Maxxforce 13 Crankcase Breather Problems Apr 2026

The MaxxForce 13 engine, manufactured by Navistar, is well-known for its complex emissions systems, and the is a frequent source of trouble. When this system fails, it often leads to excessive oil being expelled through the road draft (blow-by) tube. Common Crankcase Breather Problems Failing Centrifugal Separator (Squirrel Cage)

The "jet plate" is a brass orifice that sprays oil onto the centrifuge to spin it. maxxforce 13 crankcase breather problems

If the bearings fail or the assembly becomes clogged with sludge, the spinner slows down, losing its ability to separate oil from air. This causes the system to flood, forcing raw oil out of the breather tube—sometimes at a rate of several gallons per day. Jet Plate Erosion The MaxxForce 13 engine, manufactured by Navistar, is