New LS1 Owners - Newbie Tech Basic Technical Questions & Advice
Sponsored by:
Sponsored by:

Noob Question

Thread Tools
 
Search this Thread
 
Old Aug 16, 2020 | 06:02 PM
  #1  
JaceDaniel83's Avatar
Thread Starter
On The Tree
 
Joined: Aug 2020
Posts: 104
Likes: 26
From: Oklahoma City, Oklahoma
Default Hello! 99 LS1 T/A

I have a 99’ 30th anniversary trans am #861. Has 40,xxx miles and I’m the second owner. I’ve put only 800 miles on the car but I’ve owned the car since 2002. It also has not ran since 2002. Long story short. Had bent push rods after I drove it for roughly 600-800 miles twice. Dealership wanted to replace the motor. Extended warranty company did not want to pay. So the car sat in my garage with the top end off of it since 2002. Finally getting it fixed (another long story I won’t get into today).
What I have is multiple piston heads (3) have a gouge from making contact with the heads. (I have pictures if you would like to see) What I’m needing, I’m guessing?? Is the Engine out of the car. Torn down to block. Inspect the block, rebuild the motor. Then get the car back running. Check all lines and flush Gas tank, etc. Finding that person is where I’m at now. Finding a LS1/F body mechanic shop locally might be a problem in Oklahoma.
Just wanted to say hello
Reply
Old Aug 17, 2020 | 02:12 PM
  #2  
JaceDaniel83's Avatar
Thread Starter
On The Tree
 
Joined: Aug 2020
Posts: 104
Likes: 26
From: Oklahoma City, Oklahoma
Default Noob Question

My 99 LS1 had problems from the moment I bought it *used... help a noob out. Help explain this to me. I bought the car (1999 30th anniversary Trans Am) with 40,xxx miles. After 600ish miles I got a knock it was a bent push rod. They replaced it. 100-200 miles later it happened again. They pulled the oil pan and found metal shavings in the oil pan. When the top end was removed you can see roughly 2-4 piston heads with marks from hitting the heads.

im sure this could be multiple things but what are a couple of things that could cause this? I have no idea and would love to finally get some info on this. Thanks
Reply
Old Aug 17, 2020 | 04:28 PM
  #3  
RPM WS6's Avatar
LS1Tech Administrator
20 Year Member
Shutterbug
Community Builder
Community Influencer
iTrader: (3)
 
Joined: Nov 2001
Posts: 34,643
Likes: 2,571
From: Schiller Park, ILL Member: #317
Default

Is this car a manual? A mechanical overrev can certainly lead to bent push rods. The stock valve springs are not very strong and don't do well much above the factory rev limiter, so valve float can be expected with a mechanical overrev. Sometimes this can even happen just from hitting the stock limiter too hard (even without accidentally downshifting), but more so if you've raised the limiter beyond the factory 6200rpm.
Reply
Old Aug 17, 2020 | 05:45 PM
  #4  
JaceDaniel83's Avatar
Thread Starter
On The Tree
 
Joined: Aug 2020
Posts: 104
Likes: 26
From: Oklahoma City, Oklahoma
Default

Originally Posted by RPM WS6
Is this car a manual? A mechanical overrev can certainly lead to bent push rods. The stock valve springs are not very strong and don't do well much above the factory rev limiter, so valve float can be expected with a mechanical overrev. Sometimes this can even happen just from hitting the stock limiter too hard (even without accidentally downshifting), but more so if you've raised the limiter beyond the factory 6200rpm.
yes it’s a manual. I think I remember the tech saying “high engine revving” or something to that degree along time ago. I figured it was something major, bottom end possibly? But I have no knowledge and that’s why I’m here.
Reply
Old Aug 17, 2020 | 11:30 PM
  #5  
Chpbstrd's Avatar
Teching In
 
Joined: Aug 2020
Posts: 22
Likes: 2
Default

This is why I always tear down any engine that I bought used. Then again, I only buy cars with engine issues.
Reply
Old Aug 18, 2020 | 06:13 AM
  #6  
JaceDaniel83's Avatar
Thread Starter
On The Tree
 
Joined: Aug 2020
Posts: 104
Likes: 26
From: Oklahoma City, Oklahoma
Default

I was 18 and knew nothing of engines, knock noises. Learned pretty quick on buying a uses sports car for sure. Expensive lesson learned.
Reply
Old Aug 18, 2020 | 11:15 PM
  #7  
Chpbstrd's Avatar
Teching In
 
Joined: Aug 2020
Posts: 22
Likes: 2
Default

At 18, I had an Impala, a shitty one but it got me where I needed to go. The best thing was it had a huge back seat . I'd probably be dead if I had a Trans Am or motorcycle at that age.
Reply
Old Aug 19, 2020 | 06:30 AM
  #8  
JaceDaniel83's Avatar
Thread Starter
On The Tree
 
Joined: Aug 2020
Posts: 104
Likes: 26
From: Oklahoma City, Oklahoma
Default

Originally Posted by Chpbstrd
At 18, I had an Impala, a shitty one but it got me where I needed to go. The best thing was it had a huge back seat . I'd probably be dead if I had a Trans Am or motorcycle at that age.
lol. Well I drove my trans am for about 1 month before it was tore down and I haven’t drove it since. So it may have been my dads plan to not get it fixed so I wouldn’t kill myself. Lol.
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

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

 Pouria Savadkouei
story-1

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

 Verdad Gallardo
story-2

7 Most Reliable High-Performance Engines GM Has Ever Built

 Verdad Gallardo
story-3

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

 Verdad Gallardo
story-4

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

 Pouria Savadkouei
story-5

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

 Verdad Gallardo
story-6

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-7

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-8

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-9

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

 Verdad Gallardo




All times are GMT -5. The time now is 12:50 AM.

story-0
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 | 2026-05-28 11:05:11


VIEW MORE
story-1
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-2
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-3
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-4
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-5
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-6
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-7
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-8
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-9
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