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

how hard PTV to ruin valves

Thread Tools
 
Search this Thread
 
Old Feb 25, 2012 | 11:46 PM
  #1  
3rdCoastPowerSports's Avatar
Thread Starter
TECH Fanatic
iTrader: (5)
 
Joined: Jun 2011
Posts: 1,154
Likes: 6
From: Loony Bin
Default how hard PTV to ruin valves

PTV contact on all 8 pistons. contact is very very slight and is the intake valves only. valves visually look ok. pistons just have a tiny tiny nick that is barley visible. are the intake valves messed up now? is there any way to check? visually they look ok.

motor is torn down so no way to do a leak down test
Reply
Old Feb 25, 2012 | 11:57 PM
  #2  
Uneverknow's Avatar
11 Second Club
10 Year Member
iTrader: (1)
 
Joined: Oct 2011
Posts: 295
Likes: 1
Default

Pics would help. Maybe assembly one head and rocker assembly and do a leak down.
Reply
Old Feb 26, 2012 | 02:47 AM
  #3  
chrisfrost's Avatar
TECH Fanatic
15 Year Member
iTrader: (8)
 
Joined: Nov 2009
Posts: 1,112
Likes: 16
From: phx the cactus patch
Default

With the springs, keepers and locks off and some valve grinding compound You can tell by listening and feel if the valves are contacting the seats all the way around . Also with them dry open and close each 1 at a time ,,,,,,,,,when You're closing them there is a distinct sound the valve and seat make when they contact each other,,,,,,,,,,,You can tell ,,,,,,,,,I seriously doubt You bent any valves as the valves are very strong and to bend 1 or all of them there would be significant damage to the pistons ,,,,,,,,,,,,much more than a small nick ,,,,,,,,,,,You got lucky it sounds

Spin each valve in it's guide and You'll see any bend even the smallest bend You'll be able to see when You spin it ,,,,,,,,,,,,spin it not seated and with lub in the guide .
Reply
Old Feb 27, 2012 | 10:49 AM
  #4  
buschmec's Avatar
Teching In
 
Joined: Jan 2012
Posts: 20
Likes: 0
Default bent

just lap the valves and watch the pattern on the valve itself. should see a nice contact ring all the way around........
Reply
Old Feb 27, 2012 | 10:58 AM
  #5  
RonSSNova's Avatar
8 Second Club
10 Year Member
Photogenic
Photoriffic
Top Answer: 1
iTrader: (3)
 
Joined: Aug 2011
Posts: 4,732
Likes: 815
From: Portland, OR
Default

If the heads are assembled, spray brake clean in the ports with the chamber down and see if they leak.

Ron
Reply




All times are GMT -5. The time now is 11:18 AM.

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