1983/04/04 Caterpillar

New Gasket Prevents Leakage{1201,1362,1380}

Usage:

All D379, D398, D399, G379, G398, G399 Engines

Description of Change: A new gasket is now used on the side covers for the water passages in the cylinder block on the above engines. The new gasket has a bead (deposit) of sealant material on both surfaces to help prevent water leakage.

Adaptable As: The new 2W5659 Gasket is a direct replacement for the former 1F4419 Gasket which is canceled. Before installation of the new gasket, thoroughly clean the surfaces of the cylinder block and water passage cover that come into contact with each other. The side cover bolts must be tightened to the correct sequence and standard bolt torque of 43 ± 7 N·m (32 ± 5 lb ft).

After replacement of the gasket, tighten the cover bolts as shown in the diagram that follows.

Illustration 1. Gasket location.

Illustration 2. Sequence to tighten bolts.

Caterpillar Information System:

1983/04/04 Oil Passage Plugs Are No Longer Installed In Crankshafts For Parts Service{1202}

1983/04/04 Improved Valve Springs Available{1108}

1983/03/21 8S1603 Socket Group For Use On Bolts With 12 Point Heads{0612}

1983/03/21 New Turbocharger Inlet Tube Assembly And New Seal Available{1059,1061}

1983/03/21 FT1588 Cover Storage Rack{0634}

1983/03/21 New Shutoff Solenoid Group Used{1259}

1983/03/21 Application Of Labels To Plastic Tool Cases{0630}

1983/03/21 New Bolt Used In Front Engine Support{1154}

1983/03/14 Change Made To 6V3032 Deluxe Test Lead Kit{0651}

1983/03/14 Additions To Reference Chart For Major Production Changes{0374,0375,1000}

1983/03/14 "Gas Engine Application And Installation Guide" Now Available{0374}

1983/03/14 Fabricated Bracket Decreases Stress On Refrigerant Compressor Bracket{1405,1802}

1983/04/04 Labyrinth-Type Seal Ring Available For Rear Power Takeoff{3055}

1983/04/04 New Washer And Bolts Keep Fan Drive Tight{1359}

1983/04/04 Use The 6V5000 Infrared Thermometer Group To Measure Temperatures{0651}

1983/04/04 New Connecting Rod Bearings Used{1219,1230}

1983/04/18 Machine Available To Balance Turbochargers {0650,1052,1053,1077}

1983/04/18 New O-Ring Seals Used On Cover For Auxiliary Start Connector {1401,1402}

1983/04/18 Protection Of Electric System For Machines Used In Corrosive Applications {1400}

1983/04/18 New Special Instruction Available For 6V4135 Halogen Leak Detector {0651}

1983/04/18 Use Of 9S3265 Retaining Compound On AiResearch Turbocharger Compressor Wheel Retainer Nuts {1052,1053}

1983/04/18 Use Pneumatic Tool To Remove Gaskets, Sealants, Paints {0610}

1983/04/18 Changes And Recommendations For Oil Pumps {1304}

1983/04/18 Repair Kit For Diesel Fuel Heater Available {1296}