1992/03/02 Caterpillar

Procedure To Repair Oil Leak At Rear Camshaft Cover{1221}

Usage:

Challenger 75 ( 4CJ ) Tractors;
3176 ( 2YG, 7LG ) Truck Engines

If there is an oil leak at the rear camshaft cover, the probable source of the leak is cover mounting bolt hole (1) which intersects a camshaft bore passage in the spacer assembly. The non-pressurized oil may leak past the bolt threads to the outside of the engine.

Use the procedure that follows to repair oil leaks and to prevent oil leaks during normal camshaft cover installation.

1. Remove the rear camshaft cover from the spacer assembly.

2. Use 8T9011 Component Cleaner to thoroughly clean the threads on the three camshaft cover mounting bolts and in bolt holes (1) and (2) in the spacer assembly. Allow to dry.

Spacer Assembly viewed from rear. Location of spacer assembly bolt holes used to fasten rear camshaft cover.

3. Apply 6V1541 Quick Cure Primer to the threads on the bolts and in the bolt holes in the spacer assembly. Allow the primer to dry.

4. Put 9S3263 Thread Lock on the three bolts. Install the rear camshaft cover with the three bolts.

Caterpillar Information System:

1992/02/24 Be Sure To Use Correct Connector/Connectors Between Fuel Transfer Pump Outlet And Tube To Fuel Filter{1274,1256}

1992/02/24 1P8116 O-Ring Seal Available To Service Unit Injectors{1290}

1992/02/17 New Fuel Line Assemblies And Adapter Assembly Used{1252}

1992/02/17 New Cylinder Head Gasket Used{1124,1100,1101}

1992/02/17 New 100 Amp Alternators Available For Applications With Large Electrical Requirements{1405}

1992/02/10 Light Green Gasket Material On Secondary Air Filter Elements May Stick To Filter Housing{1054,1051}

1992/02/10 The Letter "I" Now Used In Part Numbers{0374}

1992/02/03 Many Commercial Folded Core Radiators Can Be Converted To Multiple Row Module Radiators{1353}

1992/02/03 New Oil Filler Tube Assembly Helps Prevent Cracking{1316}

1992/02/03 Oil Capacity Increased{1302,1326}

1992/02/03 New Cast Iron Valve Rocker Arm Groups Provide Improved Bearing Retention{1123}

1992/02/03 5P7437 Adapter (Part Of 8T5301 Diesel Timing Adapter Group) Must Be Modified To Work On Current Fuel Lines.{0782}

1992/03/02 New Combustion Seal (O-Ring Seal) Used In Unit Injection Pump Group{1290}

1992/03/02 Fuse Blocks Have Been Improved And Are Now Serviced{4450}

1992/03/09 New Hose In Turbocharger Oil Lines Group Resists Deterioration Caused By Heat {1307}

1992/03/23 Unit Injector Test Specifications Have Been Updated {0374,1290}

1992/03/23 Troubleshooting Electrical Noise Problems {1900}

1992/03/23 New Electronic Control Groups (Rack Position Sensor And Timing Position Sensor) Provide Increased Reliability {1905,1911}

1992/03/23 Turbocharger Bearings Available For Garrett (Formerly AiResearch) Turbochargers Changed {1053}

1992/03/23 Rotor Shaft Length Changed {4457,4472}

1992/03/23 New Utility Voltage Pickup And Dropout Adjustment Range For Contactor Type Automatic Transfer Switches {4450}

1992/04/06 Procedure For Putting 9U5839 Liquid Gasket Material On Cylinder Liner {1216}

1992/04/06 9U5839 Liquid Gasket Material Available For Use With Aluminum {0649,0648}

1992/04/06 Engine Oil Recommendations Have Been Changed {0374,1300}