2007 5.3 Engine Noise (knocking?)

[csvencer]

2007 Suburban, 165,xxx, 5.3L 4WD.

 

I started having a puffing noise or sputting noise (sorry, hard to type a name) coming from the block on the passenger side, most prominent fright behind one of the idler pulleys (below the air intake).  Here's a clip of the noise...

 

https://photos.app.goo.gl/i9wMprrFefToLDB97

 

The closest thing I can describe it as is a small steam engine puttering along, not some much a knocking noise.  It sounds the loudest around the 8 second mark.  Can anyone throw some ideas at me?  No engine codes, lights, or any other signs.  She burns a quart every oil change and has for a while.  I'm running high mileage oil, changed every 3-4K.

 

Appreciate any help

 

-Svence

Edited October 10, 2018 by csvencer

[txab]

Did you ever consider it is the idler pulley? Sounds like bearing chatter from where I sit. Remove the belt and run it

[Colossus]

I hope it is just idler chadder..

[csvencer]

I have replaced a pulley or maybe it was the tensioner, it’s been a while. Any issues with removing the belt and firing her up?  I assume it’s fine for a short bit correct?

 

 Thanks. 

 

-Svence

[txab]

correct

[csvencer]

Just removed the belt and I didn't hear the noise. Swapping the tensioner out this weekend.  Thanks for the help.  Last one I had go bad sounded more like a whining ,this was a new one for me to hear under the hood.

 

Appreciate the help.

 

-Svence

[txab]

[greatmizzou]

Hey as far as your burning oil, I noticed a lot less burning off when i switched to full synthetic.   Castro’s GTX regular oil used to burn up on me so fast till I went up to full sun.  What are you using?

[Black02Silverado]

Does your engine have AFM?  That can be the cause of oil consumption.  How many miles on your truck?  I went through a qt of oil on my truck every 7k miles.  Once I replace the intake gasket for what I thought was my oil leak I had my oil consumption went away.  My oil leak turned out to be my rear main seal.  I have 184k on my 2002. 

[csvencer]

I deleted AFM around 50-60k (don’t remember exactly) with a BB tune. I know there were thoughts that the cylinder shutdown was causing the oil burning, but not sure if I didn’t do it soon enough or if that was just hearsay. Doesn’t bother me, just have to keep an eye on it. 

 

And I’m running valvoline max, pretty sure it’s a blend. 

 

-Svence