Not sure if it’s necessarily a problem but I have 8xx miles on my 6.2 boss and ever since I got it I realized on cold starts for like a second maybe a second and a half I hear an knocking/marble/ticking sound. I can hear it from inside my house sometimes with the window open. It goes away immediately and dosent do it on a warm start. Is this piston slap? Injectors? Anyone else hear this?
Deadstockpomp
Cold start noise
Well, I would be documenting the issue with good audio/video. I'm gonna guess that it's piston slap, but you never know. Maybe take it back to dealer for evaluation.
This is the exact same noise I’m getting on an overnight or really cold start ! Braaaaaap. This is not my truck btw.
During start up after length cool down, you hear a braaap for about less than a second. This could be your knock sensor which is perfectly fine. you have a sensor that listens to the engine and adjust air and fuel mixture to proper level due to cold weather long sitting Etc. If is persist a lot and under warranty, have dealership maintenance section hear it and go from there. I don't think its your lifters due to quickly goes away.
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