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

strange sound from engine

Thread Tools
 
Search this Thread
 
Old Jun 3, 2007 | 11:01 PM
  #1  
tjlowery's Avatar
Thread Starter
Teching In
 
Joined: Feb 2006
Posts: 3
Likes: 0
Default strange sound from engine

Hey all you motorheads out there, gotta a problem with my 97 TA that I can't seem to figure out.

The problem started about a month ago, I originally thought that it was and exhaust leak do to the sound, and because I knew that the drivers side y-pipe connection had a bad gasket. However as I was driving it, the sound got progressivlly worse, to the point that I had it towed for fear of damaging it more.

The exhaust gasket was replaced, but the sound is still there. It sounds almost as if some thing was hitting the oil pan (kind of a hollow thumping sound). It's not a clicking like the lifters make. The sound does increase when the RPMs increase, and sometimes the sound goes away briefly as the throttle is increased/decreased.

I have taken off the valve covers just to be sure that it was not a lifter problem. The sound appears to be centrally located (not on the drivers or passengers side only).

Any help you could send my way would be greatly appreciated. I don't want to have to take it in, if I can do it myself.

Thanks ya'll
Reply
Old Jun 3, 2007 | 11:47 PM
  #2  
mvvette97's Avatar
TECH Fanatic
20 Year Member
iTrader: (18)
 
Joined: Oct 2005
Posts: 1,767
Likes: 2
From: Leon Iowa
Default

sounds like you have bearing problems. Pull the oil pan and start checking the rod and main bearings
Reply
Old Jun 3, 2007 | 11:47 PM
  #3  
mvvette97's Avatar
TECH Fanatic
20 Year Member
iTrader: (18)
 
Joined: Oct 2005
Posts: 1,767
Likes: 2
From: Leon Iowa
Default

I assume this is an LT1
Reply
Old Jun 4, 2007 | 12:06 AM
  #4  
SRT2LS1's Avatar
On The Tree
iTrader: (12)
 
Joined: Sep 2006
Posts: 161
Likes: 0
From: Mansfield,TX
Default

Mine is doing sort of the same thing. It sounds like really loud clutch chatter, right below the dash too. It does it at idle at times and during driving every once in a while. I just had my tranny rebuilt and the shop told me that my tranny mount was bad, so im guessing its that cause I hadn't heard it before the rebuild. Maybe thats your problem too. keep us updated!
Reply
Old Jun 4, 2007 | 12:09 AM
  #5  
GMmexican's Avatar
TECH Fanatic
iTrader: (7)
 
Joined: Jan 2006
Posts: 1,607
Likes: 0
From: San Jose, CA
Default

dont worry its just piston slap....
Reply
Old Jun 4, 2007 | 10:29 AM
  #6  
tjlowery's Avatar
Thread Starter
Teching In
 
Joined: Feb 2006
Posts: 3
Likes: 0
Default

If it is piston slap, what would cause that? How do you correct it?

A bearing going out would cause that sort of sound? The sound becomes more frequent as the rpms increase.

If it is in fact worn bearings, what am I looking for when I pull the pan? Metal shavings? crankshaft play?
Reply




All times are GMT -5. The time now is 08:13 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