C3 General General C3 Corvette Discussion not covered in Tech
Sponsored by:
Sponsored by:

Exhaust Leak.

Thread Tools
 
Search this Thread
 
Old Jul 22, 2010 | 11:21 PM
  #1  
sil68's Avatar
sil68
Thread Starter
Heel & Toe
 
Joined: May 2010
Posts: 15
Likes: 0
Default Exhaust Leak.

Hey guys,
This might sound strange, but I cannot find my exhaust leak, It's been eluding me. I know it's there and I only really hear it when I pass by another car, or a high curb. I've hd the car jacked up and looked for rott or ay hole in exhaust, and I've checked the engine compartment... with the use of a (Marksman Ultrasonic Diagnostic Tool.) Hmmmm... Help?
Reply
Old Jul 23, 2010 | 05:36 AM
  #2  
corvetteload's Avatar
corvetteload
Melting Slicks
 
Joined: Aug 2005
Posts: 2,359
Likes: 15
From: Confusion
Default

BB or SB?!?!?!?! BB exhaust manifolds are known to crack. One way is to get car up in the air and have someone cover each tailpipe outlet with a handful of rags as you listen for the backpressure leak. Have you checked the tightness of the exhaust manifold bolts? Is it really the exhaust and not a U-joint possibly or rotor scraping. Exhaust should be like a ticking noise. Good luck
Reply
Old Jul 23, 2010 | 10:35 AM
  #3  
sil68's Avatar
sil68
Thread Starter
Heel & Toe
 
Joined: May 2010
Posts: 15
Likes: 0
Default

Thank you sir... I will look into this in a couple of days, I will let you know what I find.
Reply
Old Jul 23, 2010 | 10:46 AM
  #4  
Easy Mike's Avatar
Easy Mike
Team Owner
Supporting Lifetime
20 Year Member
 
Joined: Jun 2000
Posts: 38,923
Likes: 1,482
From: Southbound
Cruise-In II Veteran
Default

Donuts. Loose manifold bolt. Loose flange nut.

Reply
Old Jul 23, 2010 | 10:55 AM
  #5  
Lon Wayne's Avatar
Lon Wayne
Drifting
 
Joined: May 2006
Posts: 1,480
Likes: 2
From: Circleville Ohio
Default Vader Vette

Originally Posted by sil68
Hey guys,
This might sound strange, but I cannot find my exhaust leak, It's been eluding me. I know it's there and I only really hear it when I pass by another car, or a high curb. I've hd the car jacked up and looked for rott or ay hole in exhaust, and I've checked the engine compartment... with the use of a (Marksman Ultrasonic Diagnostic Tool.) Hmmmm... Help?
I had A Cracked Donut Gasket and it wolud tend to stop after heating up, really cheap fix the hardest thing will be the three bolts holding the pipe to the Exh Manifold pipe.
Reply
Old Jul 23, 2010 | 12:44 PM
  #6  
BBCorv70's Avatar
BBCorv70
Melting Slicks
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Apr 2007
Posts: 3,189
Likes: 111
From: Tolland CT
Default

Originally Posted by Lon Wayne
I had A Cracked Donut Gasket and it wolud tend to stop after heating up, really cheap fix the hardest thing will be the three bolts holding the pipe to the Exh Manifold pipe.
I've used a piece of garden hose like a stethoscope to zero in on the source of noise. Held one end to my ear while passing the other over the area in question. I found a crack in the heat riser, between the exhaust manifold and pipe on the right side using this technique. When I got close the popping of the exhaust leak it became clear. Found a hairline crack in the casting, difficult to see when it was cold. Must have opened up when it heated up.

I've used this technique for locating noisy tappets as well. May sound strange but it has worked for me many times.
Reply

Get notified of new replies

To Exhaust Leak.





All times are GMT -4. The time now is 02:25 PM.

story-0
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-1
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-2
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-3
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
story-4
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

Slideshow: 10 reasons why the C6 Z06 is still a performance benchmark after 20 years.

By Joe Kucinski | 2026-05-27 17:20:09


VIEW MORE
story-5
How Much Horsepower Every Corvette Engine "LOST" in 1972

Slideshow: How much horsepower every Corvette engine lost in 1972.

By Joe Kucinski | 2026-05-27 16:54:53


VIEW MORE
story-6
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-7
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-8
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-9
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