Symptoms - Engine Mechanical

Symptoms - Engine Mechanical

Strategy Based Diagnostics

1. Perform A Diagnostic System Check in Engine Controls before using the symptom tables (if applicable). Diagnostic System Check - Vehicle
2. Review the system operations in order to familiarize yourself with the system functions. Refer to Disassembled Views, Engine Component Description, and Lubrication 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 problem. 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.
- Check 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 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:

- Base Engine Misfire without Internal Engine Noises Diagnostic System Check - Vehicle
- 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 Compression Test Testing and Inspection
- 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
- Oil Consumption Diagnosis Oil Consumption Diagnosis
- Oil Pressure Diagnosis and Testing Oil Pressure Diagnosis and Testing
- Oil Leak Diagnosis Oil Leak Diagnosis
- 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