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

Cylinder head problems

Thread Tools
 
Search this Thread
 
Old May 20, 2016 | 10:03 PM
  #1  
transwiz's Avatar
Thread Starter
TECH Enthusiast
iTrader: (26)
 
Joined: May 2006
Posts: 648
Likes: 1
Default Cylinder head problems

I have some cylinder heads that were on my t/a. I took them off because the guys that did my motor mods screwed everything up.They are ported and milled 317 castings. The valves were too big(2.08") intake. Anyway, I took them off because someone tightened the rocker arm bolts with a breaker bar.A couple of them stripped in the heads.

Here is a picture of the exhaust bolt hole. Can this be welded or put some type of helicoil. How would these be fixed? How
much trouble would it be ?
Attached Thumbnails Cylinder head problems-p5200003.jpg   Cylinder head problems-p5200004.jpg  
Reply
Old May 20, 2016 | 10:45 PM
  #2  
64post's Avatar
TECH Fanatic
Photogenic
Liked
Loved
Community Favorite
iTrader: (5)
 
Joined: Nov 2011
Posts: 1,710
Likes: 228
From: Sonoma Co. Ca.
Default

The end exhaust bolt hole looks to be too big now for an 8mm Time-cert. Weld them up and re drill them, many machine shops can do this.
Reply
Old May 21, 2016 | 12:43 AM
  #3  
transwiz's Avatar
Thread Starter
TECH Enthusiast
iTrader: (26)
 
Joined: May 2006
Posts: 648
Likes: 1
Default

What would something like that cost?
Reply
Old May 21, 2016 | 01:30 AM
  #4  
Burken01's Avatar
TECH Addict
20 Year Member
iTrader: (88)
 
Joined: Mar 2005
Posts: 2,925
Likes: 14
From: Anaheim, Ca
Default

Originally Posted by transwiz
What would something like that cost?
Just buy a $30 helicoil Kit from autozone

The next size up from the stock 8mm thread is a 10mm x 1.5 pitch

It should work, you'll just have to drill open the bolt hole on the header flange as well to accommodate the bigger bolt

Sent from my iPhone using IB AutoGroup
Reply
Old May 21, 2016 | 08:32 AM
  #5  
joyridin''s Avatar
TECH Enthusiast
10 Year Member
iTrader: (1)
 
Joined: Jan 2014
Posts: 628
Likes: 36
Default

Use a heavy duty Keensert. It has a large outside diameter. Drill, tap, install Keensert, and you are done.
Reply




All times are GMT -5. The time now is 07:38 PM.

story-0
6 Gifts Neither Your Dad Nor Grad Will Shove Into the 'Trinket Drawer'

Don't get dad new socks or a grill brush this year.

By Brett Foote | 2026-06-09 14:55:56


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