LS1TECH - Camaro and Firebird Forum Discussion

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

Engine noise after cam install video inside

Thread Tools
 
Search this Thread
 
Old Jul 7, 2013 | 02:25 PM
Share
  #1  
Z28Dave's Avatar
Z28Dave
Thread Starter
TECH Apprentice
15 Year Member
Photogenic
Photoriffic
Shutterbug
iTrader: (10)
 
Joined: Mar 2010
Posts: 319
Likes: 0
From: El Paso, TX
Default Engine noise after cam install video inside
alright this noise developed after a week when swapped the heads, cam, intake, pushrods and lifters.

it sounds like a hollow knock to me so maybe a piston is hitting it?

http://www.youtube.com/watch?v=MDlFm...ature=youtu.be
Reply
0
Old Jul 7, 2013 | 02:46 PM
Share
  #2  
wildcamaro's Avatar
wildcamaro
TECH Addict
iTrader: (15)
 
Joined: Nov 2009
Posts: 2,501
Likes: 4
From: Western PA
Default
Man that fuel rail is dancing....What kind of lift on that cam? Heads milled? Did u measure for pushrods? Info brother please...lol
Reply
0
Old Jul 7, 2013 | 03:40 PM
Share
  #3  
Z28Dave's Avatar
Z28Dave
Thread Starter
TECH Apprentice
15 Year Member
Photogenic
Photoriffic
Shutterbug
iTrader: (10)
 
Joined: Mar 2010
Posts: 319
Likes: 0
From: El Paso, TX
Default
EnglandGreen mayhem II cam 23x/24x 63x/62x 113LSA
TSP 5.3L STG 2.5 heads 59cc
7.400 chromoly pushrods
LS7 lifters
LS2 trays
FAST 90/92
36lb injectors
Trunion upgrade
Reply
0
Old Jul 7, 2013 | 04:19 PM
Share
  #4  
mannyman84's Avatar
mannyman84
TECH Enthusiast
iTrader: (2)
 
Joined: May 2007
Posts: 638
Likes: 2
From: Hawthorne CA
Default
Sounds like. Push rod hitting or exhaust manifold gasket broken.
Reply
0
Old Jul 7, 2013 | 04:34 PM
Share
  #5  
Z28Dave's Avatar
Z28Dave
Thread Starter
TECH Apprentice
15 Year Member
Photogenic
Photoriffic
Shutterbug
iTrader: (10)
 
Joined: Mar 2010
Posts: 319
Likes: 0
From: El Paso, TX
Default
Why would only one be hitting? Kinda of a odd no? I hope its a broken gasket I don't want to open up the motor again
Reply
0
Old Jul 7, 2013 | 08:49 PM
Share
  #6  
mchicia1's Avatar
mchicia1
TECH Resident
iTrader: (5)
 
Joined: Apr 2009
Posts: 888
Likes: 9
Default
If you didn't flycut, that cam is most definitely hitting your pistons with the 59cc heads you have on there. You probably have barely any exhaust clearance. I bet you smacked a valve when you went WOT and that is the sound of bent valves.
Reply
0
Old Jul 7, 2013 | 11:14 PM
Share
  #7  
Z28Dave's Avatar
Z28Dave
Thread Starter
TECH Apprentice
15 Year Member
Photogenic
Photoriffic
Shutterbug
iTrader: (10)
 
Joined: Mar 2010
Posts: 319
Likes: 0
From: El Paso, TX
Default
well i never drove the car at that, just fired it up a few times and one day that started happening. it never spun past 3k although i can also be wrong about the chambers but if its a bent valve you say i'll take it to a shop since i'm tired of working on it and i cant fly cut it myself.

i was told there is a possiblity of it being a stuck lifter, i'm going to get a stethiscope tomorrow and pinpoint it
Last edited by Z28Dave; Jul 7, 2013 at 11:20 PM.
Reply
0

Trending Topics

Old Jul 8, 2013 | 01:03 AM
Share
  #8  
mannyman84's Avatar
mannyman84
TECH Enthusiast
iTrader: (2)
 
