Page 3 of 5 FirstFirst 12345 LastLast
Results 41 to 60 of 83
  1. #41
    Member GNICTRY's Avatar
    Join Date
    Jun 2007
    Location
    Virginia
    Posts
    558

    Silver
    2000 Trans Am WS6 Ram Air

    no when i got it it had the wrong throttle body so it wouldnt shift past 4500rpm...i havent hit the rev limiter but once since i have had it but the people b4 me werent the best at taking care of it

  2. #42
    Junior Member
    Join Date
    Feb 2007
    Location
    San Jose, CA
    Posts
    24

    Black
    2000 Trans Am WS6

    Hey, thanks for posting this, mine has what sounds like exactly the same noise with no codes thrown. Not feeling so good after reading the reply by 98ws6zo6.

    Anyway, I guess I'll try pulling the valve covers and looking at the rods as recommended.

    Incidentally, I took it to a local LS1 shop and they suggested pulling the belts to make sure it wasn't an accessory. I did, and it wasn't. I think it sounded a bit louder down by the crankshaft than up top, but it's hard to say.

    The good news is that this extra knocking drowns out the squeak of the idler pulley.

    Matt

  3. #43
    Member GNICTRY's Avatar
    Join Date
    Jun 2007
    Location
    Virginia
    Posts
    558

    Silver
    2000 Trans Am WS6 Ram Air

    i no what u mean i have been able to take the valve covers off to look...i just got the trans in to make it drivable...it not as bad once oil get going...i pretty sure its the lifter/push rods...we'll see

  4. #44
    Junior Member
    Join Date
    Feb 2007
    Location
    San Jose, CA
    Posts
    24

    Black
    2000 Trans Am WS6

    Are you guys serious about this taking 30 minutes? Granted I'm not a top mechanic, but I've been working for like 1.5 hours just to get the driver side coil pack assembly off, and the passenger side seems like it's going to be worse. Something I'm missing? The bolt closest to the firewall is covered by some clip attached to something else I have to figure out how to remove in order to get the bolt off.

  5. #45
    TunedbyFrost.com Tuner Frost's Avatar
    Join Date
    Jul 2007
    Location
    Richmond VA
    Posts
    2,415

    LS1.com Sponsor
    GM Tuner

    Quote Originally Posted by matt100psi View Post
    Are you guys serious about this taking 30 minutes? Granted I'm not a top mechanic, but I've been working for like 1.5 hours just to get the driver side coil pack assembly off, and the passenger side seems like it's going to be worse. Something I'm missing? The bolt closest to the firewall is covered by some clip attached to something else I have to figure out how to remove in order to get the bolt off.
    an hour and a half to take off a coil pack??

  6. #46
    Junior Member
    Join Date
    Feb 2007
    Location
    San Jose, CA
    Posts
    24

    Black
    2000 Trans Am WS6

    Ahh...I see. I stupidly thought the assembly (the metal piece all the packs attach to) had to come off, and the bolt in the very back is a real jerk. Yes, it's much easier just taking off the individual packs, and I see the 8mm bolts are accessible beneath them.

    How bent would a bent rod be to cause knocking? Is it something I'd clearly see?

    Thanks,
    Matt

  7. #47
    I lika da Chevy's LETHALxLS1's Avatar
    Join Date
    Oct 2006
    Location
    USA
    Posts
    5,318

    BLACK
    Z/28 LS1

    Roll it on a flat surface and it should be pretty obvious if its bent. You should keep track of which goes where and put each back where it came from.

  8. #48
    Junior Member
    Join Date
    Nov 2005
    Location
    US
    Posts
    60
    01 Formula

    I have the same noise problem.I will admit that I hit the limiter several times(sighs).I took of my valve covers and rockers,push rods.Rolled the push rods on a glass surface and all came rolling flat.This was like 3 or 4 years ago.Ive been driving it ever since.I wouldn't recommend it,but the noise kind of goes away after the motor warms up.

    I think its either a vent valve or a bad lifter.

  9. #49
    Junior Member
    Join Date
    Feb 2007
    Location
    San Jose, CA
    Posts
    24

    Black
    2000 Trans Am WS6

    Thanks for the feedback and advice, guys. I looked at the rods/rockers for the odd cylinders and they all looked fine. Not really wanting to go through the process on the even cylinders if I didn't have to, I got a stethoscope to hear what I could hear. It was the driver's side (the side I checked) that was worse, and worse near the valves than near the rockers. So lifters or valves seem like reasonable hypotheses. What's a "vent valve"?

    If the sound went away after the engine was warm, I'd think it was a matter of some component heating up to its spec'd size. But for me, I hear the sound at idle regardless of engine temperature. I think I just don't hear it much at higher RPMs because of other engine noise.

    Matt

  10. #50
    I lika da Chevy's LETHALxLS1's Avatar
    Join Date
    Oct 2006
    Location
    USA
    Posts
    5,318

    BLACK
    Z/28 LS1

    Quote Originally Posted by matt100psi View Post
    Thanks for the feedback and advice, guys. I looked at the rods/rockers for the odd cylinders and they all looked fine. Not really wanting to go through the process on the even cylinders if I didn't have to, I got a stethoscope to hear what I could hear. It was the driver's side (the side I checked) that was worse, and worse near the valves than near the rockers. So lifters or valves seem like reasonable hypotheses. What's a "vent valve"?

