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

Whistle Noise

Thread Tools
 
Search this Thread
 
Old Oct 3, 2014 | 06:12 PM
  #1  
MrC603's Avatar
Thread Starter
Teching In
 
Joined: Sep 2006
Posts: 4
Likes: 0
Default Whistle Noise

Hey guys,

I have a 97 ss and Ive had this noise that usually occurs on cold start but it started happening all the time now and it has grown louder. I thought it might be either alternator, power steering pump etc so i took off the belt and the noise still happens. It sounds like its coming from the driver side by the intake, does anyone have any experience with something like this? or any ideas wat i could try next? I posted a link to the video check it out and thanks for your help.

Eric

Reply
Old Oct 4, 2014 | 04:57 AM
  #2  
SS RRR's Avatar
Village Troll
20 Year Member
Liked
Loved
Community Favorite
iTrader: (2)
 
Joined: Oct 2002
Posts: 11,111
Likes: 598
From: Jackstandican
Default

I'd say your tea is ready. Seems when you dropped the fuel lines at the end of the video the high pitch went away for a fraction of a second. There are vacuum lines on that side of the intake. Start digging around there to see if you can find any lines that are cracked or broken.
Reply
Old Oct 4, 2014 | 06:30 AM
  #3  
cardo0's Avatar
Banned
 
Joined: Jan 2013
Posts: 588
Likes: 0
From: Las Vegas
Default

Sounds more metallic like a dry brg (squeal) on one of the accessories. Get the stethoscope out and see if its transmitted through the engine metal & brackets or body metal.
Reply
Old Oct 4, 2014 | 08:50 AM
  #4  
96capricemgr's Avatar
11 Second Club
iTrader: (1)
 
Joined: Sep 2004
Posts: 11,975
Likes: 15
Default

If an accessory is suspect pull the belt before startup, if that makes the noise stop then stethoscope.
Reply
Old Oct 4, 2014 | 11:01 AM
  #5  
BALLSS's Avatar
TECH Veteran
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Apr 2008
Posts: 4,985
Likes: 112
Default

is that an aftermarket TB?

does noise go away when you give it throttle?
Reply
Old Oct 4, 2014 | 01:54 PM
  #6  
jaycenk's Avatar
TECH Addict
iTrader: (1)
 
Joined: Jun 2009
Posts: 2,210
Likes: 1
From: Holiday, FL
Default

Sounds like vac leak
There are two small vacuum ports on that side of the engine and brake booster line. One goes to Opti, One goes to EGR. check those. also check the intake line for the opti that connects at the elbow on the intake pipes before the TB.
In with the fuel lines is a vapor line that get connected to a hard plastic pipe that runs under the TB over to the solenoids mounted on the passenger side of the intake and then runs to the TB on the passenger side. There are a lot of connections there that can leak
Reply
Old Oct 5, 2014 | 01:32 AM
  #7  
NewOrleansLT1's Avatar
11 Second Club
15 Year Member
 
Joined: Jan 2010
Posts: 1,707
Likes: 13
From: New Orleans, LA
Default

Sounds like the air pump to me lol
Reply
Old Oct 5, 2014 | 01:36 AM
  #8  
SS RRR's Avatar
Village Troll
20 Year Member
Liked
Loved
Community Favorite
iTrader: (2)
 
Joined: Oct 2002
Posts: 11,111
Likes: 598
From: Jackstandican
Default

Originally Posted by NewOrleansLT1
Sounds like the air pump to me lol
I thought that too, but the OP states the noise is constant so...
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

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

 Verdad Gallardo
story-1

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

 Pouria Savadkouei
story-2

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

 Verdad Gallardo
story-3

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-4

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-5

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-6

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

 Verdad Gallardo
story-7

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

 Verdad Gallardo
story-8

10 Camaros You Should Never Buy

 
story-9

10 LS Engine Myths That Refuse to Die

 Verdad Gallardo
Old Oct 5, 2014 | 11:56 PM
  #9  
MrC603's Avatar
Thread Starter
Teching In
 
Joined: Sep 2006
Posts: 4
Likes: 0
Default

it was the pcv valve thanks for the help guys!
Reply




All times are GMT -5. The time now is 07:41 PM.

story-0
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-1
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-2
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-3
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-4
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-5
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-6
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-7
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-8
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
story-9
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE