it the right way the dash has to come out, its a days worth of work to do it.




Reply
Old May 13, 2007 | 12:36 AM
  #15  
Revelation Z28's Avatar
TECH Veteran
iTrader: (10)
 
Joined: Jul 2006
Posts: 4,770
Likes: 0
From: Rialto CA
Default

how do you unscrew the box assembly where the PCM is? or at all. on the firewall.
Reply
Old May 13, 2007 | 12:38 AM
  #16  
lethal93ta's Avatar
TECH Enthusiast
 
Joined: Sep 2003
Posts: 501
Likes: 0
From: bethel PA
Default

theres 10MM bolts that hold it fast to the firewall the bad part is some are on the inside and some are on the outside. if the engine is still in the car there hard to get to.
Reply
Old May 13, 2007 | 12:46 AM
  #17  
Revelation Z28's Avatar
TECH Veteran
iTrader: (10)
 
Joined: Jul 2006
Posts: 4,770
Likes: 0
From: Rialto CA
Default

the ones on the side where the engine is i can get to, ive already tried.

the ones towards the PCM are on the inside?
Reply
Old May 13, 2007 | 01:47 AM
  #18  
Speed Density's Avatar
hashtagBMW
iTrader: (38)
 
Joined: Jul 2005
Posts: 6,572
Likes: 2
From: Boise, Idaho
Default

IMO you might as well delete all the HVAC if your going to remove the box in the engine bay. To much damn work with the engine in the car to do it nice and clean.

I just got done fiberglassing my heater box yesterday, got some bondo on it right now drying, will post pics soon.

Tony.
Reply
Old May 13, 2007 | 01:54 AM
  #19  
Revelation Z28's Avatar
TECH Veteran
iTrader: (10)
 
Joined: Jul 2006
Posts: 4,770
Likes: 0
From: Rialto CA
Default

im just thinking of getting rid of the condensor, and the lines running to the firewall for the AC. make a little more room and let my lid breathe more.
Reply
Old May 13, 2007 | 01:56 AM
  #20  
Speed Density's Avatar
hashtagBMW
iTrader: (38)
 
Joined: Jul 2005
Posts: 6,572
Likes: 2
From: Boise, Idaho
Default

Originally Posted by Revelation Z28
im just thinking of getting rid of the condensor, and the lines running to the firewall for the AC. make a little more room and let my lid breathe more.
That would be the only logical thing to do, remove the AC stuff itself but leave all of the box intact unless your doing the whole shabang of HVAC removal.

Tony.
Reply



All times are GMT -5. The time now is 01:15 PM.

story-0
6 Gifts Neither Your Dad Nor Grad Will Shove Into the 'Trinket Drawer'

Don't get dad new socks or a grill brush this year.

By Brett Foote | 2026-06-09 14:55:56


VIEW MORE
story-1
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

Slideshow: We take a close look at the ONE and Artidiag 800BT2 diagnostic tools from Topdon and the reasons to buy one over the other.

By Pouria Savadkouei | 2026-05-28 11:05:11


VIEW MORE
story-2
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

Slideshow: The controversial Ferrari F6 swaps its original flat-12 for a Corvette Z06-derived LT4 V8 and sends power to four rear wheels through a custom-built drivetrain.

By Verdad Gallardo | 2026-05-26 18:23:54


VIEW MORE
story-3
7 Most Reliable High-Performance Engines GM Has Ever Built

Slideshow:These GM engines didn't just make huge power, they survived abuse, boost, track days, and six-digit mileage with a reputation for refusing to quit.

By Verdad Gallardo | 2026-05-21 16:45:27


VIEW MORE
story-4
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-5
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-6
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-7
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-8
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-9
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE