As a Honda owner, the crush washer you should be most concerned with is the one that must be replaced every time you change your motor oil. This crush washer fits between your oil pan and the drain plug. It is a one-time-use washer. Discard the old washer at each oil change and replace with a new one. If you have your oil changed at any service outlet other than a Honda dealer, remind them of the importance to use a new crush washer.
When a new washer is installed and the drain plug is tightened, this washer "crushes" to form a very tight seal, thereby preventing motor oil leaks without overstressing the oil pan threads.
Oil changers who are not aware of its importance may think it's OK to re-use this washer. Since it has already been crushed, it will not collapse further. As a result, the installer may overtighten the drain plug to get a tight fit. This can eventually lead to stripped threads in the oil pan -- a very expensive repair.
This is another example of why your Honda dealer is the easy choice for your service needs. Honda dealers know your Honda best.
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