Generation IV External Engine LS2 | LS3 | LS7 | L92 | Bolt-Ons | Intakes | Exhaust | Ignition | Accessories
Sponsored by:
Sponsored by:

LS3 head rebuild how to

Thread Tools
 
Search this Thread
 
Old Oct 22, 2014 | 08:31 PM
  #1  
silent_soul's Avatar
Thread Starter
Launching!
iTrader: (2)
 
Joined: Mar 2013
Posts: 252
Likes: 0
From: Florida
Default LS3 head rebuild how to

Im looking to pick up some used LS3 heads. Plan to have a shop clean them up.

I dont know what all is needed in the way of machining them. I plan to put them on a ls2 with a LSA blower.

What tools are need? I understand Ill need to remove the rockers, compress the springs remove the caps. Install new springs and caps and reinstall the rockers. However the tools and how to do this I dont know.

I also have no idea what lifters and pushrods to use. I was thinking of getting a custom grind cam for the setup. Any help would be appreciated.
Reply
Old Oct 23, 2014 | 09:41 AM
  #2  
KCS's Avatar
KCS
Moderator
20 Year Member
Liked
Loved
Community Favorite
iTrader: (20)
 
Joined: Mar 2005
Posts: 8,859
Likes: 323
From: Conroe, TX
Default

Originally Posted by silent_soul
Im looking to pick up some used LS3 heads. Plan to have a shop clean them up.

I dont know what all is needed in the way of machining them. I plan to put them on a ls2 with a LSA blower.

What tools are need? I understand Ill need to remove the rockers, compress the springs remove the caps. Install new springs and caps and reinstall the rockers. However the tools and how to do this I dont know.

I also have no idea what lifters and pushrods to use. I was thinking of getting a custom grind cam for the setup. Any help would be appreciated.
You could usually just drop the heads off at the machine shop for them to disassemble, clean, machine, and reassemble. If you prefer to assemble the heads yourself, which I would recommend, they'll usually give them back disassembled. This way, you can setup the springs for your cam yourself as well as check behind the machinist's work.

I just had a pair of 799 heads that I got back from the machine shop that, after checking their work, I am not too happy with. I could put together a short write up with pictures today if it would help you.
Reply
Old Oct 23, 2014 | 10:00 AM
  #3  
LivernoisMotorsports's Avatar
FormerVendor
iTrader: (1)
 
Joined: Oct 2004
Posts: 1,204
Likes: 1
From: Dearborn Heights, MI
Default

Send them to us.
Give us some $'s.
Wait a week or two and install your as new heads ready to go.
We use the O.E. rockers so going cathedral to rec port you will need a minimum of the 8 offset rockers and the other 8 if they have more than 50000 miles on them.
We also offer some nice rocker bars with ARP hardware for some more valve train stability.
We use the O.E. LS2/7 lifters.
As far as pushrod length goes you will need to mock that up to determine correct geometry. We can send you the ones we think will be closest but you will have to check.
We can set you up with a nice camshaft to compliment your package as well.
Reply
Old Oct 23, 2014 | 05:06 PM
  #4  
silent_soul's Avatar
Thread Starter
Launching!
iTrader: (2)
 
Joined: Mar 2013
Posts: 252
Likes: 0
From: Florida
Default

Originally Posted by KCS
You could usually just drop the heads off at the machine shop for them to disassemble, clean, machine, and reassemble. If you prefer to assemble the heads yourself, which I would recommend, they'll usually give them back disassembled. This way, you can setup the springs for your cam yourself as well as check behind the machinist's work.

I just had a pair of 799 heads that I got back from the machine shop that, after checking their work, I am not too happy with. I could put together a short write up with pictures today if it would help you.
I figured doing the work myself wouldnt be hard and would save me money. Along with being a learning point. Id greatly appreciate a write up.

Originally Posted by LivernoisMotorsports
Send them to us.
Give us some $'s.
Wait a week or two and install your as new heads ready to go.
We use the O.E. rockers so going cathedral to rec port you will need a minimum of the 8 offset rockers and the other 8 if they have more than 50000 miles on them.
We also offer some nice rocker bars with ARP hardware for some more valve train stability.
We use the O.E. LS2/7 lifters.
As far as pushrod length goes you will need to mock that up to determine correct geometry. We can send you the ones we think will be closest but you will have to check.
We can set you up with a nice camshaft to compliment your package as well.
Ill try and give you guys a call tomorrow. I talked to a couple places and your the first to say I need to mess with the rockers. I was told best bet run oem length rockers and compensate for possible valve issues by changing pushrod length. I was looking to run LS7 lifters, hardened push rods and correct length for cam. Stock rockers.
Reply
Old Oct 23, 2014 | 06:28 PM
  #5  
KCS's Avatar
KCS
Moderator
20 Year Member
Liked
Loved
Community Favorite
iTrader: (20)
 
Joined: Mar 2005
Posts: 8,859
Likes: 323
From: Conroe, TX
Default

Originally Posted by silent_soul
I figured doing the work myself wouldnt be hard and would save me money. Along with being a learning point. Id greatly appreciate a write up.
I updated my Build Thread and detailed what I checked. Let me know if you have any questions about any of the tools or anything.
Reply




All times are GMT -5. The time now is 05:40 PM.

story-0
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-1
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-2
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-3
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-4
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-5
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-6
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-7
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-8
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-9
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