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

Think I installed a head gasket backwards.

Thread Tools
 
Search this Thread
 
Old Jun 18, 2018 | 05:09 AM
  #1  
8.Lug's Avatar
Thread Starter
TECH Enthusiast
 
Joined: Nov 2016
Posts: 711
Likes: 6
From: PNW
Default Think I installed a head gasket backwards.

Up for a day and a half in a mad rush to get the car together and to the track, think I installed the bank 2 gasket backwards. Bank 2 temp drops down to 170-180 on the highway, up to 220 in traffic, spiked to 240 after 3 laps on the track - however bank 1 steady around 195-205. Haven’t lost any coolant, and I’ve purged the system same as always. Sound like a backwards gasket to any of you?
Reply
Old Jun 18, 2018 | 08:44 AM
  #2  
thompson's Avatar
Banned
iTrader: (4)
 
Joined: Jan 2010
Posts: 914
Likes: 17
Default

What head gasket did you use?

If GM MLS it is really easily diagnose. Look at the tab that sticks out from between the block and head. The tab should be between the first and second head bolt hole. If it is there you are OK, If it is between the 3-4 you have it backwards.
Reply
Old Jun 18, 2018 | 09:58 AM
  #3  
8.Lug's Avatar
Thread Starter
TECH Enthusiast
 
Joined: Nov 2016
Posts: 711
Likes: 6
From: PNW
Default

Unfortunately it’s a fel pro, no tab. It’s all I could get my hands on with my time constraints.
Reply
Old Jun 18, 2018 | 10:57 AM
  #4  
truckdoug's Avatar
9 Second Club
10 Year Member
Liked
Loved
Community Favorite
iTrader: (26)
 
Joined: Nov 2013
Posts: 6,389
Likes: 558
From: Portlandia
Default

the fel pro has a visible rivet in the corner. examine the side that you think is correct and compare to the other. one side of the rivet will have smooth edges, the other is a little rough were the press pin came through
Reply
Old Jun 18, 2018 | 05:44 PM
  #5  
Che70velle's Avatar
ModSquad
10 Year Member
Community Builder
Liked
Loved
iTrader: (6)
 
Joined: Jan 2012
Posts: 7,832
Likes: 5,177
From: Dawsonville Ga.
Default

Pull the water pump, and feel with your finger up into the cylinder head water passage. If it’s blocked, your backwards.
Reply
Old Jun 18, 2018 | 10:55 PM
  #6  
8.Lug's Avatar
Thread Starter
TECH Enthusiast
 
Joined: Nov 2016
Posts: 711
Likes: 6
From: PNW
Default

One side is definitely different than the other which should mean they’re both oriented the same way. Was trying not to have to pull the pump off if I don’t have to since that means the front of the car has to come off.



Last edited by 8.Lug; Jun 19, 2018 at 04:22 AM.
Reply




All times are GMT -5. The time now is 08:46 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