. Im on a bottle of vodka. Thats how i pass my time sitting home listening to wife bitch at me for drinking..
C5 corvette is knocking
Thread Starter
1st Gear
Joined: Oct 2024
Posts: 1
Likes: 0
C5 corvette is knocking
I have a 2002 c5 corvette with an auto trans and I can’t figure out why it’s knocking. The knocking tends to get faster when revving in the lower rpms and silent in the higher rpms. The whole car shakes but it’s got an upgraded cam so I’m not sure if it’s normal or not. The knocking also becomes barely noticeable from the outside when the car is warmed up. Any help would be great thanks!
Tech Contributor
Joined: Jan 2007
Posts: 19,398
Likes: 1,139
From: Dyer, IN
Le Mans Master
Joined: Jul 2010
Posts: 6,002
Likes: 722
Tech Contributor
Joined: Jan 2007
Posts: 19,398
Likes: 1,139
From: Dyer, IN
I have a 2002 c5 corvette with an auto trans and I can’t figure out why it’s knocking. The knocking tends to get faster when revving in the lower rpms and silent in the higher rpms. The whole car shakes but it’s got an upgraded cam so I’m not sure if it’s normal or not. The knocking also becomes barely noticeable from the outside when the car is warmed up. Any help would be great thanks!
Start simple
-pull the belt an run just to be sure nothing exterior rotating is causing the issue
-use a mechanics stethocope to isolate the noise
-use an IR thermometer on the exaust to see if you have a colder cylinder
Drifting
Joined: Sep 2022
Posts: 1,785
Likes: 2,033
From: In the woods
2024 C5of the Year Finalist - Unmodified
It isn't just piston slap? My 2K auto has a very distinct knock when cold started, can really hear it started in the garage. Goes completely away after a few minutes though it sounds as if yours does not go away.
Race Director
Joined: Mar 2010
Posts: 15,996
Likes: 821
If you're unable to pinpoint the knocking sounds, we may suggest bringing it to a Chevrolet dealership to have a deeper diagnosis performed to figure out the cause. Our team can help with that should you need it. Simply send us an email to socialmedia@gm.com to get started.
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