1994/06/24 Caterpillar

New Intake And Exhaust Valves Used{1105,1100}

Usage:

3406 (92U),
3406B (7FB, 8TC, 4MG, 5YG, 3ZJ),
3406C (5KJ, 4CK),
3408/3408B (28V) Truck Engines

Reference: Truck Engine News, April 1994, Page 2, "Identification Of Intake and Exhaust Valves That May be Used In Remanufactured Direct Injected 3400 Cylinder Heads".

Description of Change: New intake and exhaust valves are used in these engines. The new valves have chrome plated stems that provide a harder, slicker surface. This extends the valve life by resisting sticking. The chrome plated stems also promote precise valve actuation which reduces valve head stress and minimizes deposit build-up.

Adaptable To: The new 108-5902 Intake Valve and 106-1111 Exhaust Valve are direct replacements for the former 2W-2622 Intake Valve and 1W-3860 Exhaust Valve.

Remanufactured Cylinder Heads

The Reference article contained part numbers of valves used in remanufactured direct injection cylinder heads. Beginning in February 1994, remanufactured cylinder heads contain only the 108-5902 Inlet and 106-1111 Exhaust Valves.

Caterpillar Information System:

1994/05/31 New Oil Cooler And Filter Base Assembly And New Oil Cooler And Filter Base Group Have Stronger Mounting Flanges {1378,1306}

1994/05/31 Date Code On 7000 Series Fuel Injection Nozzles; New Seals Used In 7000 Series Fuel Injection Nozzles {1254}

1994/04/22 Service Tools For Electronic Controls{0781,0782}

1994/04/22 Final Control Group (Personality Module) Update{1902}

1994/04/22 Fuel Injection Pump Improvements{1251}

1994/04/22 Identification Of Intake And Exhaust Valves That May Be Used In Remanufactured Direct Injected 3400 Cylinder Heads{1105}

1994/04/22 New Air Compressor Drive Gear Used In Accessory Drive Group{1207}

1994/04/22 New Power Steering Pump Drive Gear Used In Accessory Drive Group{1207}

1994/03/01 The Ninth Edition Of The Lubricating Oils Data Book Is Available From The Engine Manufactures Association (EMA) {1318}

1994/03/01 Electromagnetic Fan Clutch Available{1359}

1994/03/01 Improved Ceramic Turbocharger Group Used{1052}

1994/03/01 Improved 1R-0712 Fuel Filter Available{1261}

1994/06/24 New Rocker Arm Adjustment Screw Used To Adjust Valve Clearance{1123,1100}

1994/06/24 New Valve Lifter Assembly Provide Improved Lubrication Of Lifter Roller And Camshaft Lobes{1209,1210}

1994/06/24 Procedure For Lapping Sealing Surfaces Of Fuel Injection Pump Barrels And Bonnets{1251}

1994/06/24 Installation Procedure For 1R-0716 Engine Oil Filter{1318}

1994/07/01 Be Sure To Use The Correct Reverse Flow Check Valve{1251}

1994/07/01 Fuel Injection Nozzle Spray Orifice Plugging{1254}

1994/08/30 Changes To 3116 Truck Engine For 1994{0374}

1994/08/30 Use Of 4C-4377 Stress Plate Group In 3116 Cylinder Block Reconditioning{0672,0673,1201}

1994/08/30 Service Procedure For 40 Pin Connector Seal{1901}

1994/08/30 December 1993 FLASH File Update And Fan Control Logic{1902}

1994/08/30 New 310A Jake Brake® Available{1119}

1994/08/30 New Oil Pressure Regulating Valve Used In Oil Filter Group{1315}