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Message: <blockquote data-quote="astroboy" data-source="post: 16770" data-attributes="member: 4527"><p>I suspect nothing was done to my air filter during my 1st BSRI service last week at the SC. At 24k km I figured the OEM air filter is pretty clogged up because if its K&N, it would be pretty dirty at 20k km. Since our air filter element is covered/protected by a synthetic wool sleeve, it's washing time! <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite8" alt=":D" title="Big Grin    :D" loading="lazy" data-shortname=":D" />Refer here for instruction to open the AF box:<a href="http://www.bmwclubmalaysia.com/forums/showthread.php?t=18090" target="_blank">http://www.bmwclubmalaysia.com/forums/showthread.php?t=18090</a>"Prying" open the air filter box after removing the several T-20 screws:<img src="http://i19.photobucket.com/albums/b161/klchew/DIY/E90/WashAF1.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" />Separated the sleeve from the element:<img src="http://i19.photobucket.com/albums/b161/klchew/DIY/E90/WashAF2.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" />Dip the sleeve into a bucket of water premix with dish cleaning detergent:<img src="http://i19.photobucket.com/albums/b161/klchew/DIY/E90/WashAF3.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" />Moving the sleeve in and out of the soap water repeatedly for several minutes and this is what u get:<img src="http://i19.photobucket.com/albums/b161/klchew/DIY/E90/WashAF4.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" />After cleaning, it dries pretty fast because the synthetic wool repels water:<img src="http://i19.photobucket.com/albums/b161/klchew/DIY/E90/WashAF5.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" />Slot it back to the filter element and kao tim!<img src="http://i19.photobucket.com/albums/b161/klchew/DIY/E90/WashAF6.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" />Now, expecting my all time FC meter to drop from 11.5L/100km to below 11 region.. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite7" alt=":p" title="Stick Out Tongue    :p" loading="lazy" data-shortname=":p" /> <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite8" alt=":D" title="Big Grin    :D" loading="lazy" data-shortname=":D" />A new discovery while doing this DIY:I got this Air Filter buffer box removed by unscrewing T-15 screws marked with the red cross in the photo.<img src="http://i19.photobucket.com/albums/b161/klchew/DIY/E90/AFbuffer01.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" />Flipping it over I noticed the interesting rips and air tunnel EXCEPT the huge green question mark:<img src="http://i19.photobucket.com/albums/b161/klchew/DIY/E90/AFbuffer2.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" />Check out the inlet in this close up:<img src="http://i19.photobucket.com/albums/b161/klchew/DIY/E90/AFbuffer03.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" />When in position, pay attention to the right inlet:<img src="http://i19.photobucket.com/albums/b161/klchew/DIY/E90/AFbuffer4.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" />You see what I see? <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite9" alt=":eek:" title="Eek!    :eek:" loading="lazy" data-shortname=":eek:" /></p></blockquote><p></p>

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