Turbocharger Popping Noise Does Not Cause Damage{1052}
Usage:
3406C (3ZJ),
3406E (5EK) Truck Engines
Popping noises can be generated by the turbocharger for different reasons. Because the 1994 engines have higher boost levels and low inertia turbochargers, the popping noise is generated in a different manner.
When the engine is developing moderate to high power levels and the throttle pedal is suddenly released, the boost pressure will reduce the turbocharger speed. The boost pressure then goes back through the compressor housing causing a popping or swishing sound. Two conditions that cause the popping sound are a rapid release of the throttle or disengaging the cruise control.
The popping sound caused by these conditions has not caused any failures.
Caterpillar Information System:
1994/09/01 Remanufactured 3400 Cylinder Heads Now Use Intake And Exhaust Valves With Chrome Plated Valve Stems{1105}
1994/09/01 Improved Fuel Pump Bonnet Seal Has Better Heat Resistance{1251}
1994/09/01 New Fuel Priming Pump Assembly Used In Fuel Priming Pump Group{1258}
1994/09/01 New Fuel Priming Pump And Gasket Used{1258}
1994/09/01 Caterpillar Introduces New Long Life Heavy Duty Engine Coolant{1395}
1994/08/30 Use Only Clean Engine Oil To Lubricate Unit Injector O-Rings{1290}
1994/08/30 Changing Complete Sets Of Fuel Injection Pump Groups May Not Fix Low Power Problems{1251}
1994/08/30 New Water Seals Used in 3400 Head Assemblies{1124}
1994/08/30 New Exhaust Manifolds, Longer Mounting Studs And Spacers Used In Exhaust Manifold Groups{1059}
1994/08/30 Longer Studs And Spacers Used To Retain Exhaust Manifolds{1059}
1994/08/30 False Logging Of Diagnostic Codes 100-01 (FC46) "Low Oil Pressure" And 100-11 (FC46) "Very Low Oil Pressure"{1902}
1994/08/30 New Oil Pressure Regulating Valve Used In Oil Filter Group{1315}
1994/09/01 Additional Parts Now Provided With 0R-4180 Remanufactured Cylinder Head Assembly{1100}
1994/09/01 New Seals In Pump Fastener Group And Fuel Injection Pump Group Have Improved Heat Set Resistance{1251}
1994/09/01 Impeller Appearance On Remanufactured 3406 Water Pump{1364,1361}
1994/09/01 New Gasket Provides Improved Sealing Between Air Compressor And Drive{1803}
1994/09/01 117-7213 Control Group (Vehicle Speed Filter) Available For Field Installation{1914}
1994/09/01 Caterpillar Legendary Service Literature Catalog SELD0811 Updated{0374}
1994/10/01 Catalytic Converter/Muffler Identification{1062,1091}
1994/10/01 New Rear Crankshaft Seal Groups Available{1161}
1994/10/01 Corrections To 3176B/3406E Electronic Troubleshooting Guide{0374,1901}
1994/10/01 Check 9U-7242 Valve Spring Compressor Plate For Correct Thickness{0703}
1994/10/01 New Engine Crankshaft Rubber Damper Assembly Uses Improved Rubber Material{1205}
1994/11/01 Verification of Connecting Rod Eye Bushing Retention When Overhauling Engines{1218}