Engine knock when cold.
Thread Starter
Heel & Toe
Joined: Jan 2009
Posts: 23
Likes: 1
Engine knock when cold.
Greetings, I have an 02 with 67000 miles, that has a slight knock when cold. Goes away when it's warmed up. I'm not too worried, because I've had quite a few 5.3s with a similar knock, and I have a 69 C10 with a 307, that knocks also, when cold. This is the first 350 that's had the knock. Just curious, if it may be common for the C5? Thanks for all replies, Phil.
Drifting
Joined: Jul 2015
Posts: 1,844
Likes: 375
From: San Jose, CA
"GM cars run poorly longer than most cars run at all."
If you're hearing piston slap while cold, this is apparently very common. I don't quite know what to listen for - I want to say mine doesn't really make that noise - but it makes other noises that are apparently also common. So many of us just go "meh it's fine" until either we swap the engine or some components for more performance, or something breaks (often due to somewhat questionable performance mods...), or until the car is sold or otherwise disposed of.
If you're hearing piston slap while cold, this is apparently very common. I don't quite know what to listen for - I want to say mine doesn't really make that noise - but it makes other noises that are apparently also common. So many of us just go "meh it's fine" until either we swap the engine or some components for more performance, or something breaks (often due to somewhat questionable performance mods...), or until the car is sold or otherwise disposed of.
Le Mans Master
Joined: Sep 2014
Posts: 5,278
Likes: 539
From: Kelowna BC
