Is it normal for a 104,000 mile LS1 to sound a little like a diesel as it gets older? Mine does. Not severe, but can hear it slightly. What can fix this?

 

Wide Open Throttle

 

Is the noise getting louder and louder?

 

No johnny, and acually, it tends to be when the engine is cold.

 

Oh yeah, and it seems to be slightly and faster under exceleration.

 

Sorry, "louder and faster" but only a little bit.

 

So when the engine reaches operating temp the noise disappears/quiets down? If so then it's perfectly normal, sounds like piston slap. LS1's have a very noisy valvetrain, so little ticks and knocks are pretty normal I wouldn't worry about it too much.

 

Could be some slight pre-ignition due to carbon buildup.

Get some Seafoam and do the 3 way treatment.

 

I have a 105K mi LS1 & it does the same thing. Sounds just a little like a diesel when cold. There's no degradation in performance & it goes away when the engine is warmed up.

 

Yes, I agree, it's just a little annoying. I figured with the new LT's, Y-pipe and C-Back, I shouldn't hear it anymore.

 

Last car I had that made that sound needed new main bearings,I hope that's not the case for you