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

Is this a blown head gasket?

Thread Tools
 
Search this Thread
 
Old Dec 3, 2017 | 10:00 AM
  #21  
wph351's Avatar
Thread Starter
TECH Apprentice
iTrader: (3)
 
Joined: Jul 2016
Posts: 368
Likes: 1
Default

Was able to get the car out and drive for a bit today. Two 30 minute jaunts a few hours in between. The coolant level dropped slightly. Im not sure if its beause i didnt have the system bled properly or if its losing coolant.
I do have steam coming out of the tail pipes. Its not conistent steam, it seams to fluctuate in volume but definitely increases with rpm.
It will drop some water out of the tail pipes after a rev. It doesn't seem to be antifreeze though. Feels like water between the finger and doesnt have a smell.

Normally I would automatically think head gasket, but the cat back system that's on the car sat behind my garage for a year exposed to the elements. Maybe it has water in the muffler?
I suppose the next move is to top up the radiator and run it some more and see what happens.

Last edited by wph351; Dec 3, 2017 at 10:08 AM.
Reply
Old Dec 3, 2017 | 11:22 AM
  #22  
SheepDog209's Avatar
On The Tree
iTrader: (2)
 
Joined: May 2017
Posts: 141
Likes: 0
Default

Condensation from the exhaust is normal. Some mufflers and exhaust tips have weep holes for it. Looks like you're gonna need to pressure test your cooling system.
Reply
Old Dec 3, 2017 | 12:05 PM
  #23  
wph351's Avatar
Thread Starter
TECH Apprentice
iTrader: (3)
 
Joined: Jul 2016
Posts: 368
Likes: 1
Default

Originally Posted by SheepDog209
Condensation from the exhaust is normal. Some mufflers and exhaust tips have weep holes for it. Looks like you're gonna need to pressure test your cooling system.
I was able to top the coolant to the proper level. Decided to let it idle in the driveway for an extended period. Turned out to be an hour and a half total, with 4k revs every so often. The steam slowly became less and less till none at all. Upon checking the coolant level, it hasn't dropped at all!
I have room for optimism now. Will perform the test After the car is 100% cool.
If the steam returns in bulk volume, it will be time for a pressure test.
Reply
Old Dec 3, 2017 | 01:07 PM
  #24  
SheepDog209's Avatar
On The Tree
iTrader: (2)
 
Joined: May 2017
Posts: 141
Likes: 0
Default

Cool! Good luck
Reply
Old Dec 3, 2017 | 06:10 PM
  #25  
wph351's Avatar
Thread Starter
TECH Apprentice
iTrader: (3)
 
Joined: Jul 2016
Posts: 368
Likes: 1
Default

Steam has returned. This car needs head gaskets. The steam is very wet.
Reply
Old Dec 3, 2017 | 06:17 PM
  #26  
SheepDog209's Avatar
On The Tree
iTrader: (2)
 
Joined: May 2017
Posts: 141
Likes: 0
Default

Make sure the heads aren't cracked once they're off.
Reply
Old Dec 4, 2017 | 01:39 PM
  #27  
.boB's Avatar
TECH Resident
iTrader: (1)
 
Joined: Jan 2014
Posts: 897
Likes: 33
From: Colorado Springs, CO
Default

Originally Posted by wph351
Steam has returned. This car needs head gaskets. The steam is very wet.
Well, of course it is. It's vaporized water.

Before taking anything apart, do the cooling system test. It's free and doesn't take long. Proper diagnosis is critical to the repair.
Reply
Old Dec 4, 2017 | 03:57 PM
  #28  
00pooterSS's Avatar
TECH Veteran
15 Year Member
Photogenic
Liked
Community Favorite
iTrader: (40)
 
Joined: Mar 2008
Posts: 4,920
Likes: 531
From: Dallas
Default

At least heads are really easy on these cars..

Make sure and get the right gasket, if it has early heads with divets in them you have to get the specific gasket for them. If the deck is 100% flat, no divet, then whatever gasket is good.

Thing is, why did it pop a gasket.. It's not necessarily common so i'd look for the why it did it and make sure and repair that as well.

Best of luck man
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 Dec 4, 2017 | 05:05 PM
  #29  
wph351's Avatar
Thread Starter
TECH Apprentice
iTrader: (3)
 
Joined: Jul 2016
Posts: 368
Likes: 1
Default

Originally Posted by 00pooterSS
At least heads are really easy on these cars..

Make sure and get the right gasket, if it has early heads with divets in them you have to get the specific gasket for them. If the deck is 100% flat, no divet, then whatever gasket is good.

Thing is, why did it pop a gasket.. It's not necessarily common so i'd look for the why it did it and make sure and repair that as well.

Best of luck man
Was there sarcasm mixed in there? Hard to tell when reading text.

While not a complex procedure, I'm a big dude and working under the cowl is rough on me. Im considering dropping it out and doing the gaskets and a few other items.

Hard to say why it has happened. I bought the car that way. There is a set of fresh 799s on the shelf here that I'll put on when this job takes place.

What's wierd is, it doesn't steam all the time. And doesn't lose antifreeze all the time. The longer the motor runs, the less steam I get from the pipes. After about a 45 minute run this evening, Nothing visible from the pipes when I got home.

Very small leak into the cylinder me thinks.
Reply
Old Dec 4, 2017 | 05:29 PM
  #30  
SheepDog209's Avatar
On The Tree
iTrader: (2)
 
Joined: May 2017
Posts: 141
Likes: 0
Default

It's not unusual for the exhaust to develop condensation and therefore steam as the water burns out. It's going to be more prevalent in colder weather. Dies it smell "sweet"? Coolant has a "sweet" smell when burned. Pressure test the system before you tear it apart.
Reply
Old Dec 4, 2017 | 05:36 PM
  #31  
wph351's Avatar
Thread Starter
TECH Apprentice
iTrader: (3)
 
Joined: Jul 2016
Posts: 368
Likes: 1
Default

Originally Posted by SheepDog209
It's not unusual for the exhaust to develop condensation and therefore steam as the water burns out. It's going to be more prevalent in colder weather. Dies it smell "sweet"? Coolant has a "sweet" smell when burned. Pressure test the system before you tear it apart.
My sense of smell is very weak so I'm not sure. My stepdad said he thought he smelled the sweet. I have a few LS powered vehicles, and none of them put out anything from the exhaust close to what this one does. The rear bumper cutouts will get soaked to the point of dripping!

But alas yes. I know you are right. If it loses pressure it's almost certainly a head gasket as I can't find anything in the way of coolant leaks. And it's for sure losing coolant, albeit slightly.
Reply
Old Dec 4, 2017 | 05:45 PM
  #32  
SheepDog209's Avatar
On The Tree
iTrader: (2)
 
Joined: May 2017
Posts: 141
Likes: 0
Default

It could also be a cracked head or block (not as likely). The pressure test only takes s few minutes. that's your best bet.
Reply




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

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