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

706 castech head crack question

Thread Tools
 
Search this Thread
 
Old Sep 12, 2017 | 02:48 PM
  #1  
TrendSetter's Avatar
Thread Starter
TECH Addict
20 Year Member
Photogenic
Photoriffic
Shutterbug
 
Joined: Dec 2004
Posts: 2,178
Likes: 627
From: Florida
Default 706 castech head crack question

i am throwing together a budget 5.3 and have two sets of 706 castech heads. If my memory is right, one is from 06 and one is from a 05.
Is the crack issue something that happens right away or am I at risk even with heads that don't show signs of water at the bolt holes?
id rather use the heads I have but I'm going to be annoyed if I put work into a set of time bombs.
Thanks
Reply
Old Sep 12, 2017 | 03:20 PM
  #2  
etijsma's Avatar
Launching!
 
Joined: Oct 2013
Posts: 239
Likes: 0
Default

Are you sure they are castechs? I have a set of 706's from an 05 that are not.
Reply
Old Sep 12, 2017 | 04:36 PM
  #3  
TrendSetter's Avatar
Thread Starter
TECH Addict
20 Year Member
Photogenic
Photoriffic
Shutterbug
 
Joined: Dec 2004
Posts: 2,178
Likes: 627
From: Florida
Default

I checked both sets and they have that rectangle battery logo
Reply
Old Sep 12, 2017 | 05:06 PM
  #4  
etijsma's Avatar
Launching!
 
Joined: Oct 2013
Posts: 239
Likes: 0
Default

Gotcha. I went thru the same thoughts until I researched and found were not.

I wouldnt risk risk it personally on something that was going to be performance oriented but If it was my beater I would if I had nothing else.

where are you located? I have 2 sets of 862's? I would be willing get rid of a set if interested.
Reply
Old Sep 13, 2017 | 06:57 AM
  #5  
cookseyb's Avatar
TECH Resident
 
Joined: Apr 2010
Posts: 926
Likes: 18
From: Central Texas
Default

Try BBJ auto cores on E-Bay for good rebuildable heads and other "STUFF"
Reply
Old Sep 13, 2017 | 09:07 AM
  #6  
TrendSetter's Avatar
Thread Starter
TECH Addict
20 Year Member
Photogenic
Photoriffic
Shutterbug
 
Joined: Dec 2004
Posts: 2,178
Likes: 627
From: Florida
Default

i guess ill run what i have. worst case i have four tries to get two right.
i would consider a set of 243s but i havent found any for enough of a deal to justify it this time around.
Reply
Old Sep 13, 2017 | 10:20 AM
  #7  
G Atsma's Avatar
TECH Senior Member
5 Year Member
Liked
Loved
Community Favorite
 
Joined: Jun 2016
Posts: 22,308
Likes: 3,625
From: Central Cal.
Default

If you want 243's, also look at 799's; they are identical to 243's, except sand cast instead of die cast, which does not matter functionally.
Reply




All times are GMT -5. The time now is 07:45 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