q5 engine oil seepage causes are as follows:
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1. The oil pan liner is damaged or the screw is loose and leaking oil;
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2, oil pan drain plug gasket damaged, missing or loose oil leakage;
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3, timing gear cover gasket assembly improper, damaged or screw loose oil leakage;
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4, engine support plate deformation or gasket seal is not tight oil leakage;
5, valve chamber cover gasket seal is not tight oil leakage.