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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
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<blockquote data-quote="KennyNUT" data-source="post: 57441" data-attributes="member: 3057"><p><em>First Impressions from Simon Linford:</em></p><p></p><p>Liner is pristine and the oil hole is in the correct place. Looks like it has done 500 miles or less. Unmarked and fine.</p><p></p><p>He also said of the piston that you would expect carbon build up on the piston and so liner and piston look to have been done 500 miles or less ago. Simon did comment on the piston in that it does <strong><u>not</u></strong> have 3 holes drilled under the rings fore and aft, something that he expected to see and helps with excess oil removal from the barrel. I may call Omega who made the VOC piston and ask why some pistons have holes and some don't.</p><p></p><p><strong><em>Any ideas technical gurus?</em></strong></p><p></p><p>Of the head, Simon commented that it was in great condition, overall (upon visual inspection). He said something about the valve seat guides or seals?? I wish I had clarified <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite10" alt=":oops:" title="Oops! :oops:" loading="lazy" data-shortname=":oops:" /></p><p>Also, he will take the head apart and take a closer look.</p><p></p><p><strong><em>Any thought's?</em></strong></p><p></p><p><strong><em><span style="color: #000000"><u>If I have deteriorated or missing valve stem seal, could the vacuum on the intake pull oil down the </u></span></em></strong><a href="http://www.bimmerforums.com/forum/#" target="_blank"><strong><em><span style="color: #000000"><u>intake valve</u></span></em></strong></a><strong><em><span style="color: #000000"><u> guide and into the combustion chamber, causing smoke in the exhaust? Would a weak spring do the same?</u></span></em></strong></p></blockquote><p></p>
[QUOTE="KennyNUT, post: 57441, member: 3057"] [I]First Impressions from Simon Linford:[/I] Liner is pristine and the oil hole is in the correct place. Looks like it has done 500 miles or less. Unmarked and fine. He also said of the piston that you would expect carbon build up on the piston and so liner and piston look to have been done 500 miles or less ago. Simon did comment on the piston in that it does [B][U]not[/U][/B] have 3 holes drilled under the rings fore and aft, something that he expected to see and helps with excess oil removal from the barrel. I may call Omega who made the VOC piston and ask why some pistons have holes and some don't. [B][I]Any ideas technical gurus?[/I][/B] Of the head, Simon commented that it was in great condition, overall (upon visual inspection). He said something about the valve seat guides or seals?? I wish I had clarified :oops: Also, he will take the head apart and take a closer look. [B][I]Any thought's?[/I][/B] [B][I][COLOR=#000000][U]If I have deteriorated or missing valve stem seal, could the vacuum on the intake pull oil down the [/U][/COLOR][/I][/B][URL='http://www.bimmerforums.com/forum/#'][B][I][COLOR=#000000][U]intake valve[/U][/COLOR][/I][/B][/URL][B][I][COLOR=#000000][U] guide and into the combustion chamber, causing smoke in the exhaust? Would a weak spring do the same?[/U][/COLOR][/I][/B] [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
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