Generation III External Engine LS1 | LS6 | Bolt-Ons | Intakes | Exhaust | Ignition | Accessories
Sponsored by:
Sponsored by:

MAP Sensor/Vacuum Fitting

Thread Tools
 
Search this Thread
 
Old Mar 16, 2011 | 09:29 AM
  #1  
OldCobraGuy's Avatar
Thread Starter
TECH Regular
iTrader: (2)
 
Joined: Jan 2011
Posts: 481
Likes: 3
Default MAP Sensor/Vacuum Fitting

I asked this in another thread, but thought it better to create my own instead of hijacking someone's thread.

The large plastic "fitting" that goes in the back of the intake...the one the MAP sensor sets in and the brake booster line and a/c lines attach to. This is a large round fitting that cannot be removed without damage by my understanding. However, mine spins around if you twist it. That cannot be a good seal. How normal is this and should I address it?

Thanks.
Reply
Old Mar 16, 2011 | 12:27 PM
  #2  
hiltsy855's Avatar
TECH Fanatic
15 Year Member
Liked
Loved
Community Favorite
iTrader: (35)
 
Joined: Jun 2007
Posts: 1,148
Likes: 28
From: Iowa
Default

I read somewhere on here that you have to get to that plug thru the throttle body hole. I think it can be removed with a special tool that reaches to the back of the intake. Maybe there are some tabs that hold it in? Anyway, mine spins too but there must be a seal on it because it doesn't leak.
Reply
Old Mar 16, 2011 | 01:02 PM
  #3  
Pocket's Avatar
TECH Addict
15 Year Member
iTrader: (22)
 
Joined: Apr 2009
Posts: 2,657
Likes: 149
From: NC
Default

Can you pull the fitting out? If not dont worry about it. Theres a large O-ring sealing the fitting and it wont unseal unless it's pulled free
Reply
Old Mar 16, 2011 | 07:59 PM
  #4  
S10xGN's Avatar
TECH Junkie
iTrader: (11)
 
Joined: Jul 2005
Posts: 3,782
Likes: 7
From: Port Neches, TX
Default

There are tabs on the inside, only accessible through the manifold. All you'd need is a long piece of thinwall tubing with the right ID to shove over and depress the tabs. If I had a manifold laying around...
Reply
Old Mar 16, 2011 | 08:03 PM
  #5  
southsidecox's Avatar
Staging Lane
iTrader: (11)
 
Joined: Nov 2008
Posts: 85
Likes: 1
Default

if it did start leaking i think i would try applying some clear silicone around joint before i risked breaking something trying to remove it
Reply
Old Mar 16, 2011 | 10:04 PM
  #6  
sjsingle1's Avatar
TECH Senior Member
15 Year Member
Photogenic
Photoriffic
Shutterbug
iTrader: (1)
 
Joined: Feb 2010
Posts: 6,759
Likes: 292
From: Fort Worth TX
Default

there is no straight shot with a piece of pipe to get to those tabs.....there are 3 support braces in the middle of the manifold that get in the way.....ask me how i know
Reply
Old Mar 16, 2011 | 10:07 PM
  #7  
sjsingle1's Avatar
TECH Senior Member
15 Year Member
Photogenic
Photoriffic
Shutterbug
iTrader: (1)
 
Joined: Feb 2010
Posts: 6,759
Likes: 292
From: Fort Worth TX
Default



that tab at the top fits into the mani and keeps it from spinning
Reply
Old Mar 16, 2011 | 10:08 PM
  #8  
sjsingle1's Avatar
TECH Senior Member
15 Year Member
Photogenic
Photoriffic
Shutterbug
iTrader: (1)
 
Joined: Feb 2010
Posts: 6,759
Likes: 292
From: Fort Worth TX
Default

Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

7 Most Reliable High-Performance Engines GM Has Ever Built

 Verdad Gallardo
story-1

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

 Verdad Gallardo
story-2

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

 Pouria Savadkouei
story-3

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

 Verdad Gallardo
story-4

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-5

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-6

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-7

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

 Verdad Gallardo
story-8

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

 Verdad Gallardo
story-9

10 Camaros You Should Never Buy

 
Old Mar 17, 2011 | 08:30 AM
  #9  
OldCobraGuy's Avatar
Thread Starter
TECH Regular
iTrader: (2)
 
Joined: Jan 2011
Posts: 481
Likes: 3
Default

Wow. So why does mine spin if it's supposed to be indexed like that? And I also read in a thread where someone else's spun. I did a lot of searching and couldn't come up with any answers to if this would leak. Now I see this and wonder why mine spins. That really has me concerned.

You are right sjsingle1, you can't access a straight shot through the throttle body opening. The floor braces are in the way. Those were put there to prevent objectionable noise believe it or not, and it's possible there are early manifolds without them. But not any LS6 manifolds.
Reply




All times are GMT -5. The time now is 05:33 AM.

story-0
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-1
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-2
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-3
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-4
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-5
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-6
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
story-7
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE
story-8
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-9
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE