- Symptoms - Engine Mechanical

Symptoms - Engine Mechanical

Strategy Based Diagnostics

1. Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) 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 (Diagrams) , Engine Component Description (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 (Base Engine Misfire without Internal Engine Noises)
* Base Engine Misfire with Abnormal Internal Lower Engine Noises (Base Engine Misfire with Abnormal Internal Lower Engine Noises)
* Base Engine Misfire with Abnormal Valve Train Noise (Base Engine Misfire with Abnormal Valve Train Noise)
* Base Engine Misfire with Coolant Consumption (Base Engine Misfire with Coolant Consumption)
* Base Engine Misfire with Excessive Oil Consumption (Base Engine Misfire with Excessive Oil Consumption)
* Engine Noise on Start-Up, but Only Lasting a Few Seconds (Engine Noise on Start-Up, but Only Lasting a Few Seconds)
* Upper Engine Noise, Regardless of Engine Speed (Upper Engine Noise, Regardless of Engine Speed)
* Lower Engine Noise, Regardless of Engine Speed (Lower Engine Noise, Regardless of Engine Speed)
* Engine Noise Under Load (Engine Noise Under Load)
* Engine Will Not Crank - Crankshaft Will Not Rotate (Engine Will Not Crank - Crankshaft Will Not Rotate)
* Coolant in Combustion Chamber (Coolant in Combustion Chamber)
* Coolant in Engine Oil (Coolant in Engine Oil)
* Turbocharger Whine Noise (Turbocharger Whine Noise)
* Turbocharger Hissing Noise (Turbocharger Hissing Noise)
* Turbocharger Oil Leak From Compressor Seal (Turbocharger Oil Leak From Compressor Seal)
* Turbocharger Oil Leak From Turbine Seal (Turbocharger Oil Leak From Turbine Seal)
* Turbocharger Lack of Oil Supply (Turbocharger Lack of Oil Supply)
* Engine Compression Test (Testing and Inspection)
* Cylinder Leakage Test (Component Tests and General Diagnostics)
* Oil Consumption Diagnosis (Component Tests and General Diagnostics)
* Oil Pressure Diagnosis and Testing (Component Tests and General Diagnostics)
* Oil Leak Diagnosis (Component Tests and General Diagnostics)
* Crankcase Ventilation System Inspection/Diagnosis (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)