2009 Chevrolet Tahoe 4x4 5.3

[pale frost]

Car runs and drives great. I can’t seem to figure out what is causing this sound. Doesn’t come all the time, but sometimes. Any help is appreciated!

[hidden helm]

does it change with rpm? is it tied to something like the ac being on?

[pale frost]

I believe when the RPMs do go up, the ticking gets higher. I have to go see at it again.
When I cold start it and rpms jump from 0 to 2, the ticking gets loud and fast but as it settles, the ticking settles as well.
Only is heard sometimes tho

As for the AC being on, I barely drive this thing either AC on. And in this video, the AC was off

[deft sand]

AFM (lifter) finally died it seems, or the exhaust manifold cracked

How's your oil pressure at idle?

[pale frost]

Here it is while revving

[pale frost]

Car idles good, runs good, takes a good couple of pulls everyday

@deft sand after some research it’s 100% the lifter. Any tips or ideas on what to do next😭🔫

[deft sand]

Cam, lifters and tune, but if you don't have a lot replace the lifter and hope the cam is ok

[pale frost]

Any idea how much does it cost parts and labor included? Just the lifters and the whole thing?

[deft sand]

No clue but lifters are pretty easy to replace, ask a performance shop near you

[pale frost]

Thanks man, I believe the lifters are still in early stages of failure, what if go with just disabling it with that device or a tune? The car thankfully runs perfectly fine for now

[deft sand]

Too late for that

[pale frost]

Might have to part ways with it then, thanks for the help

[deft sand]

Think you can pull a cylinder head?

Like 24 bolts
Torque wrench
Ratchet
2 sockets
head gasket
Whichever lifter you fucked up replacement

[pale frost]

I have absolutely zero mechanical skills on cars, apart from some small easy stuff