Originally Posted By: SteveSRT8
Several had carbon knock, that's a very similar sound that many cannot diagnose, super easy to fix.
Indeed, or possibly a combination of typical piston slap with carbon knock.
My 5.3 sees a lot of short trips, idling, and trips in town with speeds generally under 35 mph. When my wife drives it with the kids in the back, it barely goes over 2,000 RPM.
On the odd week that I drive it, I get a bit more aggressive with it and find the engine is quieter at idle and at start up.
It seems my 5.3 really likes to be worked. However, there's not much I can do to help a 5,000 pound SUV stretch its legs when it lives in a suburban environment.
Several had carbon knock, that's a very similar sound that many cannot diagnose, super easy to fix.
Indeed, or possibly a combination of typical piston slap with carbon knock.
My 5.3 sees a lot of short trips, idling, and trips in town with speeds generally under 35 mph. When my wife drives it with the kids in the back, it barely goes over 2,000 RPM.
On the odd week that I drive it, I get a bit more aggressive with it and find the engine is quieter at idle and at start up.
It seems my 5.3 really likes to be worked. However, there's not much I can do to help a 5,000 pound SUV stretch its legs when it lives in a suburban environment.