I have a 2008 , 2500 6.7L. I have a low end knock. It is fine when it is cold but when it warms up it sounds like an old tractor . If anyone has had this problem or knows what the problem is any help would be great. I haven't had any codes and just changed the fuel filter.

By the way this is my first thread , nice to meet you all , love the site hope someone can help.

Thanks

 

My first thought is the injectors are ticking. and your thinking its lower engine. Do you use power service at all? what kind of fuel are you running? BIO? LSD? ULSD? b5-20? off road dyed fuel?


without hearing it for myself anyone's guess what is wrong. I think this is one of them cases where you are going to have to take it to the dealer or a cummins dealer. if you take it to a Cummins dealer check the website to make sure they are a 6.7 dealer not all are.