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The BMW Range
3 Series
E46
BMW E46 Lifestyle Edition Consuming Engine Oil
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<blockquote data-quote="Vincent Hor" data-source="post: 593349" data-attributes="member: 1221"><p>In my opinion it's actually good news that the engine has been replaced. I guess the previous owner had it replaced due to too much oil sludge. Do a search, many N42 engines especially the CKD models suffers oil sludge problem due to the 25k service intervals. </p><p></p><p>Based on your oil consumption at 5K mileage it is not so alarming. I believe you are right that valve oil seals could be the problem. This job should not cost you much. Some mechanics can perform this valve seal replacement without removing the cylinder head. </p><p></p><p>Btw what is the basis for your mechanic to suggest a top or complete overhaul? Any compression test done? Is your car puffing blue smokes? Has your car performance been poor lately?</p></blockquote><p></p>
[QUOTE="Vincent Hor, post: 593349, member: 1221"] In my opinion it's actually good news that the engine has been replaced. I guess the previous owner had it replaced due to too much oil sludge. Do a search, many N42 engines especially the CKD models suffers oil sludge problem due to the 25k service intervals. Based on your oil consumption at 5K mileage it is not so alarming. I believe you are right that valve oil seals could be the problem. This job should not cost you much. Some mechanics can perform this valve seal replacement without removing the cylinder head. Btw what is the basis for your mechanic to suggest a top or complete overhaul? Any compression test done? Is your car puffing blue smokes? Has your car performance been poor lately? [/QUOTE]
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BMW E46 Lifestyle Edition Consuming Engine Oil
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