Hey guys I am new to diesel bombers. I have an 05 duramax with a really annoying rattle that you can here from inside the truck. The noise sounds like the valvetrain but it cant be because I just got done adjusting the valve lash. I had it up to the dealer and had an injector balance test done and found a bad injector, replaced it and everything is good with the injectors. So I am not sure what it is. At an idle the only rattle is the injectors, It makes the most noise when just reving the truck up and not when under load, I run my winter front and get the engine good and warm and it gets quiter, when I power brake the truck and get the egts up the noise goes away until the truck cools back down. when driving there is no rattle under load except when the truck shifts but it is there when just cruising. I have a super chip, 4 in straight pipe, mbrp down pipe, afe intake, fass lift pump, and flex a lite fans. Any ideas

 

is it more like a tapping noise or like a clatter type noise?

 

more of a clatter. if you put a long handle screw driver on an injector and listen to it thats what it souds like

 

did you adjust the valves in an attempt to fix this problem?

perhaps there was a misadjustment, could be "injector rattle" or could be too mcuh pressure - leading to a possible bad fuel pressure regulator.

 

It might sound kind of stupid but the noise was the downpipe leaking or rattling in the turbo.