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FJR Motorcycle Forums
Technical & Mechanical Problems
Crush washer / oil drain bolt
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<blockquote data-quote="C&amp;C" data-source="post: 513941" data-attributes="member: 435"><p>I've answered this in other threads. The crush washer has a hard flat surface and the softer crushable surface. The flat hard surface goes toward the engine proper (as this surface is milled flat at the factory). Now since the oil drain bolt is forged it is not (or may not) be perfectly flat. This is where the crushable side of the washer deforms to then match any imperfections and create the seal.</p><p></p><p>And, as per the service manual; if the old washer is not damaged, it can be reused.</p><p></p><p>Nothing wrong with changing it over to a copper washer but that isn't significantly better either.</p></blockquote><p></p>
[QUOTE="C&C, post: 513941, member: 435"] I've answered this in other threads. The crush washer has a hard flat surface and the softer crushable surface. The flat hard surface goes toward the engine proper (as this surface is milled flat at the factory). Now since the oil drain bolt is forged it is not (or may not) be perfectly flat. This is where the crushable side of the washer deforms to then match any imperfections and create the seal. And, as per the service manual; if the old washer is not damaged, it can be reused. Nothing wrong with changing it over to a copper washer but that isn't significantly better either. [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
Crush washer / oil drain bolt
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