Black sludge on top of block in 2.9L

[masterelyt]

After removing the intake I noticed that there was thick black build up, it wasn't gooey it was almost like dirt that was stuffed in all the indents on top of the block, I wish I could take a picture but I'm at work right now, I might upload a picture once I get home.

Has anyone had this issue before and is it something that I should be worried about?

I dug the stuff out as best I could but there is still a little residue as I was worried about knocking it loose into the coolant holes.

 

[jhammel85]

Sounds like carbon build up or oil. maybe both!

It sounds like someone didn't change the oil too much or it has a ton of blow by. I would clean it out completely and let it go. Just keep an eye on oil consumption.

 

[Psychopete]

I've seen exactly what your describing.. My only thoughts were that the pcv system wasn't working for a while, engine running too cold, poor maintenance, etc, sludge build up, then things get normalized (or the engine runs hot) and the sludge "cooks"

 

[masterelyt]

I appreciate the replies, I just cleaned out as much as I could and I'm about to put the thing back together, wish me luck