Look for any nicks, burrs, or damage to the plug's sealing surface. Under-tightening will not provide a proper seal.
Oil Drain Plug Crush Washer Basics: Inspection and Installation Best Practices
Best Practices for Installation and Maintenance To ensure a leak-free seal and avoid the headaches of a stripped plug, following best practices is essential. In more extreme cases, a failed seal can cause the drain plug to strip completely, leading to a much larger repair and a significant mess.
First, always inspect the drain plug and the washer well. Reusing a crush washer is a primary cause of leaks, as the metal becomes work-hardened and loses its ability to seal effectively.
Oil Drain Plug Crush Washer Basics: Inspection and Installation Best Practices
Clean the area thoroughly to remove any old gasket material or debris. When installing a new washer, hand-thread the plug into the drain hole to ensure the threads are properly engaged before using any tools.
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