C5Z Faint Chirping Sound
Thread Starter
Heel & Toe
Joined: Jan 2018
Posts: 19
Likes: 3
C5Z Faint Chirping Sound
Hey guys i recently noticed a real faint chirping sound coming from my engine and am stumped on what it could be. I already pulled both belts and the sound is still there. The car holds good oil pressure and i recently replaced the yellow valve springs out for blue ones . I pulled the valve covers again after replacing the springs and everything looks good, re-torqued the rocker arms they were all good as well.
Here is a link to the youtube video with the sound.
https://www.youtube.com/watch?v=4k12...ature=youtu.be
Here is a link to the youtube video with the sound.
https://www.youtube.com/watch?v=4k12...ature=youtu.be
Le Mans Master
Joined: Sep 2014
Posts: 5,278
Likes: 539
From: Kelowna BC
Sorry, it chirps with belts off? Check the HB. Any wobble at all?
Edit; make a stethoscope of some sort, ear one end and listen around carefully. I found a wrapping paper tube that works for me.
Edit; make a stethoscope of some sort, ear one end and listen around carefully. I found a wrapping paper tube that works for me.
Last edited by grantv; Feb 3, 2018 at 12:02 PM.
Racer
Joined: Nov 2014
Posts: 390
Likes: 58
From: Columbus, OH
MY ls1 has a faint chirp, it its worse when the revs fall from about 2000 to idle, if i am sitting and open the drivers door, I can hear it as the engine goes back to idle and you can hear it echo off walls and such...also with the belts off and not HB wobble...been doing it for a while now, can here it much better from under the car. Im just waiting for whatever it is to break at this point, been chasing it for along time, has not gotten any better or worse in two years. you figure it out, let me know, hopefully its the same thing.
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Drifting
Joined: May 2008
Posts: 1,692
Likes: 489
From: Denver, NC
Thread Starter
Heel & Toe
Joined: Jan 2018
Posts: 19
Likes: 3
Balancer noises tend to go away once the car has warmed up correct? This noise persists when the car is hot and cold. It is only noticeable when the hood is up. I closed the hood and listened under the car and could not hear it. It sounds like it is coming from the top of the motor but still hard to tell. I noticed one of the gaskets on the intake manifold seems to be pinched, i am wondering if that could be the culprit. I think at this point i need to pick up an automotive stethoscope.
Le Mans Master
Joined: Jul 2010
Posts: 5,954
Likes: 711
Moderator
Joined: Jun 2004
Posts: 22,591
Likes: 939
Are you sure its a chirp/squeak that you're hearing?
Moderator
Joined: Jun 2004
Posts: 22,591
Likes: 939
Balancer noises tend to go away once the car has warmed up correct? This noise persists when the car is hot and cold. It is only noticeable when the hood is up. I closed the hood and listened under the car and could not hear it. It sounds like it is coming from the top of the motor but still hard to tell. I noticed one of the gaskets on the intake manifold seems to be pinched, i am wondering if that could be the culprit. I think at this point i need to pick up an automotive stethoscope.