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

Exhaust installation question

Thread Tools
 
Search this Thread
 
Old Jan 14, 2012 | 07:38 AM
  #1  
Johan74's Avatar
Johan74
Thread Starter
Racer
15 Year Member
 
Joined: Jan 2007
Posts: 308
Likes: 18
From: Sweden
Default Exhaust installation question

From top to bottom:

-Exhaust manifold
-Gasket
-Heat riser (or in my case just the spacers) with flat surface up
-Donut
-Sleeve
-Exhaust (side) with flange

Seems like this do not fit together...

Is it EITHER Heat riser spacer OR donut+sleeve?

If so, how does the heat riser seal against the exhaust?

/Johan
Reply
Old Jan 14, 2012 | 08:43 AM
  #2  
Johan74's Avatar
Johan74
Thread Starter
Racer
15 Year Member
 
Joined: Jan 2007
Posts: 308
Likes: 18
From: Sweden
Default

I should add that I have two heat riser spacers that were on both sides when taking old system off, but I do not recall removing any donuts or sleeves...
Reply
Old Jan 14, 2012 | 08:44 AM
  #3  
Alan 71's Avatar
Alan 71
Team Owner
15 Year Member
Active Streak: 120 Days
Community Influencer
Top Answer: 5
 
Joined: Sep 2006
Posts: 31,335
Likes: 4,449
From: Westminster Maryland
Default

Hi J,
The heat riser was on the right side originally. No riser or spacer on the left side. Just the donut and sleeve.
Originally the heat riser butted against the manifold with no gasket, then the sleeve slipped into the heat riser, then the donut slid on the sleeve, and then the flange on the pipe started on the studs. The large diameter end of the sleeve goes into the heat riser (right side) and manifold (left side).
Hope this helps!
Regards,
Alan

Last edited by Alan 71; Jan 14, 2012 at 08:48 AM.
Reply
Old Jan 14, 2012 | 11:10 AM
  #4  
Johan74's Avatar
Johan74
Thread Starter
Racer
15 Year Member
 
Joined: Jan 2007
Posts: 308
Likes: 18
From: Sweden
Default

Thanks but it still doesn'tmake sence with the spacer...
On the driver side the manifold is slightly tapered in the bottom so the sleeve will go in there.
But the spacer is the same diameter in the bottom as the big end of the sleeve. Cant see how they can sit against each other?
In the picture to the left they are like that, but I cant see how they will stay centered if the whole thing is tightened?


Reply
Old Jan 14, 2012 | 11:49 AM
  #5  
Steve2147's Avatar
Steve2147
Pro
 
Joined: May 2011
Posts: 581
Likes: 5
From: BC
Default

Turn the sleeve around. It goes into the pipe just to centre the donut. Rt side only.

Steve g
Reply
Old Jan 14, 2012 | 12:06 PM
  #6  
Johan74's Avatar
Johan74
Thread Starter
Racer
15 Year Member
 
Joined: Jan 2007
Posts: 308
Likes: 18
From: Sweden
Default

Are you saying that I should have the small end up into the spacer??

The picture is not very good, but the spacer is standing on the big end of the sleeve.
Reply
Old Jan 14, 2012 | 12:21 PM
  #7  
Steve2147's Avatar
Steve2147
Pro
 
Joined: May 2011
Posts: 581
Likes: 5
From: BC
Default

Originally Posted by Johan74
Are you saying that I should have the small end up into the spacer??

The picture is not very good, but the spacer is standing on the big end of the sleeve.
No, the small diameter end goes in the pipe. The large diameter should protrude out of the pipe less than the thickness of the donut so that it does not interfere with tightening the donut against the spacer. It is just there to hold the donut to the pipe in the centred position for assembly.

It looked in the pic like you were trying to instal the sleeve into the spacer.
Steve g
Reply
Old Jan 14, 2012 | 02:25 PM
  #8  
Johan74's Avatar
Johan74
Thread Starter
Racer
15 Year Member
 
Joined: Jan 2007
Posts: 308
Likes: 18
From: Sweden
Default

Ok.

