SEAL AS 5J4991 - Caterpillar

Engine: C13 (S/N: KCB1-72869)Introduction
Do not perform any procedure in this Special Instruction until you read this information and you understand this information.Problem
Some C13 Truck Engines have been having some issues with excessive oil consumption. Follow the steps below in order to resolve the excessive oil consumption.Solution
Follow the steps below during the next regular oil change.
Flash the engine ECM with new software (to 295-XXXX or later, according to the engine rating) if the serial number is between (S/N: KCB5434-72869). Refer to Table 1 for the proper software file.
Table 1
Rating     New Software Group     Baseline Software Group    
335/1550/2100
335/1550/2300     295-1515 Engine Ratings Electronic