Name That Sound...
Thread Starter
Racer
Joined: Feb 2001
Posts: 347
Likes: 119
From: Henderson NV
Name That Sound...
I have an odd sound that I can hear best from inside the car, windows up.
Best way I can describe it is it sounds like a small air compressor running. It's not the A/C compressor, I have it off. It's not the HAVC fan, doesn't change the I run the fan up and down. Doesn't seem to change with RPM. Worse when I have a cold engine. I can also hear it from the top of the left head with the hood up, slightly less on the right side, but it seems louder setting in the car.
Direct Injection injectors, maybe? Car runs great, no CEL. Ideas???
Best way I can describe it is it sounds like a small air compressor running. It's not the A/C compressor, I have it off. It's not the HAVC fan, doesn't change the I run the fan up and down. Doesn't seem to change with RPM. Worse when I have a cold engine. I can also hear it from the top of the left head with the hood up, slightly less on the right side, but it seems louder setting in the car.
Direct Injection injectors, maybe? Car runs great, no CEL. Ideas???
Melting Slicks
Joined: Jan 2017
Posts: 2,982
Likes: 1,040
From: Georgetown CA
2018 Corvette of Year Finalist
2017 C7 of Year Finalist
Dry sump car? If so, when cold then it does make somewhat of a gurgling sound with the oil system getting up to speed. More noticeable when cold...
Injectors are a constant sound....
Injectors are a constant sound....
Thread Starter
Racer
Joined: Feb 2001
Posts: 347
Likes: 119
From: Henderson NV
Constant as in always there, or constant in frequency, doesn't vary with RPM?
Burning Brakes
Joined: Jun 2014
Posts: 981
Likes: 157
Some cars run a self-test of the anti-lock brake system right after the engine is started. You may hear the pump running, and you may feel pulsations in the brake pedal during the test, but it normally only lasts for several seconds.
Thread Starter
Racer
Joined: Feb 2001
Posts: 347
Likes: 119
From: Henderson NV
Thanks for the input, but it's not the ABS pump. I'm familiar with that sound, and this is there pretty much all the time, just worse when it's cold.
Le Mans Master
Joined: Jun 2002
Posts: 6,433
Likes: 3,622
From: Commerce Texas
I know the sound you are speaking of. Have no idea what it is, other than, maybe something to do with the Infotainment/Navigation system.... hasn't affected the car's driving or performance in 55K miles....
Burning Brakes
Joined: Oct 2017
Posts: 883
Likes: 407
A video might help.
One thing I might add is that these new engines make lots of strange noises that are normal for them, but that you aren’t used to hearing.
If your temperarure is normal, oil pressure is normal, it drives normal, and you don’t have a check engine light, chances are, it’s normal.
One thing I might add is that these new engines make lots of strange noises that are normal for them, but that you aren’t used to hearing.
If your temperarure is normal, oil pressure is normal, it drives normal, and you don’t have a check engine light, chances are, it’s normal.
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Thread Starter
Racer
Joined: Feb 2001
Posts: 347
Likes: 119
From: Henderson NV
I tried to get a video this morning, but for whatever reason the sound was very quiet, and I couldn't capture it. I have a 300 mile drive I have to do tomorrow, so I'll see if I can get a good sound clip...
Last edited by DanZR1; Dec 5, 2017 at 03:46 PM.
Thread Starter
Racer
Joined: Feb 2001
Posts: 347
Likes: 119
From: Henderson NV
Safety Car
Joined: Jan 2005
Posts: 4,513
Likes: 1,463
From: Pittsburgh PA
2025 C8 Stingray of the Year Finalist - Unmodified
2024 C8 of the Year Finalist - Unmodified
A video might help.
One thing I might add is that these new engines make lots of strange noises that are normal for them, but that you aren’t used to hearing.
If your temperarure is normal, oil pressure is normal, it drives normal, and you don’t have a check engine light, chances are, it’s normal.
One thing I might add is that these new engines make lots of strange noises that are normal for them, but that you aren’t used to hearing.
If your temperarure is normal, oil pressure is normal, it drives normal, and you don’t have a check engine light, chances are, it’s normal.
Fortunately, it runs and performs beautifully and puts all of my previous Vettes to shame.
Le Mans Master
Joined: Sep 2012
Posts: 7,146
Likes: 1,940
From: Hagerstown MD
St. Jude Donor '15-'16,'18
I heard the same sound and left it with my dealer overnight so they could start it cold. They reported back that it was "operating normally". The injectors also seem to be louder when engine is cold.
Last edited by rmorin1249; Dec 5, 2017 at 07:46 PM.