2011/11/08 Caterpillar

Valve Cover Isolation Seals Are Now Used on Certain Engines {1107, 7555}

Usage:

Engine: C-16 (S/N: W1A1-UP) C15 (S/N: KRA1-UP) C18 (S/N: EJG1-UP)
Generator Set: 3456 GEN SET (S/N: C1G1-UP; C3G1-UP; CBX1-UP) C15 GEN SET (S/N: C5E1-UP; C5H1-UP; C5L1-UP; X4R1-UP) C18 GEN SET (S/N: C6C1-UP; G4C1-UP; STD1-UP; STM1-UP) C18 MARINE GS (S/N: CYN1-UP; MGS1-UP)
Industrial Engine: C-15 IND (S/N: BEM1-UP) C-16 IND (S/N: BFM1-UP) C15 IND (S/N: JRE1-UP) C18 INDUSTRIAL (S/N: WJH1-UP)
Marine Engine: 3406E MARINE (S/N: 9WR1-UP) C15 MARINE (S/N: RLA1-UP) C18 MARINE (S/N: PLE1-UP; C1J1-UP)

Description of Change: Improved valve cover isolation seals are now used on the machines that are listed above. The improved valve cover isolation seals reduce the possibility of oil leakage around the bolt holes.

Adaptable To:

Note: The improved valve cover isolation seals have the same part numbers as the previous valve cover seals.

The improvement in the valve cover isolation seals is due to chamfered bolt holes (1) and extra sealing beads (2). Refer to Illustration 1. The improved valve cover isolation seals are adaptable back to the first production of the listed machines.

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Illustration 1	g02759980

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Table 1
Effective Serial Numbers
S/N:9WR10674-UP
S/N:C1G01672-UP
S/N:C3G01418-UP
S/N:CBX00867-UP
S/N:BEM07165-UP
S/N:C5E02157-UP
S/N:C5H01104-UP
S/N:C5L05242-UP
S/N:JRE10347-UP
S/N:KRA02550-UP
S/N:RLA01080-UP
S/N:X4R00448-UP
S/N:BFM02555-UP
S/N:W1A01181-UP
S/N:C1J01136-UP
S/N:C6C00734-UP
S/N:CYN00790-UP
S/N:EJG01661-UP
S/N:G4C04908-UP
S/N:MGS00729-UP
S/N:PLE00638-UP
S/N:STD00230-UP
S/N:STM01596-UP
S/N:WJH06395-UP

The change is effective at the factory with the engine serial numbers that are listed in Table 1.