engine noise at idle speed

Wesens · 05-28-2016, 10:02 AM

Hi all. I have a 2015 c7 z51. At idle speed I hear a vibration/rattling type noise coming from the engine compartment. When I increase the RPMs even slightly the noise goes away. Any ideas? I'm not a mechanic and have learned over the years to not poke around under the hood. Wondering if this is normal or if others have noticed the same type of noise. First Vette, so don't really know what's normal in terms of sounds coming from the engine. Thanks!

h422694 · 05-28-2016, 01:24 PM

The engine uses direct injection and has a new fuel pump. It produces a ticking noise. There's been a lot of discussion about it on these forums over the past 2 yrs. Might be that.

rdanzel · 06-07-2019, 03:38 AM

The clicking noise is the high pressure fuel pump and that is normal.

Drsagacity · 07-19-2019, 06:57 PM

I think it’s the lifters or something. I have the same. Previous owner took it to the shop and I saw the mechanic feedback. I don’t recall exactly, but it did say something about DI and being normal.

Since I am about to have the engine pulled apart, I will have my mechanic check it too before we get too far into it.

henryford · 01-08-2022, 02:02 PM

In fact, there can be many reasons, it is quite difficult to determine the problem by ear, a thorough diagnosis is needed. The noise of the car engine can be caused by various reasons - an extended alternator belt, a malfunction of the cooling system pump, problems in the operation of the ignition system and/or the fuel supply system, elements. I had a similar noise on my Silverado, but after 5.3 vortec performance upgrades, all the problems disappeared, I found https://nashvilleperformance.com/sil...ance-upgrades/ a huge amount of information on how to improve my engine better.

Braham · 06-26-2023, 11:03 PM

Quote:

Originally Posted by Wesens

Hi all. I have a 2015 c7 z51. At idle speed I hear a vibration/rattling type noise coming from the engine compartment. When I increase the RPMs even slightly the noise goes away. Any ideas? I'm not a mechanic and have learned over the years to not poke around under the hood. Wondering if this is normal or if others have noticed the same type of noise. First Vette, so don't really know what's normal in terms of sounds coming from the engine. color tunnel Thanks!

I also hear the clicking noise. I quite worry about it. So, I want to find the cause. I think my car has some problems, right?

05-28-2016, 10:02 AM	#1
Wesens Drives: '15 Z51 3LT Blk-Adrenaline Red Join Date: May 2016 Location: North Carolina Posts: 1	engine noise at idle speed Hi all. I have a 2015 c7 z51. At idle speed I hear a vibration/rattling type noise coming from the engine compartment. When I increase the RPMs even slightly the noise goes away. Any ideas? I'm not a mechanic and have learned over the years to not poke around under the hood. Wondering if this is normal or if others have noticed the same type of noise. First Vette, so don't really know what's normal in terms of sounds coming from the engine. Thanks!

07-19-2019, 06:57 PM	#4
Drsagacity Drives: 2017 Camaro 2SS Nightfall Gray vert Join Date: Jan 2018 Location: Swansea, IL Posts: 1,219	I think it’s the lifters or something. I have the same. Previous owner took it to the shop and I saw the mechanic feedback. I don’t recall exactly, but it did say something about DI and being normal. Since I am about to have the engine pulled apart, I will have my mechanic check it too before we get too far into it. __________________ 2017 Camaro 2SS vert - Nightfall Gray Magnuson Heartbeat SC - Tuned by JRE Racing 776whp/745wtq (12psi) 2018 Corvette Z06 vert- Black To be tuned by JRE Racing TBD performance

01-08-2022, 02:02 PM	#5
henryford Drives: Corvette Zr1 Join Date: Feb 2021 Location: Texas Posts: 5	In fact, there can be many reasons, it is quite difficult to determine the problem by ear, a thorough diagnosis is needed. The noise of the car engine can be caused by various reasons - an extended alternator belt, a malfunction of the cooling system pump, problems in the operation of the ignition system and/or the fuel supply system, elements. I had a similar noise on my Silverado, but after 5.3 vortec performance upgrades, all the problems disappeared, I found https://nashvilleperformance.com/sil...ance-upgrades/ a huge amount of information on how to improve my engine better. Last edited by henryford; 01-10-2022 at 05:46 PM.

05-28-2016, 01:24 PM	#2
h422694 Drives: '16 Z06 7 Spd, 2024 High Country HD Join Date: May 2015 Location: Kansas City area Posts: 432	The engine uses direct injection and has a new fuel pump. It produces a ticking noise. There's been a lot of discussion about it on these forums over the past 2 yrs. Might be that.

06-07-2019, 03:38 AM	#3
rdanzel Drives: 2010 Join Date: Mar 2015 Location: Ga Posts: 249	The clicking noise is the high pressure fuel pump and that is normal.