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

broken valves?/

Thread Tools
 
Search this Thread
 
Old 06-08-2005, 07:34 PM
  #1  
TECH Addict
Thread Starter
iTrader: (8)
 
ninobrn99's Avatar
 
Join Date: Apr 2003
Location: Honolulu HI
Posts: 2,513
Likes: 0
Received 0 Likes on 0 Posts
Default broken valves?/

What are some symptoms of a broken valve or bent pushrods or any problems with the heads other than the gaskets. Im trying to figure out why my car is running like ****! Its eating up gas like a **** and I have no power where I used to. I have no low end tq anymore. 3rd and 4th gears are weak, when they used to be very strong. Before it was tuned, it still ran good, I got it tuned a few days after and ran great. Now, 6 months later its running like dookie. A little help would be nice.
Nino
Old 06-08-2005, 10:20 PM
  #2  
TECH Addict
Thread Starter
iTrader: (8)
 
ninobrn99's Avatar
 
Join Date: Apr 2003
Location: Honolulu HI
Posts: 2,513
Likes: 0
Received 0 Likes on 0 Posts
Default

someone's had to have broken a valve and had symptoms...come on tech
Old 06-08-2005, 10:52 PM
  #3  
TECH Addict
iTrader: (2)
 
2K2WS6TA's Avatar
 
Join Date: Nov 2002
Location: Ark City KS
Posts: 2,938
Likes: 0
Received 1 Like on 1 Post
Default

Bent a valve in my IROC, and the symptoms described in your first post were what it was doing, plus the ticking/clicking noise. Have you over revved it, what makes you think it's in the valvetrain? Might be time to take off the valve covers and take a look
Not going to say definately valvetrain, but if everthing else has checked out, that'd be my next stop
Old 06-08-2005, 10:56 PM
  #4  
TECH Addict
Thread Starter
iTrader: (8)
 
ninobrn99's Avatar
 
Join Date: Apr 2003
Location: Honolulu HI
Posts: 2,513
Likes: 0
Received 0 Likes on 0 Posts
Default

ive checked the driver side and it kinda looked like one of the pushrods was slightly bent...very slight. I still need to check the passanger side. I dont think that Ive over reved it. I wont know till i finally pull the heads, but I need to get some gaskets and studs first.
Old 06-08-2005, 11:36 PM
  #5  
TECH Addict
iTrader: (2)
 
2K2WS6TA's Avatar
 
Join Date: Nov 2002
Location: Ark City KS
Posts: 2,938
Likes: 0
Received 1 Like on 1 Post
Default

If you still suspect a broken valve, a leakdown test could help determine what cylinder it is (if a piece of valve is missing or the stem is bent)
Old 06-09-2005, 07:49 AM
  #6  
TECH Addict
Thread Starter
iTrader: (8)
 
ninobrn99's Avatar
 
Join Date: Apr 2003
Location: Honolulu HI
Posts: 2,513
Likes: 0
Received 0 Likes on 0 Posts
Default

which is easier? doing that or pulling the heads?
Old 06-09-2005, 04:50 PM
  #7  
TECH Senior Member
iTrader: (14)
 
ArcticZ28's Avatar
 
Join Date: Jun 2004
Location: Alexandria, VA
Posts: 5,125
Likes: 0
Received 4 Likes on 4 Posts

Default

Compression test is easier, but chances are that you're gonna have to pull the heads anyways. So do a compression test first to see which cylinder it is (b/c you may not be able to tell with the naked eye) and then pull the heads.




All times are GMT -5. The time now is 12:29 PM.