Hi guys, I will do my best to descibe the situation. Engine is a 5.2 and as 274000Km on it and I only own the truck since december so I don't know the history of the truck. I get that ratteling sound when I drive at low RPM and I should be in a lower gear. If I try to accelerate in that situation I hear the ratteling coming from the engine. I was thinking if that could be the rockers adjustment or is it just a bad driving habit?

 

If it sounds like a can of marbles it might be the intake plenum gasket. You can diagnosis this easier by following this link: https://dodgeforum.com/forum/2nd-gen...um-thread.html

 

Yeah that would probably discribe the sound pretty good. I am checking your link right now, thanks.

 

Good luck. Let us know what you find. The plenum is not that hard to do. Just time consuming.

 

It makes a whole lot of sense now. Truck pretty much have all the symptoms describe in the post. I will check the Cat first but I am pretty sure it's the plenum now. I am not worried about fixing it and being time consuming since I am on leave until november lol.
Thanks buddy.

 

Have you thought to check the condition of the PCV valve, located on one of the valve covers? Different years have passenger side vs driver side. It will have a hose going to the intake manifold.

 

Yes I will check that to.

 

If the plenum is bad, so is the cat and o2 sensors. And just so you know, there is no rocker adjustment.

 

PCV looks fine, seems to move freely enough, I have P0138 as a code and that puzzle me a bit. I am going to have another look inside the plenum since I got myself a nice little mirror but it didn't look like the pictures in or the videos I have seen so far. Mostly silver with some spekle have oil, should it but perfectly clean?

 

That's the after cat O2 sensor. I think.