Symptoms - Engine Mechanical

Symptoms - Engine Mechanical

Strategy Based Diagnostics

1. Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle before using the symptom tables, if applicable.

2. Review the system operations in order to familiarize yourself with the system functions. Refer to Disassembled Views Locations , Engine Component Description (LDK, LHU) Description and Operation , and Lubrication Description Description and Operation.

All diagnosis on a vehicle should follow a logical process. Strategy based diagnostics is a uniform approach for repairing all systems. The diagnostic flow may always be used in order to resolve a system condition. The diagnostic flow is the place to start when repairs are necessary.

Visual/Physical Inspection

* Inspect for aftermarket devices which could affect the operation of the engine.

* Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.

* Inspect for the correct oil level, proper oil viscosity, and correct filter application.

* Verify the exact operating conditions under which the concern exists. Note factors such as engine RPM, ambient temperature, engine temperature, amount of engine warm-up time, and other specifics.

* Compare the engine sounds, if applicable, to a known good engine and ensure you are not trying to correct a normal condition.

Intermittent

Test the vehicle under the same conditions that the customer reported in order to verify the system is operating properly.

Symptom List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:

* Base Engine Misfire without Internal Engine Noises (LDK, LHU) Base Engine Misfire without Internal Engine Noises

* Base Engine Misfire with Abnormal Internal Lower Engine Noises (LDK, LHU) Base Engine Misfire with Abnormal Internal Lower Engine Noises

* Base Engine Misfire with Abnormal Valve Train Noise (LDK, LHU) Base Engine Misfire with Abnormal Valve Train Noise

* Base Engine Misfire with Coolant Consumption (LDK, LHU) Base Engine Misfire with Coolant Consumption

* Base Engine Misfire with Excessive Oil Consumption (LDK, LHU) Base Engine Misfire with Excessive Oil Consumption

* Engine Noise on Start-Up, but Only Lasting a Few Seconds (LDK, LHU) Engine Noise on Start-Up, but Only Lasting a Few Seconds

* Upper Engine Noise, Regardless of Engine Speed (LDK, LHU) Upper Engine Noise, Regardless of Engine Speed

* Lower Engine Noise, Regardless of Engine Speed (LDK, LHU) Lower Engine Noise, Regardless of Engine Speed

* Engine Noise Under Load (LDK, LHU) Engine Noise Under Load

* Engine Will Not Crank - Crankshaft Will Not Rotate (LDK, LHU) Engine Will Not Crank - Crankshaft Will Not Rotate

* Coolant in Combustion Chamber (LDK, LHU) Coolant in Combustion Chamber

* Coolant in Engine Oil (LDK, LHU) Coolant in Engine Oil

* Turbocharger Whine Noise (LDK, LHU) Turbocharger Whine Noise

* Turbocharger Hissing Noise (LDK, LHU) Turbocharger Hissing Noise

* Turbocharger Oil Leak From Compressor Seal (LDK. LHU) Turbocharger Oil Leak From Compressor Seal

* Turbocharger Oil Leak From Turbine Seal (LDK, LHU) Turbocharger Oil Leak From Turbine Seal

* Turbocharger Lack of Oil Supply (LDK. LHU) Turbocharger Lack of Oil Supply

* Engine Compression Test Testing and Inspection

* Cylinder Leakage Test Cylinder Leakage Test

* Oil Consumption Diagnosis Oil Consumption Diagnosis

* Oil Pressure Diagnosis and Testing Oil Pressure Diagnosis and Testing

* Oil Leak Diagnosis Oil Leak Diagnosis

* Crankcase Ventilation System Inspection/Diagnosis (With Turbocharger) Testing and Inspection

* Drive Belt Chirping, Squeal, and Whine Diagnosis Drive Belt Chirping, Squeal, and Whine Diagnosis

* Drive Belt Rumbling and Vibration Diagnosis Drive Belt Rumbling and Vibration Diagnosis

* Drive Belt Falls Off and Excessive Wear Diagnosis Drive Belt Falls Off and Excessive Wear Diagnosis

* Drive Belt Tensioner Diagnosis Testing and Inspection