Thinner Spacer Plates Not Recommended On Certain 3406E Through C18 On-Highway Truck Engines To Resolve Cylinder Liner Projection{1239} Caterpillar

Engine:

3406E (S/N: 1MM1-UP; 2WS1-UP; 6TS1-UP; 1LW1-UP)

C-15 (S/N: C2A1-UP; EGH1-UP; 6NZ1-UP; 9NZ1-UP)

C-18 (S/N: CJP1-UP; MDP1-UP; MEP1-UP)

C15 (S/N: KRA1-UP; TRB1-UP; JEP1-UP; SDP1-UP; BXS1-UP; MXS1-UP; NXS1-UP)

Introduction

The problem that is listed below does not have a known permanent solution. Until a known permanent solution is found, use the solution that is stated below.

Problem

Some On-Highway Truck Engines may experience head gasket failures, liner flange cracks, and spacer plate gasket oil leaks after engine overhaul or repairs that require removal of the cylinder head.

The 138-9381 Spacer Plate and 424-7052 Spacer Plate are no longer recommended to correct liner projection as a repair process.

Solution

Refer to Reuse and Salvage Guidelines, SEBF9390, "Visual Inspection of Liner Seats for 3400, C15, C16, and C18 Series Engines" for the proper procedures.

If ordering the 138-9381 Spacer Plate and/or 424-7052 Spacer Plate , the following items will be requested for :

• Liner projection measurements from Testing and Adjusting, "Cylinder Liner Projection - Inspect"

• Photographs of the block liner seat area as shown in Reuse and Salvage Guidelines, SEBF9390, "Visual Inspection of Liner Seats for 3400, C15, C16, and C18 Series Engines"