C6 Engine Knocking
Thread Starter
7th Gear
Joined: Sep 2022
Posts: 7
Likes: 2
C6 Engine Knocking
Hello everyone! I just bought my 1st Vette, 2012 LS3 manual. It has a nasty knocking coming from the engine. It won’t let me post the video here… can I send the video to anyone here and get your opinion on what it might be? I think I know but I’m far from an expert and would like someone else’s opinion
Le Mans Master
Joined: Jun 2008
Posts: 8,223
Likes: 411
From: Mt. Sinai NY
If you bought it can i assume you test drove it .....if so and it was ok then i would check the spark plug wires at both ends . If that isnt it the it might be a octane problem or a host of othe r things but thats a place to start. Having a obII meter would help. If not theres places like AutoZone that can give you a reading
Clif
Clif
Drifting
Joined: Aug 2022
Posts: 1,465
Likes: 418
From: Ruskin, FL
Hello everyone! I just bought my 1st Vette, 2012 LS3 manual. It has a nasty knocking coming from the engine. It won’t let me post the video here… can I send the video to anyone here and get your opinion on what it might be? I think I know but I’m far from an expert and would like someone else’s opinion
Thread Starter
7th Gear
Joined: Sep 2022
Posts: 7
Likes: 2
Drifting
Joined: Aug 2022
Posts: 1,465
Likes: 418
From: Ruskin, FL
Sounds like wrist pin or rod knocking. Start the engine and systematically disconnecting each spark plugs wire starting with cylinder #1. If the the knocking doesn't change reconnect the wire and move to cylinder #2. Do this until either the knocking stops or you've gone through all eight wires. If the knocking does stop that's your problem cylinder.
Thread Starter
7th Gear
Joined: Sep 2022
Posts: 7
Likes: 2
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
Thread Starter
7th Gear
Joined: Sep 2022
Posts: 7
Likes: 2
Sounds like wrist pin or rod knocking. Start the engine and systematically disconnecting each spark plugs wire starting with cylinder #1. If the the knocking doesn't change reconnect the wire and move to cylinder #2. Do this until either the knocking stops or you've gone through all eight wires. If the knocking does stop that's your problem cylinder.