Problem is that the donut does not sit well against the spacer. See pic. Is this normal?
My understanding is that the original heat riser is tapered in the bottom?



Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

2027 Chevrolet Silverado 1500 First Look: Everything You NEED to Know!

 Michael S. Palmer
story-1

5 Best & 5 Worst Corvette Daily Drivers

 Joe Kucinski
story-2

The Headlights of Every Corvette Generation Explained

 Joe Kucinski
story-3

5 Best & 5 Most Overrated Corvette Track Packages of All Time!

 Joe Kucinski
story-4

Every 2027 Corvette Engine Explained

 Joe Kucinski
story-5

Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette

 Verdad Gallardo
story-6

10 Ugly Corvettes That We Still Kinda Love

 Joe Kucinski
story-7

Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

 Brett Foote
story-8

10 Things Every Corvette Owner Needs (2026 Edition)

 Michael S. Palmer
story-9

8 Most "Only Corvette Owners Understand" Quirks and Problems

 Pouria Savadkouei
Old Jan 14, 2012 | 03:22 PM
  #9  
Steve2147's Avatar
Steve2147
Pro
 
Joined: May 2011
Posts: 581
Likes: 5
From: BC
Default

Don't know why I didn't notice it before, but you have two different system types. That spacer/heat riser eliminator is intended to be used without a donut or gasket of any type. The pipe sits right up against the bevel on the spacer. The donut and sleeve is for use with heatrisers that have a bevel cut into them.

Steve g
Reply
Old Jan 14, 2012 | 06:35 PM
  #10  
Johan74's Avatar
Johan74
Thread Starter
Racer
15 Year Member
 
Joined: Jan 2007
Posts: 308
Likes: 18
From: Sweden
Default

Thanks!

/Johan
Reply

Get notified of new replies

To Exhaust installation question





All times are GMT -4. The time now is 10:56 PM.

story-0
2027 Chevrolet Silverado 1500 First Look: Everything You NEED to Know!

Slideshow: Is the 2027 Chevrolet Silverado 1500 the best Silverado yet?

By Michael S. Palmer | 2026-06-16 08:01:12


VIEW MORE
story-1
5 Best & 5 Worst Corvette Daily Drivers

Slideshow: 5 best and 5 worst Corvette daily drivers

By Joe Kucinski | 2026-06-15 10:32:13


VIEW MORE
story-2
The Headlights of Every Corvette Generation Explained

Slideshow: The headlights of every Corvette generation explained

By Joe Kucinski | 2026-06-15 10:17:14


VIEW MORE
story-3
5 Best & 5 Most Overrated Corvette Track Packages of All Time!

Slideshow: The 5 best and 5 most overrated Corvette track packages ever.

By Joe Kucinski | 2026-06-09 12:46:45


VIEW MORE
story-4
Every 2027 Corvette Engine Explained

Slideshow: Every 2027 Corvette engine explained

By Joe Kucinski | 2026-06-09 12:16:31


VIEW MORE
story-5
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette

Slideshow: A Jaguar designer's personal project imagines what a modern front-engined Corvette might look like if Chevrolet revisited the golden age of the Stingray.

By Verdad Gallardo | 2026-06-08 19:53:43


VIEW MORE
story-6
10 Ugly Corvettes That We Still Kinda Love

Slideshow: 10 ugly Corvettes that we still kinda love.

By Joe Kucinski | 2026-06-03 10:34:17


VIEW MORE
story-7
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

A lot of money has changed hands at the online auction house over the years.

By Brett Foote | 2026-06-03 10:21:50


VIEW MORE
story-8
10 Things Every Corvette Owner Needs (2026 Edition)

Slideshow: 10 great gifts Corvette enthusiasts actually want for Father's Day!

By Michael S. Palmer | 2026-06-03 15:43:40


VIEW MORE
story-9
8 Most "Only Corvette Owners Understand" Quirks and Problems

Slideshow: These are the quirks, annoyances, and oddly lovable problems that every Corvette owner eventually learns to live with.

By Pouria Savadkouei | 2026-05-28 09:31:39


VIEW MORE