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The BMW Range
3 Series
E46
Mild white smoke from the exhaust pipe
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<blockquote data-quote="Vincent Hor" data-source="post: 630352" data-attributes="member: 1221"><p>I don't understand why mechanics are eagerly suggesting top or full overhaul for these N42/N46 engines. Good money and the perception that the engine is problematic? </p><p></p><p>Don't let them take you for a ride. White smokes & engine oil consumption could just be caused by harden valve seals. My mechanic don't encourage top or full overhaul on these Alu engines. Cylinder block needs to be rethreaded & new head bolts installed inorder to get back to factory torque settings. Thus cost escalates.</p><p></p><p>With the right tools & experience replacement of valves seals can be done without removing the head. I understand that this job can be done in under RM1k (parts & labour)</p><p></p><p>So before you jump straight to top/full overhaul, it's best to check with a few reputable mechanics for their views & options.</p></blockquote><p></p>
[QUOTE="Vincent Hor, post: 630352, member: 1221"] I don't understand why mechanics are eagerly suggesting top or full overhaul for these N42/N46 engines. Good money and the perception that the engine is problematic? Don't let them take you for a ride. White smokes & engine oil consumption could just be caused by harden valve seals. My mechanic don't encourage top or full overhaul on these Alu engines. Cylinder block needs to be rethreaded & new head bolts installed inorder to get back to factory torque settings. Thus cost escalates. With the right tools & experience replacement of valves seals can be done without removing the head. I understand that this job can be done in under RM1k (parts & labour) So before you jump straight to top/full overhaul, it's best to check with a few reputable mechanics for their views & options. [/QUOTE]
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Mild white smoke from the exhaust pipe
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