Faint Ticking

[Mordicus7]

There is a faint ticking noise when im light on the gas around 40-60km/h really light ticking noise goes with gas and goes away after i push gas pedal more or it goes over 60

[Mordicus7]

So I took a good listen again it sounds like a rattling coming from passenger side foot area around firewall and comes in with rpm around 1500-2000 I cant hear it from outside but when im in the cab its a noise you definitley can notice

[cerbomark]

I m assuming you would know engine knocking if you heard it??? Did you have a PCM tune?

[Mordicus7]

yea its not engine knocking now that I have been reading up I think its rattling exhaust the sound really comes from the tunnel area on the passenger side like around the cupholder

[Slickgib]

i have the same problem. ive tried everything.. thinking it was a ticking valve ive changed my oil and put in additives, changed my spark plugs, wires and cap and rotor thinking it was a ignition problem.. also when i pulled my cap i saw there was alot of smoke and burn marks.. so i put a new one on. i dont know what it is.. the less a push on the gas the less likely i am to hear it. but its coming from the passanger said and it has only been getting louder.. maybe my timiing is off.

[scottmoyer]

Does it kind of sound like faint engine knocking, but not coming from the engine area? I hear a sound that I thought was a faint knocking coming from the passenger side area when cruising at highway speeds. It can't be heard outside, but... I taped my windshield molding down one morning thinking it was wind noise on the windshield, but that wasn't it. Any help is appreciated.

[Bogle45]

So I took a good listen again it sounds like a rattling coming from passenger side foot area around firewall and comes in with rpm around 1500-2000 I cant hear it from outside but when im in the cab its a noise you definitley can notice

 

Could it possibly be an exhaust leak?

[mudbug660]

I had a ticking on my driver's side and it was the a bad cat. I could hit the cat with the palm of my hand and it would rattle.

[3Gchevytruck]

i had a ticking on my right side very faint took it to exhaust shop and found a small hole in the pipe.

[1999 Tahoe 4x4]

I had similar issues for over two years. You can check my post previous "5.7 Ticking on Accelleration" I received some replys here on this forum suggesting an exhaust doughut leak. But I could not belive it because the sound sounded so absoulutely metallic valve noise. To make the long story short. It was the EXHAUST doughnut.

 

I took the truck to a great muffler shop. As I told my story to the muffler guy he already smiled at me. He told me right away it is the donut. He showed to me how Chevy made the connection at the donut in a way that you can't overtourque the donut (there is a stop). Well, you can't torque it right eighter. So all they did was to cut away thet stop, torqued the donut at that fixed the problem. The donut did not even had to be replaced.

[racerx55]

i have a faint ticking / tapping sound from teh passenger side under my 07, it never did it untill the first time i laid in the throttle then its been doin it ever since. sounds like an exhaust leak to me.

[1999 Tahoe 4x4]

Exhaust System Rumble/Rattle Noise (Replace Exhaust Pipe Seals and Modify Exhaust Pipe Ring Flanges) #01-06-05-006 - (Nov 2, 2001)

 

Exhaust System Rumble/Rattle Noise (Replace Exhaust Pipe Seals and Modify Exhaust Pipe Ring Flanges)

 

1996-1998 Chevrolet and GMC C/K Models with 4.3L Engine (VIN W -- RPO L35)

 

1996-1999 Chevrolet and GMC C/K Models (Old Style) with 5.0L or 5.7L Engine (VINs M, R -- RPOs L30, L31)

 

2000 Chevrolet and GMC C/K Models (Old Style) with 5.7L Engine (VIN R -- RPO L31)

 

1996-2002 Chevrolet and GMC G-Vans with 4.3L, 5.0L or 5.7L Engine (VINs W, M, R -- RPOs L35, L30 or L31)

 

1996-2002 Chevrolet and GMC S/T, M/L Models with 4.3L Engine (VIN W -- RPO L35)

 

1999-2000 Cadillac Escalade

 

1996-2002 Oldsmobile Bravada

Condition

 

Some customers may comment on a rumble/rattle-type noise that is audible in the vehicle passenger compartment when the engine is idling, the transmission is in Drive and the service brakes are applied. High ambient temperatures and A/C compressor cycling may further aggravate this condition.

Cause

 

This condition may be the result of inadequate clampload on the exhaust pipe seals at the exhaust pipe/manifold joint. The low seal clampload may be the result of the standoffs on either one or both of the exhaust pipe ring flanges contacting the exhaust manifold.

Correction

 

This condition can be corrected by replacing the existing exhaust pipe seals with new seals, P/N 15093974, and modifying the exhaust pipe ring flanges. The ring flange modification consists of reducing the height of all three of the standoffs on both of the exhaust pipe ring flanges by 2 mm (0.08 in). Follow the procedure below.

 

1. Following the Service Manual procedure, lower the exhaust system down enough to access the exhaust pipe ring flanges.

2. Remove and discard the existing exhaust pipe seals.

3. With the ring flanges slid down the exhaust pipe, mark each of the three standoffs on both the rings 2 mm (0.08 in) down from the surface that faces the exhaust manifold.

4. Grind the ring flange standoffs to the marks established in the previous step on both of the flanges.

5. Install new exhaust pipe seals, P/N 15093974.

6. Raise the exhaust pipe into position and hand start the ring flange to exhaust manifold fasteners.

[racerx55]

my 07 6.0L isnt on the list

it started at 400 miles, only does it when its hot. its not piston slap or a lifter. just sounds like a leaky donut. imagine that

i dont think chevy will ever get those right.

[1999 Tahoe 4x4]

my 07 6.0L isnt on the list

it started at 400 miles, only does it when its hot. its not piston slap or a lifter. just sounds like a leaky donut. imagine that

i dont think chevy will ever get those right.

The muffler guy that fixed mine told me that all Chevys are affected. In fact while mine was being done an H2 Hummer arrived and had requested his to be done as well.

 

I thought about it a lot why Chevy is building the ring flanges like that. The only explanation that I can give myself (just speculation) is that Chevy is doing that to ease the assembly process. They are building the ring flange in a way so it mathces the exhaust donut. I belive this way the exhaust can be put on and tightened during assembly faster because this way the nuts can be machine torqued 1,2,3 and ready. Unfortunately as a result with time the donut comes lose and can not be further toqued if you dont cut away the ring flanges.