What Causes Oil Leakage in Car Air Conditioning Compressors?
1 Answers
Car air conditioning compressor oil leakage can be attributed to the following reasons: 1. Reason One: First, check for external oil leaks, paying special attention to whether the oil seals at the front and rear of the crankshaft are leaking. Damage, aging, or wear on the front crankshaft oil seal or the contact surface between the crankshaft pulley and the oil seal can cause front crankshaft oil leakage. Similarly, damage to the rear crankshaft oil seal or a too-small oil return hole in the rear main bearing cap, which obstructs oil return, can lead to rear crankshaft oil leakage. Additionally, check for leaks at the rear camshaft oil seal. Aging or damaged oil seals should be replaced promptly. Furthermore, inspect all components of the engine lubrication system for external leaks. 2. Reason Two: If oil is seeping from multiple areas such as the front and rear oil seals, cylinder head covers, valve lifter chambers, oil filter, or oil pan gasket, but no obvious leak is found, examine the crankcase ventilation system. Clean the crankcase ventilation pipes, especially checking if the PCV valve is malfunctioning due to carbon buildup or sticking. Poor crankcase ventilation can increase internal pressure, leading to multiple oil seepage points. 3. Reason Three: If oil continues to leak from the oil filter or oil line connections after tightening, check whether the oil pressure is too high or if the oil pressure relief valve is not functioning properly.
