GEAR 3H4843 - Caterpillar

Introduction
The problem that is identified below does not have a known permanent solution. Until a permanent solution is known, use the solution that is identified below.Problem
Some of the C13 powered machines are having excessive oil soot residue found in the exhaust manifold and small metal debris are found. The engine can also have high crank case pressure. The valve stem seals may not have been installed correctly or could be damaged.Resolution
If the engine has excess oil soot residue found in the exhaust manifold, ensure that the engine is not idling for long periods of time. If the slobber continues under normal load and full open thermostats, then remove valve cover and check the valve stem seal (A). If the seal and small spring are damaged or missing, the parts will need to be replaced.
Illustration 1 g03348892
(A) 163-2478 Valve Stem Seal