Smell from engine

[River Rat]

I drive a 2005 Kenworth with a C15 475 cat motor it has about 250,000 km on it. It has two crank case vent pipes on it because of problems with breaking rocker arms. Now the fumes coming out the pipes and smells very rotton burnt oil. It stinks outside and inside the cab. Has anyone come across this problem. The River Rat

[Blacksheep]

I drive a 2005 Kenworth with a C15 475 cat motor it has about 250,000 km on it. It has two crank case vent pipes on it because of problems with breaking rocker arms. Now the fumes coming out the pipes and smells very rotton burnt oil. It stinks outside and inside the cab. Has anyone come across this problem. The River Rat

I got a 2005 W900 with same motor, I have 75,000 less miles than you but haven't had any wierd smells or problems with it.
Knock on wood.

[yoopr]

Blow by?

[mrpersons]

2nd the motion on the blow by. Bad rings??

[bob h]

is there a power or fuel economy concern?