Engine Noise Please Help

[burnthefurniture]

My 5.3 in my 06 has recently started making a kind of ticking noise from primarily the drivers side. It can only be heard with the hood closed, and sounds like its from the bottom area of the engine. The noise accelerates with engine RPM, but gets drowned out by my exhaust at around 1500 or so RPM. I have a video of my idle, the noise is the ticking in the background. Any ideas?

 

 

[Draenor]

Do you have AFM?

[burnthefurniture]

Do you have AFM?

 

I assume you mean Active fuel management? I have a classic body style NBS 2006, so I am 98% that I don't have that.

[Zembonez]

Sounds like an exhaust leak or cracked manifold to me.

[catrains]

My 5.3 in my 06 has recently started making a kind of ticking noise from primarily the drivers side. It can only be heard with the hood closed, and sounds like its from the bottom area of the engine. The noise accelerates with engine RPM, but gets drowned out by my exhaust at around 1500 or so RPM. I have a video of my idle, the noise is the ticking in the background. Any ideas?

 

 

 

this may be the pcv ....have you replaced this...? this has happened to me

[burnthefurniture]

Sounds like an exhaust leak or cracked manifold to me.

 

Would that or a PCV valve cause gas mileage to go down significantly because around the time I began hearing the noise, it went down by like 2 mpg. Maybe its just the ethanol in the fuel. How would I check for an exhaust leak? Where is the PCV valve located?

[burnthefurniture]

My 5.3 in my 06 has recently started making a kind of ticking noise from primarily the drivers side. It can only be heard with the hood closed, and sounds like its from the bottom area of the engine. The noise accelerates with engine RPM, but gets drowned out by my exhaust at around 1500 or so RPM. I have a video of my idle, the noise is the ticking in the background. Any ideas?

 

 

 

this may be the pcv ....have you replaced this...? this has happened to me

 

 

haven't ever replaced the PCV where is that located?

[burnthefurniture]

Two more notes I neglected to mention. Firstly, it only makes the noise once warmed up. From a cold start, it idles fine but once it reaches operating temp, the "clicking" starts. I say clicking, but it is almost more of a swishing kind of noise that accompanies the click. Something exhaust related sounds possible. In addition, once the motor is warm, it does it constantly and consistently.

[zaac]

Ticks after it warms up doesn't seem like exhaust leak, why wouldn't it do it cold? Would a dirty or worn hydraulic lifter tick once the oil warms up? Can you tell what part of the engine it's coming from?

[burnthefurniture]

Ticks after it warms up doesn't seem like exhaust leak, why wouldn't it do it cold? Would a dirty or worn hydraulic lifter tick once the oil warms up? Can you tell what part of the engine it's coming from?

 

I cannot hear the noise if I look from the top over the motor due to the alternater/injectors/PS pump. However, if I have the hood closed, I can hear it from the side if I put my head down by the wheel well. I can also hear it from underneath on the driver side. It is much more pronounced on that side. The video was taken underneath the truck on the driver side.

[Zembonez]

Ticks after it warms up doesn't seem like exhaust leak, why wouldn't it do it cold? Would a dirty or worn hydraulic lifter tick once the oil warms up? Can you tell what part of the engine it's coming from?

I'll agree that exhaust leaks generally sound worse when cold. I didn't see where he mentioned whether it was hot or cold. (if so I missed that) A decent crack in a manifold or a blown gasket can make noise all the time. In the video it just doesn't sound mechanical... but it could just be the way the mike is picking it up too.

 

EDIT: AHA! I see his added post now. That would be somewhat odd for an exhaust leak.

[dlstewart01]

A 2006 has a fixed orfice PVC and is non replacable.

 

Have a good one,

 

Don

[zaac]

Wish I could help more. Hard to diagnose noises over the internet. Might be worth buying a stethoscope. When you figure it out I'd be interested in hearing what it was.

[dlstewart01]

Ticks after it warms up doesn't seem like exhaust leak, why wouldn't it do it cold? Would a dirty or worn hydraulic lifter tick once the oil warms up? Can you tell what part of the engine it's coming from?

 

 

When the exhaust manifold warms up it expands thus exposing the leak if thats what it is.

 

Don

[burnthefurniture]

Wish I could help more. Hard to diagnose noises over the internet. Might be worth buying a stethoscope. When you figure it out I'd be interested in hearing what it was.

 

I appreciate the help. Its very annoying and I want to get rid of it, but I'm as unsure about what it is, other than the general area that it is coming from. I do agree with dembones though, it sounds much less mechanical and more like in the video, it is a pretty accurate representation of it on the video.

 

Edit: if anyone has any ideas/solutions please let me know!!