2022 6.2 Exhaust leak & lifter noise...

[20L8TSierra24]

I have what I swear to be an exhaust leak from the header or where it connects to the cat but the dealer said it's a normal sound. I don't hear it at idle but under light acceleration or deceleration, it sounds like a 20 yr old Ford work van.

 

Anyone have a similar sound that's apparently normal for a 6.2?? 

 

I also have a loud lifter ticking/knocking noise. It happens every morning and if I let it sit long enough during the day.

 

Thanks in advance. Here's a video of the lifter noise.

https://youtu.be/t9UFIEB1TWI

Edited May 6, 2023 by 20Denali22

[Transient]

No exhaust leak here.  Just crossed 44k  miles on the odometer.  Fwiw, 20 years ago Ford made better vehicles than they do today.  They weren't the #1 recalled brand in the country back then.  Nonetheless, I'd hate to think GM stooped that low in quality. 

[GMCustomerService]

On 4/21/2023 at 11:03 PM, 20Denali22 said:

I have what I swear to be an exhaust leak from the header or where it connects to the cat but the dealer said it's a normal sound. I don't hear it at idle but under light acceleration or deceleration, it sounds like a 20 yr old Ford work van.

 

Anyone have a similar sound that's apparently normal for a 6.2?? 

 

Thanks in advance 

This is certainly not what we like to hear, 20Denali22.  Please know, customer satisfaction is extremely important to us. Our team would be more than happy to take a closer look into the concerns with your 2021 GMC Sierra Denali. To do so, please send an email to [email protected] with ATTN: 20Denali22/GM Trucks in the subject line.

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[newdude]

On 4/21/2023 at 11:03 PM, 20Denali22 said:

I have what I swear to be an exhaust leak from the header or where it connects to the cat but the dealer said it's a normal sound. I don't hear it at idle but under light acceleration or deceleration, it sounds like a 20 yr old Ford work van.

 

Anyone have a similar sound that's apparently normal for a 6.2?? 

 

Thanks in advance 

 

 

Have a read here.  V8 Engine Sounds – TechLink (gm-techlink.com)

 

6.2 and 6.6 are more noticeable than the 5.3 - V8 Engine Sounds – TechLink (gm-techlink.com)

[20L8TSierra24]

On 4/26/2023 at 3:43 PM, newdude said:

 

 

Have a read here.  V8 Engine Sounds – TechLink (gm-techlink.com)

 

6.2 and 6.6 are more noticeable than the 5.3 - V8 Engine Sounds – TechLink (gm-techlink.com)

 

https://youtu.be/t9UFIEB1TWI

 

What about this sound?? Every cold start, it's developed a LOUD ticking/knock noise also. It started around 7k miles. It has 8400 now and 483 Engine hours. It used to be only the first start of the day but now it's every cold start. Today's cold start

Edited May 6, 2023 by 20Denali22

[newdude]

1 hour ago, 20Denali22 said:

 

What about this sound?? Every cold start, it's developed a LOUD ticking/knock noise also. It started around 7k miles. It has 8400 now and 483 Engine hours. It used to be only the first start of the day but now it's every cold start. 

 

 

That sounds like a lifter not getting filled properly.  

 

Read this:  19-NA-218: Ticking Noise from the Engine

 

 

Some customers may comment that they hear a ticking noise coming from the engine when cold. This ticking noise will mainly occur during the first initial start in the morning.
Cause	This condition may be caused by a lifter not having a sufficient amount of oil during cold start operation (not pumped up).
Correction	To correct this condition, follow the Service Procedure below.

 

Allow the engine to sit overnight.

Note: You may need to allow 5-7 minutes to confirm.

1. Start the vehicle and listen for a tick noise.
   • If a tick noise is present, proceed to the next step.
   • If a tick noise is NOT present after running engine for at least 5 to 7 minutes, release the vehicle back to the customer.
2. Drive the vehicle through the DFM modes.
3. Check for any misfire DTCs and record:
   • If DTCs are found, refer to SI for diagnosis.
   • If no DTCs are found and noise still persists, operate the engine through cylinder Deactivation test to isolate the cylinder with the concern.
4. If the noise has been isolated, inspect for a bent pushrod and/or collapsed lifter.
   • If the pushrods are found to be in working condition, replace the lifters on the affected banks. Refer to Valve Lifter Replacement in SI.

[20L8TSierra24]

 I don't know what happened here... can't delete either 

Edited May 6, 2023 by 20Denali22

[silveradosid]

that does not sound good

[20L8TSierra24]

Drove by my dealer this morning and he said they're dropping like flies still. He said I have to drop it off next week at the end of a day and they'll give me a loaner. It will need to sit overnight like the bulletin states so they can get a morning cold start. He said it'll get a set of lifters by the way all my videos sound.. He joked and asked if I had a CEL light yet and when I said no, he said I will soon.

Edited April 29, 2023 by 20Denali22

[Transient]

What's your trucks build date?

[20L8TSierra24]

20 hours ago, Transient said:

What's your trucks build date?

I don't know. It's at the dealer now but I picked it up the day it hit the lot which was 9/26/22. It's  likely 1-2 months prior to if I were to guess.

[20L8TSierra24]

Engine is getting a full set of lifters next week. Service manager and I went out for a cold start this morning and he said it's definitely not normal 

[20L8TSierra24]

Picked up the truck today. Engine Sounds normal for the first 2 cold starts that I've done. No abnormal noises and it seems to be Idling a bit smoother but that may be just me. Dealer replaced all 16 lifters and their guides too.   

20230510_145932.heic

[dieselfan1]

How often did you change oil?

[20L8TSierra24]

47 minutes ago, dieselfan1 said:

How often did you change oil?

It was changed at 1500, 5k & 8300. I use the PF 63 and Mobil 1 oil. I switched to valvoline the 3rd change hoping it would improve the lifter tick but it didnt.