LS1Z28_98

After a recent header and exhaust install, I have noticed a ticking in the drivers side of the car. Under the hood, all you can hear is the fuel injectors. If you get beside the front left tire, you can hear it if you put your ear near the tire, and of course under where the left side header is. Engine and exhaust checked for leaks and none have been found. Seems to be more prevelent when its cold. Could this be a bad lifter or a bad valve?

Thanks for any input

thunderstruck

iTrader: (15)

most likely the check valves on the egr. common after a header swap

Tirefire

iTrader: (1)

Is this an easy fix because I aloso have this problem..

thunderstruck

iTrader: (15)

if it is the air check valves, this might help you.
http://riptide63.homestead.com/restrictor.html

01formula6

iTrader: (7)

I have the EXACT same problem after my header install. I remove the air system, so its not that. Mine is a 2001 so its not egr.

thunderstruck

iTrader: (15)

does the sound go away at all?

98Z28MASS

iTrader: (6)

make sure the plugs are in all the way. I had the same problem, sounded like it was coming from the wheel well and one of the plugs was loose, try that, thats what fixed my problem.

MannyZ28

iTrader: (1)

Some light ticking is to be expected, I had the same thing. Your headers are not anywhere is thick is the stock exhaust manifold was, therefore you get some more valvetrain noise by putting them on.

The AIR "ticking" is usually only noticeable when driving, not at idle or just reving it, and yes, that will be fixed.

When I put my cam and springs in, the "ticking" through the headers got even more exaggerated due to my use of Comp 918 springs.

A car just won't sound stock once you start ******* with it

Manny

RollinSScamaro

iTrader: (25)

remove the AIR system and EGR.. solves that problem..

Check for exhaust leaks!

and LS1's can be boisy sometimes anyways.. wait till you hear one with upgraded valvetrain and a bigger cam.. sounds like a sowing machine sortta haha..

MannyZ28

iTrader: (1)

Yes it does!

RollinSScamaro

iTrader: (25)

i meant LS1's can be noisy... not boisy lol.. as long as its not slapping or ticking real hard! you are fine

01formula6

iTrader: (7)

Anyone else? The ticking is definitely noticeably loud, you dont' have to put your head under the car to hear it. It is most noticeable at idle and the speed of the ticking quickens as the rpm's go up. At about 2500 rpm's you can no longer hear the ticking, most likely due to the loudness of the car.

MannyZ28

iTrader: (1)

Yeah, that's pretty much how mine was when I just had the Headers on.

98Z28MASS

iTrader: (6)

Again if you havent already checked, check the plugs again. I went through the same issues your talking about and i replaced check valves, checked for exhaust leaks, etc as I was positive I had the plugs in good. Turns out that even though I had they in right before they had backed themselves out a little bit and that caused all of the ticking. After tightening them again (dont need to tighten them too much as you dont want to thread them in there) the noise was gone. Good luck though and dont worry, if it stays and everything else is fine (no ses lightens and runs/idles fine) then I wouldnt worry about it too much.

01formula6

iTrader: (7)

Alright, since I'm checking the plugs it seems like a good time for some MSD wires. Hopefully one of the plugs backed out a little and this fixes it.

LS1Z28_98

All the plugs and wires were fine. I checked the exhaust and even tightened the flanges at the header and Y-pipe connect. the noise does subside as the engine comes up to operating temp. When I drive the only time i hear it is when another car pulls up next to me and i hear the sound bounce.

Otherwise she runs like a scalded dog.

Black_Bird

iTrader: (6)

I have this same exact problem..just noticed it today and was searchin for some info on it...its just a tick tick tick tick sound and if you give it any throttle it speeds up....

98Z28MASS

iTrader: (6)

I know what you guys mean, as mine made that noise, you wouldnt hear it when driving unless you were next to another car or a jersey barrier or something that the sound could reflect off. The plugs tightened solved mine. However, could be valvetrain noise, exhaust leak, etc...Hard to tell with LT's. Mine is quiet now but I have other friends with longtubes that have much more noise than me. Usually its either egr, air check valves, loose plugs, or an exhaust leak that causes that ticking noise. If those all check out and the car runs fine i wouldnt worry about it. As a couple of the guys hav said wait to you get a good sized cam in there, you will def hear more valvetrain noise. Good luck though and again if it isnt effecting performance and no ses lighst then I wouldnt worry.