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

lq4 piston?

Thread Tools
 
Search this Thread
 
Old Feb 20, 2013 | 07:02 PM
  #1  
tom70's Avatar
Thread Starter
Launching!
10 Year Member
iTrader: (10)
 
Joined: Jun 2011
Posts: 279
Likes: 2
Default lq4 piston?

took heads off my lq4, pistons are dished but also have valve reliefs cut into them. is this factory?
Reply
Old Feb 20, 2013 | 09:57 PM
  #2  
Stumped1215's Avatar
Launching!
10 Year Member
iTrader: (9)
 
Joined: May 2011
Posts: 259
Likes: 0
From: Carlisle, PA
Default

no it is not.
Reply
Old Feb 21, 2013 | 08:36 AM
  #3  
tom70's Avatar
Thread Starter
Launching!
10 Year Member
iTrader: (10)
 
Joined: Jun 2011
Posts: 279
Likes: 2
Default

how do you measure valve reliefs?
Reply
Old Feb 23, 2013 | 07:01 AM
  #4  
87caprice318's Avatar
Launching!
iTrader: (1)
 
Joined: Nov 2011
Posts: 297
Likes: 2
From: louisiana
Default

Actually mine were the same and it was a STOCK lq4.pistons had valve reliefs cut in them from the factory..this was on a 2004 engine
Reply
Old Feb 23, 2013 | 01:42 PM
  #5  
tom70's Avatar
Thread Starter
Launching!
10 Year Member
iTrader: (10)
 
Joined: Jun 2011
Posts: 279
Likes: 2
Default

k thanks
Reply
Old Feb 24, 2013 | 08:50 PM
  #6  
tom70's Avatar
Thread Starter
Launching!
10 Year Member
iTrader: (10)
 
Joined: Jun 2011
Posts: 279
Likes: 2
Default

any one know why gm did this? where should I measure if I want to put a larger cam in later on? now I have 243 heads cnc machined. gm performance intake and msd 6010 ignition. going with an edelbrok 2216 cam for now. drag race only.
Reply
Old Feb 25, 2013 | 06:50 PM
  #7  
omc8's Avatar
TECH Fanatic
15 Year Member
iTrader: (7)
 
Joined: May 2009
Posts: 1,539
Likes: 26
From: columbus,ohio
Default

Originally Posted by Stumped1215
no it is not.
Originally Posted by 87caprice318
Actually mine were the same and it was a STOCK lq4.pistons had valve reliefs cut in them from the factory..this was on a 2004 engine
Yes this has confused many, but LQ4 pistons came both ways, with and without valve reliefs.
Reply




All times are GMT -5. The time now is 06:24 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