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BMW valve stem seals opinion
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<blockquote data-quote="Rodney_gold" data-source="post: 639316" data-attributes="member: 579"><p>It wont be valve stem seals.. what happens with failing ones is that when the car is at rest , the oil seeps down the valve stems and you will get a big cloud of smoke on start up , but not when you travelling or warmed up.</p><p>Oil consumption warmed up and smoke only when warmed up mean piston and ring and cylinder issues.</p><p>You really only have to worry when oil consumption is so high that it actually messes with the fuel/air mixture and the car either pings or is retarded to the point where it seriously effects performance or its really smoking badly</p><p>Check your PCV valve first before anything, it evacuates oil vapour etc to the engine and sends them back into the intake , if its faulty or blocked , it will also make you use more oils as crankcase pressure increases or it sucks too much</p></blockquote><p></p>
[QUOTE="Rodney_gold, post: 639316, member: 579"] It wont be valve stem seals.. what happens with failing ones is that when the car is at rest , the oil seeps down the valve stems and you will get a big cloud of smoke on start up , but not when you travelling or warmed up. Oil consumption warmed up and smoke only when warmed up mean piston and ring and cylinder issues. You really only have to worry when oil consumption is so high that it actually messes with the fuel/air mixture and the car either pings or is retarded to the point where it seriously effects performance or its really smoking badly Check your PCV valve first before anything, it evacuates oil vapour etc to the engine and sends them back into the intake , if its faulty or blocked , it will also make you use more oils as crankcase pressure increases or it sucks too much [/QUOTE]
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