What are the causes of rear axle hub oil leakage?
1 Answers
The causes of rear axle hub oil leakage include the following points: External oil leakage: Pay special attention to whether the oil seals at the front and rear ends of the crankshaft are leaking. If the front oil seal of the crankshaft is cracked, damaged, aged, or if the contact surface between the crankshaft pulley and the oil seal is worn, it can cause oil leakage at the front end of the crankshaft. If the rear oil seal of the crankshaft is cracked or damaged, or if the oil return hole of the rear main bearing cap is too small, obstructing oil return, it can cause oil leakage at the rear end of the crankshaft. Additionally, check whether the oil seal at the rear end of the camshaft is leaking. If the oil seal is aged or cracked, it should be replaced promptly. Furthermore, inspect all components of the engine lubrication system for any signs of external leakage. Oil leakage at the front and rear oil seals: If oil is seeping from multiple areas such as the front and rear cylinder head covers, front and rear valve lifter chambers, oil filter, and oil pan gasket, but no obvious leakage point can be found, check the crankcase ventilation system. Clean the crankcase ventilation pipes, especially inspecting whether the PCV valve is malfunctioning due to carbon buildup and gumming. Poor crankcase ventilation can significantly increase the pressure inside the crankcase, leading to oil seepage in multiple areas.
