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

Bent pushrods=Bent valves???

Thread Tools
 
Search this Thread
 
Old Jul 17, 2006 | 01:43 PM
  #21  
GuitsBoy's Avatar
TECH Senior Member
iTrader: (4)
 
Joined: Apr 2003
Posts: 6,249
Likes: 3
From: Long Island, NY
Default

pushrods = cheap and easy, valves are more expensive and require a ton of labor.
Reply
Old Jul 17, 2006 | 02:03 PM
  #22  
white2001s10's Avatar
TECH Fanatic
iTrader: (4)
 
Joined: May 2002
Posts: 1,851
Likes: 0
From: Fairview Heights Illinois
Default

Originally Posted by blue99SS
I bent my pushrods a while back, had them replaced and the motor runs smooth and feels fine. Just talked to my buddy's mechanic and he said that if I bent to pushrods then the valves are probably bent too and that you can really only tell on a leakdown test.
The mechanic is correct. Many engines seem to run fine with only slightly bent valves, but it's not a good idea. Anytime there is piston to valve contact while running, there is increased chance of valve failure.
Reply
Old Jul 18, 2006 | 10:52 PM
  #23  
blue99SS's Avatar
Thread Starter
Launching!
 
Joined: Nov 2005
Posts: 240
Likes: 0
From: Thornton, Colorado
Default

Originally Posted by white2001s10
The mechanic is correct. Many engines seem to run fine with only slightly bent valves, but it's not a good idea. Anytime there is piston to valve contact while running, there is increased chance of valve failure.
So your saying that everytime a stock pushrod gets bent so do the valve/'s? The car runs smooth, has good oil pressure and sounds good. If the valves were even just slightly bent wouldn't the car at least sound a little "off"? Also, my car is in the shop as we speak having spray and full exhaust put on and I asked my mechanic (who replaced the p'rod's) and he said the valves were fine. Any more input? I've done some searches and this subject seems to be about 50/50, some guys say bent valves while others say the (stock)p'rods are made to be the weak link and break/bend first.

Last edited by blue99SS; Jul 18, 2006 at 11:03 PM.
Reply
Old Jul 19, 2006 | 12:20 AM
  #24  
stang90gt50's Avatar
Banned
iTrader: (6)
 
Joined: Mar 2006
Posts: 271
Likes: 2
From: CA
Default

From the several cars with the exact same situation as yours I have repaired....if you have no reason to believe there is a problem with a bent valve, then dont go overboard assuming it is.

Only bent valve ls1's from PtV contact have had chromemoly pushrods in them that i have fixed...
Reply
Old Jul 19, 2006 | 09:50 AM
  #25  
GuitsBoy's Avatar
TECH Senior Member
iTrader: (4)
 
Joined: Apr 2003
Posts: 6,249
Likes: 3
From: Long Island, NY
Default

Originally Posted by blue99SS
So your saying that everytime a stock pushrod gets bent so do the valve/'s? The car runs smooth, has good oil pressure and sounds good. If the valves were even just slightly bent wouldn't the car at least sound a little "off"? Also, my car is in the shop as we speak having spray and full exhaust put on and I asked my mechanic (who replaced the p'rod's) and he said the valves were fine. Any more input? I've done some searches and this subject seems to be about 50/50, some guys say bent valves while others say the (stock)p'rods are made to be the weak link and break/bend first.
Like I said before, 19 out of 20 cars will bend stock pushrods before bending a valve.
Reply
Old Jul 19, 2006 | 11:29 AM
  #26  
white2001s10's Avatar
TECH Fanatic
iTrader: (4)
 
Joined: May 2002
Posts: 1,851
Likes: 0
From: Fairview Heights Illinois
Default

Originally Posted by blue99SS
So your saying that everytime a stock pushrod gets bent so do the valve/'s?
No, that the conditions that bend pushrods can also bend valves. Also you can have slightly bent valves that only minimally affect valvejob sealing, so the engine can run fine. Slightly bent valves tend to distort the seat in the head, and can also fatigue much faster and fail sooner. This doesn't happen to most people, but it's a possibility.
Reply




All times are GMT -5. The time now is 03:55 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