Is this oil residue anything to worry about?

[Rawze]

First of all, your boots look old and in need of replacing.

That is likely turbo slobber as it is called....

It happens if you ...

* idle a lot.

* have a re-man turbo (sometimes they just slobber a bit, especially at idle).

* Have a failing turbo (the inside of the intake will be full of oil too).

* have a custom tune and there is a vacuum on the intake. This is easily corrected and tested for.

* Have a custom tune and your turbo is simply old, and/or a re-man and you idle a good bit.

* Have excess crank case pressure. If it gets bad enough, it can blow out the face seal of the turbo.

* Have not changed the crank case filter often enough, and now it has damaged the face seal.

=== take your pick, you were not very specific in your engine history. Also, you have a Volvo truck. The turbo will run 100 degrees hotter on average in a Volvo than any other brand of truck. The intake and piping is more restrictive and there is not good air flow around the outside of the engine to keep it cooled off. They are terrible for that and that also makes the engine less fuel efficient by about 0.6 MPG. than other trucks in their class. this dictates the turbo will have a shorter lifespan than other brands of truck,.. say 400k miles instead of 600k miles as an example.

It is not a problem unless it is enough to make the intake wet too. If you do not idle your truck much, take off a CAC boot on the intake side and see if it is wet too. If it is, then you will want to consider replacing the turbo soon if it is old. Also make sure your crank case filter is drilled out, or that you have a fairly new one in it. Most of the guys on the forum just drill them out instead of replacing them.
http://rawze.com/forums/showthread.php?t...376#pid376