Automobile Engineering in ME
The damper fluid leakage typically occur from

Upper damper mounting
Bottom of damper
Clearance between inner and outer tubes of damper
Coil spring mounting

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Automobile Engineering in ME
The function of an oil control orifice is that it

Returns cylinder head lubricating oil to the oil pan at high speed
Removes impurities from cylinder head lubricating oil
Regulates the pressure of engine oil supplied by the oil pump for the lubrication of cylinder head mechanism and other purposes
Turns oil into fine mist for spray lubrication

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