Generation III Internal Engine 1997-2006 LS1 | LS6
Sponsored by:
Sponsored by:

Bird's nest when I downshift?

Thread Tools
 
Search this Thread
 
Old Jun 26, 2006 | 02:28 PM
  #1  
N4cer's Avatar
Thread Starter
10 Second Club
iTrader: (11)
 
Joined: Apr 2006
Posts: 2,526
Likes: 1
From: Ashland, KY
Default Bird's nest when I downshift?

When I downshift, I get a chirping noise from the engine. Not the tires like a hard downshift. Just if I drop a gear while slowing for a red light or just let off when above about 1800RPM, I hear what sounds like birds chirping rhythmicly in my engine bay. And it's more distinct when the cutout is uncapped, so I'm pretty sure it's an internal problem. Ideas anyone?
Reply
Old Jun 26, 2006 | 02:37 PM
  #2  
Justin00SS's Avatar
TECH Fanatic
iTrader: (5)
 
Joined: Feb 2006
Posts: 1,673
Likes: 2
From: Mobile, AL
Default

check the oil. Check the vacuum lines.
Reply
Old Jun 26, 2006 | 02:43 PM
  #3  
TchargedLS1TA's Avatar
TECH Fanatic
iTrader: (9)
 
Joined: Jan 2003
Posts: 1,648
Likes: 1
From: Temple, TX
Default

Valve seat coming lose?
Reply
Old Jun 26, 2006 | 02:53 PM
  #4  
Justin00SS's Avatar
TECH Fanatic
iTrader: (5)
 
Joined: Feb 2006
Posts: 1,673
Likes: 2
From: Mobile, AL
Default

Sounds plausible. But wouldn't it also happen at high rpm also seeing as how downshifting brings up rpms?
Reply
Old Jun 26, 2006 | 03:06 PM
  #5  
N4cer's Avatar
Thread Starter
10 Second Club
iTrader: (11)
 
Joined: Apr 2006
Posts: 2,526
Likes: 1
From: Ashland, KY
Default

But it doesn't. That's what's weird. I have tried multiple times and it doesn't happen under acceleration. And oil is full and I don't see any loose vacuum lines. Maybe we'll find something when I do my heads/cam/intake swap.
Reply
Old Jun 26, 2006 | 03:08 PM
  #6  
Justin00SS's Avatar
TECH Fanatic
iTrader: (5)
 
Joined: Feb 2006
Posts: 1,673
Likes: 2
From: Mobile, AL
Default

I would just take it real easy until then.
Reply
Old Jun 26, 2006 | 03:21 PM
  #7  
N4cer's Avatar
Thread Starter
10 Second Club
iTrader: (11)
 
Joined: Apr 2006
Posts: 2,526
Likes: 1
From: Ashland, KY
Default

Think so? It's nothing new. I just dislike it. Kinda reminds me of when I see an old hotrod at a car show that has a roots blower on it, how it has that little chirp chirp to it.
Reply
Old Jun 26, 2006 | 03:22 PM
  #8  
Justin00SS's Avatar
TECH Fanatic
iTrader: (5)
 
Joined: Feb 2006
Posts: 1,673
Likes: 2
From: Mobile, AL
Default

Its only when you downshift. Maybe something with the clutch. A little slippage maybe?
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

10 Reasons Daily Driving a Swap Project SUCKS! (& 1 Reason to Do It Anyway)

 Michael S. Palmer
story-1

6 Gifts Neither Your Dad Nor Grad Will Shove Into the 'Trinket Drawer'

 Brett Foote
story-2

Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

 Pouria Savadkouei
story-3

Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

 Verdad Gallardo
story-4

7 Most Reliable High-Performance Engines GM Has Ever Built

 Verdad Gallardo
story-5

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

 Verdad Gallardo
story-6

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

 Pouria Savadkouei
story-7

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

 Verdad Gallardo
story-8

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-9

Top 10 Most Powerful Chevy Trucks Ever Made!

 
Old Jun 26, 2006 | 03:27 PM
  #9  
N4cer's Avatar
Thread Starter
10 Second Club
iTrader: (11)
 
Joined: Apr 2006
Posts: 2,526
Likes: 1
From: Ashland, KY
Default

I dunno. Gonna talk to my tuner/mechanic, but it's definitely odd, since it's rhythmic. Not random, so I'm thinking valvetrain as well, but could be anything. I have a new clutch sitting here to toss in sometime. Maybe I'll do that soon too.
Reply




All times are GMT -5. The time now is 05:53 PM.

story-0
10 Reasons Daily Driving a Swap Project SUCKS! (& 1 Reason to Do It Anyway)

Slideshow: 10 reasons daily-driving a swap project might not be for you. Or is it?

By Michael S. Palmer | 2026-06-17 09:39:05


VIEW MORE
story-1
6 Gifts Neither Your Dad Nor Grad Will Shove Into the 'Trinket Drawer'

Don't get dad new socks or a grill brush this year.

By Brett Foote | 2026-06-09 14:55:56


VIEW MORE
story-2
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

Slideshow: We take a close look at the ONE and Artidiag 800BT2 diagnostic tools from Topdon and the reasons to buy one over the other.

By Pouria Savadkouei | 2026-06-18 10:26:23


VIEW MORE
story-3
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

Slideshow: The controversial Ferrari F6 swaps its original flat-12 for a Corvette Z06-derived LT4 V8 and sends power to four rear wheels through a custom-built drivetrain.

By Verdad Gallardo | 2026-05-26 18:23:54


VIEW MORE
story-4
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-5
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-6
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-7
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-8
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-9
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