2024 5.3 Ticking

[WhiskeyFrog]

I recently purchased a 2024 Chevrolet Tahoe Z71 5.3L and I've noticed a constant ticking sound coming from the engine. Any idea what this could be?

Thanks in advance!

 

[Joseph Garcia]

Welcome to the Forum from NH.

Lots of knowledgeable folks here who freely share their knowledge, experiences, and perspectives. Knowledge is power.

I hope that you will become a participating member in the Forum's discussions.

Pics of the truck, please.

It could be a number of potential issues, none of them good. But since it is new, I recommend that you take it back to the dealer to get checked out under warranty.

 

[KMeloney]

My '09 Tahoe 5.3 developed a pretty good, intermittent tap. It wasn't all the time, and I noticed it most often in the morning (sometimes when it was warming up, but also sometimes after it had warmed up). I think it was a lifter tapping, and my local shop did a couple lubes and whatnot that pushed it off for a few weeks -- but it came back.

Good luck with it. Def get it to the dealership and see if they can rectify it.

 

[outkastist]

I just posted about this in case it helps - https://www.tahoeyukonforum.com/threads/popping-ticking-in-wheel-assembly.146966/

 

[KMeloney]

I recently purchased a 2024 Chevrolet Tahoe Z71 5.3L and I've noticed a constant ticking sound coming from the engine. Any idea what this could be?

Thanks in advance!

Is it while driving AND at idle? Does it increase in frequency when you rev the engine? If so, I'm betting it's a lifter tap.

 

[Silverado4x4]

I recently purchased a 2024 Chevrolet Tahoe Z71 5.3L and I've noticed a constant ticking sound coming from the engine. Any idea what this could be?

Thanks in advance!

Without hearing the tick in person or a video it's probably the high pressure fuel injectors they do make a ticking noise.

 

[Khantahoe89]

Any update on what the outcome was? I have same noise on cold start on my 2024 5.3.

 

[blanchard7684]

I've been investigating this as well. I've used a stethoscope and poke around the engine: Pan, head, exhaust manifold, valve cover. The noise doesn't seem to be from the engine. I'm going to check exhaust and the high pressure fuel pump next.

This is a noise that happens after a cold soak.

It isn't present immediately on start up. It happens after the idle speed settles down to cold engine range.

You hear an out of rhythm tapping sound; almost erratic. Then after about 5 minutes the sound disappears totally.

 

[blanchard7684]

Update: with a new stethoscope I checked several areas of the engine both top and bottom.

I checked transmission. And I checked accessory drive.

I can 100% guarantee it is not from engine or transmission.

I picked up the most strong signal on the catalytic converter.

I’m pretty sure it’s a strange warm up issue with catalytic converter.

 

[jfoj]

How fast is the ticking sound?

Is the noise a faster Tic, Tic, Tic with a constant timing or if the noise a Tic with pauses like Tic _____ Tic _____Tic _____Tic?

A slower Tic tends to be sometimes warm up expansion of something. Faster, rhythmic ticking usually is tied to something rotating or operating with the engine RPM.

I do know there have been complaints of the High Pressure Fuel Pump and high pressure fuel system components making ticking noise. This is why a lot of newer engines have insulated covers on top of the engines to try and mask some of the mechanical sounds from the engine or fuel system components.

Pull up to a wall on the drivers side with your window down and this usually reflects the noise back so you can hear it easier. A drive thru tends to be a good way to hear what may be going on with the car if no other noises are drowning out your vehicle.