Catalog: GM Goodwrench Engines Catalog | |
| GENERAL ENGINE DIAGNOSTICS Section IV Page 19 August 2004 Insufficient Lubrication Diagnosis Proper lubrication is critical for engine life. Engine parts are exposed to extremely high temperatures, pressures and mechanical friction. Without sufficient lubrication, these parts can quickly fail from abnormal wear, deep scoring and complete seizure involving metal welding. All engines have a recommended lubricant or oil type, certified by the American Petroleum Institute (API). A Starburst certified oil is the recommended oil for vehicles. Containers for this oil have a "starburst" certification ... | |
| GENERAL ENGINE DIAGNOSTICS Section IV Page 20 August 2004 Poor Coolant Circulation Diagnosis Proper engine operation depends on coolant to flow through the engine water jackets and absorb the heat of combustion, and then to transfer it to the outside air by flowing through the radiator. A typical engine (coolant) operating temperature is about 200 F (94 C); some older engines run cooler and some newer engines run hotter. With proper flow, the engine coolant in most vehicles can readily absorb, transfer and release heat. When the flow or volume of coolant is too low, engine temperatures ... | |
| occurs when the air-fuel mixture burns unevenly and the end gases explode ... | |
| GENERAL ENGINE DIAGNOSTICS Section IV Page 26 August 2004 Engine Mechanical Diagnosis Diagnosing various engine mechanical concerns involves starting with the owner concern (problem symptom), understanding that several possible causes may contribute to that symptom. Also, using certain checks or tests to eliminate some causes and to find the root cause. Concern Possible Cause Check or Test Engine will not turn over Electrical failure (battery, starter, solenoid) Hydrostatic lock Seized engine Turn engine over by hand to verify that this is not a mechanical failure. Determine fluid ... | |
