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

GTO knocking...

Thread Tools
 
Search this Thread
 
Old Dec 8, 2010 | 03:51 PM
  #1  
huggmess's Avatar
Thread Starter
Staging Lane
 
Joined: Jul 2009
Posts: 78
Likes: 1
From: BFE, Louisiana
Default GTO knocking...

My friend has an 04 gto 6 speed...he said when he cranked it this morning that it clattered real bad and sounded like he was throwing a rod...said as soon as it warmed up it went away...any ideas as to what's going on? Had been sitting about a month so it may have lost oil in the heads but it did it again later that day after it had been driven about 30 miles and let cool all the way down...any help would be appreciated!
Reply
Old Dec 8, 2010 | 04:00 PM
  #2  
KevinR's Avatar
TECH Fanatic
 
Joined: Jan 2010
Posts: 1,219
Likes: 0
From: Euless Tx
Default

piston slap maybe? At least that's what it sounds like
Reply
Old Dec 8, 2010 | 04:03 PM
  #3  
Canbarelygo's Avatar
Launching!
 
Joined: Feb 2010
Posts: 277
Likes: 1
From: Shawnee, OK
Default

fo sho. on a real cold morning my car sounds like its knocking its *** off till it warms up a tad
Reply
Old Dec 8, 2010 | 04:15 PM
  #4  
huggmess's Avatar
Thread Starter
Staging Lane
 
Joined: Jul 2009
Posts: 78
Likes: 1
From: BFE, Louisiana
Default

Dunno...my car doesn't do it...but who knows...is there anything harmful going on or just something the us ls1 guys have to deal with?
Reply
Old Dec 8, 2010 | 04:21 PM
  #5  
KevinR's Avatar
TECH Fanatic
 
Joined: Jan 2010
Posts: 1,219
Likes: 0
From: Euless Tx
Default

It's just the nature of the beast. Mine does it. And no, it won't hurt anything. It's just really annoying.
Reply
Old Dec 8, 2010 | 05:10 PM
  #6  
huggmess's Avatar
Thread Starter
Staging Lane
 
Joined: Jul 2009
Posts: 78
Likes: 1
From: BFE, Louisiana
Default

thanks for the info
Reply
Old Dec 8, 2010 | 10:02 PM
  #7  
ae13291's Avatar
Banned
iTrader: (8)
 
Joined: Jun 2007
Posts: 3,093
Likes: 1
From: san fernando valley, california
Default

some cars have that piston slap and some dont. does he have a delayed oil psi on start up?
Reply
Old Dec 9, 2010 | 04:34 AM
  #8  
huggmess's Avatar
Thread Starter
Staging Lane
 
Joined: Jul 2009
Posts: 78
Likes: 1
From: BFE, Louisiana
Default

I don't know...maybe...I'll check when I see him
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!

 




All times are GMT -5. The time now is 03:31 AM.

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