Joined: May 2007
Posts: 638
Likes: 2
From: Hawthorne CA
Default
Ive seen just one rocker get lose enough for the pushrod to get out. Also the video is kinda short to really tell. Take out the valve covers. Its cake and easiest thing before you take the heads apart again. Do you have a stethoscope?
Reply
0
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

 Verdad Gallardo
story-1

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-2

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

 Verdad Gallardo
story-3

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-4

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-5

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-6

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

 Verdad Gallardo
story-7

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

 Verdad Gallardo
story-8

10 Camaros You Should Never Buy

 
story-9

10 LS Engine Myths That Refuse to Die

 Verdad Gallardo
Old Jul 8, 2013 | 01:06 AM
Share
  #9  
mannyman84's Avatar
mannyman84
TECH Enthusiast
iTrader: (2)
 
Joined: May 2007
Posts: 638
Likes: 2
From: Hawthorne CA
Default
I doubt its a piston. If so all would be hitting
Reply
0
Old Jul 8, 2013 | 02:59 AM
Share
  #10  
PREDATOR-Z's Avatar
PREDATOR-Z
TECH Senior Member
 
Joined: Mar 2004
Posts: 14,620
Likes: 17
From: BFE
Default
That cam will not fit 59cc heads and TSP 2.5s have bigger valves than stock.
Reply
0
Old Jul 8, 2013 | 06:41 AM
Share
  #11  
FIVEPOINT7's Avatar
FIVEPOINT7
TECH Apprentice
iTrader: (2)
 
Joined: Sep 2011
Posts: 393
Likes: 1
From: North Carolina
Default
Take off the valve covers and see what you can find there, then find someone who has a borescope or rent one and look through the sparkplug holes and look at the pistons to check for damage
Reply
0
Old Jul 8, 2013 | 08:01 AM
Share
  #12  
mchicia1's Avatar
mchicia1
TECH Resident
iTrader: (5)
 
Joined: Apr 2009
Posts: 888
Likes: 9
Default
Guys, 23x/24x cam with milled heads and stock pistons. It is pretty obvious what the sound is. Heads gotta come off.
Reply
0
Old Jul 8, 2013 | 08:05 AM
Share
  #13  
Z28Dave's Avatar
Z28Dave
Thread Starter
TECH Apprentice
15 Year Member
Photogenic
Photoriffic
Shutterbug
iTrader: (10)
 
Joined: Mar 2010
Posts: 319
Likes: 0
From: El Paso, TX
Default
well i'll take the valve cover off later today, i'll have a buddy with a bore scope take a look at it i'll post up some pictures later on what i find.
Reply
0
Old Jul 8, 2013 | 09:31 AM
Share
  #14  
Roarin_8's Avatar
Roarin_8
12 Second Club
20 Year Member
Photogenic
Liked
Loved
iTrader: (6)
 
Joined: Aug 2002
Posts: 4,578
Likes: 49
From: Kissimmee, FL
Default
Post pics of the carnage. I wouldn't be surprised if you have a whole bunch of on the pistons.
Reply
0
Old Jul 8, 2013 | 11:22 AM
Share
  #15  
Marc 85Z28's Avatar
Marc 85Z28
TECH Fanatic
iTrader: (8)
 
Joined: Sep 2005
Posts: 1,395
Likes: 6
From: MD
Default
Not only is piston to valve contact very likely, but your pushrods are almost certainly too long. You probably need a 7.350" or 7.375"
Reply
0
Old Jul 8, 2013 | 11:28 AM
Share
  #16  
Roarin_8's Avatar
Roarin_8
12 Second Club
20 Year Member
Photogenic
Liked
Loved
iTrader: (6)
 
Joined: Aug 2002
Posts: 4,578
Likes: 49
From: Kissimmee, FL
Default
^^ Agree with the pushrods being too long as well. I'm running 7.350" pushrods and my duration is 238 for exhaust with the stock heads.
Reply
0
Back to Subforum
Generation III Internal Engine
View Next Unread
Need the pros help again, Valvetrain noise




Advanced Search

All times are GMT -5. The time now is 09:46 PM.

story-0
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-1
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-2
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-3
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-4
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-5
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-6
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
story-7
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-8
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE
story-9
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE