Chevrolet Sonic excessive oil leak from oil cooler housing requiring replacement on Chevrolet Sonic

Submitted by Vehicle Owner · Jun 23, 2025
Published by RepairPal

Problem overview

Some Chevrolet Sonic owners report experiencing excessive oil leaks from the oil cooler housing, often requiring replacement due to this common issue. This problem may stem from leaking gaskets between the oil cooler and the engine block, which can typically be replaced without the need for a full cooler replacement. Additionally, many owners find it essential to inspect the oil cooler gaskets for damage and replace any faulty gaskets to effectively address the leak. When replacing the oil cooler gasket, it is crucial to follow proper procedures, such as carefully removing the turbocharger coolant return pipe bolt and clamp to prevent further leakage. Addressing these concerns promptly can help resolve the excessive oil leak issue in the Chevrolet Sonic.

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