Head

Reply Subscribe

Thread Tools

Search this Thread

May 21, 2009 | 09:55 AM

07SS

Thread Starter

Registered User

Joined: Apr 2009

Posts: 12

Likes: 0

Head

While I was running the nitrous the spark plug in the #7 cylinder broke and the part of the spark plug that broke went through my exhaust valve. It damaged the head pretty bad as well. Does anyone know where I can get a replacement head? I have tried a few places and no one seems to have it.

May 21, 2009 | 11:08 AM

Bryan921SS

TECH Enthusiast

Joined: Jun 2008

Posts: 621

Likes: 1

From: Zeeland, MI

Get the 5.3 stage 2.5 heads...upgrade for more power...other wise i think we are a normal LS6 243 casting...not sure though

May 21, 2009 | 11:16 AM

RickAKATed10

TECH Resident

iTrader: (1)

Joined: Feb 2009

Posts: 785

Likes: 0

From: Highland, IN

The thread title confused me... Carry on!

May 21, 2009 | 11:30 AM

Panther427

TECH Fanatic

Joined: Feb 2009

Posts: 1,401

Likes: 1

I will see if there is any 243 heads around my parts.

May 21, 2009 | 12:02 PM

Pauls325

TECH Resident

iTrader: (1)

Joined: May 2008

Posts: 800

Likes: 1

From: Minnetonka,MN or Fargo

wow nitrous guys are having problems huh

May 21, 2009 | 12:10 PM

Mels SS

TECH Junkie

iTrader: (1)

Joined: Jun 2007

Posts: 3,159

Likes: 0

From: New Orleans La

If they are using a dry shot thats the problem. On these motors only use a wet shot

May 21, 2009 | 12:19 PM

Panther427

TECH Fanatic

Joined: Feb 2009

Posts: 1,401

Likes: 1

Ya but rosko was using wet shot i thought. number seven is a bitch. My buddy with his GTO had Number seven hole go twice with a chipped piston in a month

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

Verdad Gallardo

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

Pouria Savadkouei

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

Verdad Gallardo

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Pouria Savadkouei

Top 10 Most Powerful Chevy Trucks Ever Made!

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Verdad Gallardo

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

Verdad Gallardo

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Verdad Gallardo

10 Camaros You Should Never Buy

10 LS Engine Myths That Refuse to Die

Verdad Gallardo

May 21, 2009 | 01:25 PM

TiredGXP

TECH Enthusiast

iTrader: (2)

Joined: Dec 2007

Posts: 677

Likes: 0

From: Sherwood Park, AB

You might want to research valve sizes if you're changing heads. The 243 heads on the LS4 have smaller valves than many of the LS1/2/6 heads out there. Probably has something to do with a 96mm bore instead of the 99mm LS1/6 bore.

I don't recall any threads that specifically discussed running heads with larger valves.

May 21, 2009 | 02:25 PM

#10

Sittingmongoose

TECH Resident

iTrader: (1)

Joined: Sep 2008

Posts: 898

Likes: 1

From: Philly

i know that there is a junk yard by me with a gxp, you can prolly pull the heads off that ones. The website is http://www.alsautopa.com/index.html call them and they might have one cheap for you. maybe they can ship you it.

May 21, 2009 | 10:31 PM

#11

CenTexSS

TECH Fanatic

iTrader: (2)

Joined: Feb 2009

Posts: 1,398

Likes: 0

From: Killeen, Texas.

I wonder if it's something in the intake manifold causing cylinder 7 to go lean while spraying. Maybe the distribution of air in the runners is not getting enough to cyl 7

May 21, 2009 | 11:24 PM

#12

Panther427

TECH Fanatic

Joined: Feb 2009

Posts: 1,401

Likes: 1

Quote:

Originally Posted by CenTexSS

I wonder if it's something in the intake manifold causing cylinder 7 to go lean while spraying. Maybe the distribution of air in the runners is not getting enough to cyl 7

well there is the large obstruction in the opeing could be directing air away from number seven.

May 22, 2009 | 01:29 AM

#13

StealthV8

TECH Resident

iTrader: (1)

Joined: May 2008

Posts: 763

Likes: 0

From: Ontario, Canada

Quote:

Originally Posted by Mels SS

If they are using a dry shot thats the problem. On these motors only use a wet shot

I believe they both were using wet shots

May 22, 2009 | 08:51 AM

#14

tokay57

On The Tree

Joined: Aug 2007

Posts: 121

Likes: 0

Quote:

Originally Posted by Panther427

well there is the large obstruction in the opeing could be directing air away from number seven.

woudn't that cause a rich condition, too much fuel per given air/nitrous mix.

May 22, 2009 | 10:59 AM

#15

Panther427

TECH Fanatic

Joined: Feb 2009

Posts: 1,401

Likes: 1

Ya maybe number 6 and 8 are rich while 7 goes lean

May 22, 2009 | 11:26 AM

#16

07SS

Thread Starter

Registered User

Joined: Apr 2009

Posts: 12

Likes: 0

thanks for your help guys. I found a head and if all goes as planned the car should be running again by the end of this weekend. Yeah, I was running a wet shot. Do you guys think there is a chance that other cylinders were damaged and I could run into some issues down the road? I did a compression check on the other cylinders and everything looks fine, but I didn't take the other head off and take a look at the valves on the right head.

May 22, 2009 | 02:43 PM

#17

supercatxr7

TECH Enthusiast

iTrader: (5)

Joined: Aug 2007

Posts: 628

Likes: 2

Just curious what did your compression check show for psi?

May 22, 2009 | 04:12 PM

#18

radorider03

Launching!

Joined: Apr 2005

Posts: 283

Likes: 0

From: Springfield MO

You might want to pull that other head and check it out just to be safe. Its a long weekend anyway tons of fun. Let us know whats going on with the nitrous I want to spray mine too.

May 23, 2009 | 06:56 AM

#19

TurboMatt

Registered User

Joined: May 2009

Posts: 1

Likes: 0

As long as none of the other plugs are broken or melted, and the pistons that are currently visible look okay, then I wouldn't bother pulling the other head. Sounds like you've got enough to do already.