Apr . 17, 2025 15:19 Back to list

Choosing the Right Crush Washer: A Key Step for a Leak-Free Oil Change

A crush washer is a soft metal or composite ring used to create a tight seal between the oil drain plug and the oil pan. During an oil change, it’s compressed to form a leak-proof connection. While small in size, using the correct crush washer ensures your engine retains its oil and maintains pressure. Overlooking this simple component can lead to annoying leaks and long-term engine wear.

Matching the Size: From 14mm Crush Washers to 18mm Drain Plug Washers

One of the most important aspects of selecting a washer is getting the right size. 14mm crush washers for example, are commonly used in many Japanese and European vehicles. These washers are often labeled by their inner diameter, so a 14mm ID crush washer fits a 14mm drain plug shaft. Always confirm compatibility with your vehicle’s make and model.

If you drive a larger vehicle or truck, you might need a 16mm sump plug washer or even an 18mm drain plug washer. These are suited for engines with larger oil systems, providing a proper seal for higher flow and pressure rates. A popular option like the 18mm crush washer AutoZone sells is designed for common American models and is readily available for quick replacements.

Why Size and Fit Matter More Than You Think

Installing the wrong size washer—even if it’s only slightly off—can result in poor sealing and oil leaks. A washer that’s too small won’t sit flat, while one that’s too large may not compress correctly. Whether you're buying 14mm crush washers, a 16mm sump plug washer, or an 18mm drain plug washer, always ensure it matches the drain plug’s diameter and thread style.

In addition, make sure to replace the crush washer at every oil change. These washers are designed to deform only once; reusing them often leads to less effective seals and oil seepage over time.

Whether you're shopping for 14mm ID crush washer, 16mm sump plug washer, or an 18mm crush washer AutoZone offers, the right washer ensures a secure, leak-free oil change. Always double-check the size and material before installation to protect your engine and keep your driveway clean.

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