Some Toyota Avalon owners report experiencing ongoing leaks even after replacing the valve cover gasket. These issues may arise from incorrect installation or loose bolts, which can cause the gasket to shift and lead to further leaks. After the replacement, it is crucial for owners to inspect the left side of the wheel well for any oil residue to confirm the issue has been resolved. Additionally, checking potential leak points such as the timing cover mating area and sealant seam is recommended to ensure the new gasket is properly installed. Thorough inspection and accurate installation are essential steps to effectively address and prevent recurring leaks.
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