C5 Tech Corvette Tech/Performance: LS1 Corvette Technical Info, Internal Engine, External Engine, Tech Topics, Basic Tech, Maintenance, How to Remove & Replace
Sponsored by:
Sponsored by:

OBX headers are on...strange chirps!!

Thread Tools
 
Search this Thread
 
Old Jul 24, 2010 | 03:49 PM
  #1  
87gtNOS's Avatar
87gtNOS
Thread Starter
Racer
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Jun 2010
Posts: 415
Likes: 16
From: Toronto
Default OBX headers are on...strange chirps!!

Well, with a hoist and air tools....I had this done by myself (with help holding the headers up from underneath as I started the bolts) in less than 6 hours. Removed alternator, and both coil packs and spark plugs.
Stock headers came out the top very easily.

OBX passenger side in from the top...took some wrestling.
Driver side from the bottom very easily.

Very close in a couple spots to touching bell housing.

I rewired the connectors onto my rear O2's.

I now have P0140 and 160 codes...no rear O2's....even with the COT on the DIABLO turned to MAX.


HERE's the kicker....what the hell is this chirp?? At 1600rpm at idle and sometimes at other rpms.
Is it the AIR PUMP? Is there a fuse I can pull out or unplug the air pump for the time being??

Thanks
Reply
Old Jul 24, 2010 | 06:01 PM
  #2  
Got uid0's Avatar
Got uid0
Le Mans Master
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Mar 2002
Posts: 8,466
Likes: 51
St. Jude Donor '17
Default

probably an exhaust leak
Reply
Old Jul 24, 2010 | 07:21 PM
  #3  
chevylad's Avatar
chevylad
Pro
10 Year Member
 
Joined: Dec 2003
Posts: 654
Likes: 1
From: chandler az
Default

I'm trying to build an audio sound in my head of what you are calling a chirp and all I get are either little birds or tire screech. Can you elaborate a little more?
Reply
Old Jul 24, 2010 | 07:27 PM
  #4  
japc5's Avatar
japc5
Burning Brakes
15 Year Member
 
Joined: Apr 2008
Posts: 855
Likes: 40
From: Liverpool NY
Default

Check your belt make sure it is sitting on all the pully's.
Reply
Old Jul 25, 2010 | 07:54 AM
  #5  
87gtNOS's Avatar
87gtNOS
Thread Starter
Racer
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Jun 2010
Posts: 415
Likes: 16
From: Toronto
Default

Originally Posted by Got uid0
probably an exhaust leak
Thank guys!! The chirp noise was created by blowby on the drivers side steel manifold gasket!
I unbolted the header and sealed it up with Ultra Copper silicone and let it dry overnight!
Now it only makes awesome vroom noises!!
Reply
Old Jul 25, 2010 | 10:25 AM
  #6  
printmanjackson's Avatar
printmanjackson
Safety Car
20 Year Member
Conversation Starter
 
Joined: Jul 2005
Posts: 3,572
Likes: 9
From: Jackson Tn
St. Jude Donor '06-'07-'08-'09
Default

Originally Posted by 87gtNOS
Thank guys!! The chirp noise was created by blowby on the drivers side steel manifold gasket!
I unbolted the header and sealed it up with Ultra Copper silicone and let it dry overnight!
Now it only makes awesome vroom noises!!
sounds like the header flange is not flat against the head. Are you sure the headers are not touching the bellhousing somewhere?
Reply

Get notified of new replies

To OBX headers are on...strange chirps!!





All times are GMT -4. The time now is 01:46 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