Adjusting rockers?

[Danno]

The engine's got just over 200,000 miles on her, and she's getting a little clattery before warming up to operating temp. Do we need to adjust (retorque?) the rockers on our diesels?

I've got to replace the valve cover gaskets sometime in the near future anyways, so I guess that would be a good time to do it.

 

[Oblin Goblin]

The 6.2's have hydraulic lifters that don't need adjusting. My truck used to clatter quite a bit when the engine was cold. Not a normal clatter, it sounded like the lifters on every cylinder were sticking. It still does it sometimes at high altitude when the engine is cold. I think its combustion knock but I'm not real sure. I don't know if its normal but I haven't had any problems related to it.

 

[René]

After a cold starting you can hear many noises, but the lifters should not be present.

 

[Danno]

I know the lifters are hydraulic, but can the rockers become loose over time? That's all I'm wondering.

Man, I need a garage. I hate working in an apartment parking lot.