    If the sound went away after the engine was warm, I'd think it was a matter of some component heating up to its spec'd size. But for me, I hear the sound at idle regardless of engine temperature. I think I just don't hear it much at higher RPMs because of other engine noise.

    Matt
    Why didnt you check them all?

  11. #51
    Junior Member
    Join Date
    Feb 2007
    Location
    San Jose, CA
    Posts
    24

    Black
    2000 Trans Am WS6

    Because despite claims that all 8 can be done in 15-30 minutes, it took me significantly longer for just the 4 I did, and the stethoscope indicated that the problem was on the driver's side.

    Matt

  12. #52
    I lika da Chevy's LETHALxLS1's Avatar
    Join Date
    Oct 2006
    Location
    USA
    Posts
    5,318

    BLACK
    Z/28 LS1

    I would check them all-I wouldnt care if it took 2 days.

  13. #53
    I lika da Chevy's LETHALxLS1's Avatar
    Join Date
    Oct 2006
    Location
    USA
    Posts
    5,318

    BLACK
    Z/28 LS1

    Quote Originally Posted by FORMULA7 View Post
    I have the same noise problem.I will admit that I hit the limiter several times(sighs).I took of my valve covers and rockers,push rods.Rolled the push rods on a glass surface and all came rolling flat.This was like 3 or 4 years ago.Ive been driving it ever since.I wouldn't recommend it,but the noise kind of goes away after the motor warms up.

    I think its either a vent valve or a bad lifter.
    If the noise you hear goes away when the engine warms up then I would say its piston slap. My car has it too.

  14. #54
    Junior Member
    Join Date
    Feb 2007
    Location
    San Jose, CA
    Posts
    24

    Black
    2000 Trans Am WS6

    Quote Originally Posted by LETHALxLS1 View Post
    I would check them all-I wouldnt care if it took 2 days.
    I see. This is the first time I've used a stethoscope for diagnosis. In your experience, are they not generally precise enough to distinguish a noise on one side of the engine vs. the other side?

    Thanks,
    Matt

  15. #55
    I lika da Chevy's LETHALxLS1's Avatar
    Join Date
    Oct 2006
    Location
    USA
    Posts
    5,318

    BLACK
    Z/28 LS1

    Quote Originally Posted by matt100psi View Post
    I see. This is the first time I've used a stethoscope for diagnosis. In your experience, are they not generally precise enough to distinguish a noise on one side of the engine vs. the other side?

    Thanks,
    Matt

    Dude-check the other side. If you dont find anything take the car to someone who knows F bodies so they can listen to it. If you can hear the noise after the engine gets hot then something is wrong.

  16. #56
    Junior Member 98ws6zo6's Avatar
    Join Date
    Dec 2007
    Location
    san antonio tx
    Posts
    10

    black
    98 ws6 trans am

    hey im not saying im just sayin, i'll put my bottom dollar you pull those heads and at least one or two lifters aren't gonna slide out of the bore like they should.........

  17. #57
    Member c5z28's Avatar
    Join Date
    Apr 2008
    Location
    Bay Area
    Posts
    8,114

    On your ass flashing
    my highbeams

    Quote Originally Posted by 98ws6zo6 View Post
    hey im not saying im just sayin, i'll put my bottom dollar you pull those heads and at least one or two lifters aren't gonna slide out of the bore like they should.........
    Have you had this problem because I have the same damn thing.

  18. #58
    I lika da Chevy's LETHALxLS1's Avatar
    Join Date
    Oct 2006
    Location
    USA
    Posts
    5,318

    BLACK
    Z/28 LS1

    reminds me of that song tick tick BOOM!

  19. #59
    Member knappbunch's Avatar
    Join Date
    Apr 2008
    Location
    virginia beach
    Posts
    732

    red
    2002 ss camaro

    mine makes that sound at cold start but once it warms up it goes away

    piston slap? is what everyone seems to say. for mine anyway.

  20. #60
    I lika da Chevy's LETHALxLS1's Avatar
    Join Date
    Oct 2006
    Location
    USA
    Posts
    5,318

    BLACK
    Z/28 LS1

    pimp slap is way worse than piston slap IMO.

Page 3 of 5 FirstFirst 12345 LastLast

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Help: Knocking noise
    By 2000dreambird in forum Internal Engine
    Replies: 8
    Last Post: 11-01-2010, 03:54 PM
  2. KNOCKING noise
    By ls1hoon in forum Internal Engine
    Replies: 9
    Last Post: 03-12-2007, 09:50 PM
  3. knocking noise?
    By wicked illusions in forum Internal Engine
    Replies: 8
    Last Post: 06-16-2006, 10:46 AM
  4. knocking noise?
    By wicked illusions in forum General Help
    Replies: 7
    Last Post: 06-08-2006, 11:21 AM
  5. 98 knocking noise
    By daas5 in forum Almost Anything Goes
    Replies: 11
    Last Post: 05-01-2006, 06:10 AM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •