Symptoms - Engine Mechanical 5.3L
Strategy Based Diagnostics
- Perform a
Diagnostic System Check - Vehicle before using the symptom tables.
- Review the system operations in order to familiarize yourself with the system functions. Refer to
Disassembled Views,
Engine Component Description,
Lubrication Description - Main Pressure Below 55 psi with Cylinder Deactivation (Active Fuel Management) Off,
Lubrication Description - Main Pressure Above 55 psi with Cylinder Deactivation (Active Fuel Management) Off,
Lubrication Description - Main Pressure Below 55 psi with Cylinder Deactivation (Active Fuel Management) On,
Lubrication Description - Main Pressure Above 55 psi with Cylinder Deactivation (Active Fuel Management) On,
Cylinder Deactivation (Active Fuel Management) System Description, and
Drive Belt System Description.
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. For a detailed explanation, refer to
Strategy Based Diagnosis.
Visual/Physical Inspection
| • | 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:
Symptoms - Engine Mechanical 6.0L
Strategy Based Diagnostics
- Perform the
Diagnostic System Check - Vehicle before using the symptom tables, if applicable.
- Review the system operations in order to familiarize yourself with the system functions. Refer to
Disassembled Views,
Engine Component Description,
Lubrication Description, and
Drive Belt System Description.
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. For a detailed explanation, refer to
Strategy Based Diagnosis.
Visual/Physical Inspection
| • | 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 oil filter. |
| • | 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 make sure 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:
| • | Oil Pressure Relief Valve Diagnosis and Testing |
